Paul wants to buy a new skateboard. The regular price of the skateboard before a 15% discount and before 4% tax is $40. What is the amount of money Paul will need to buy the skateboard after the discount and including tax

Answers

Answer 1
$45.76
$40 x 15% = $6
$40 - $6 = $44
$44 x 4% = $1.76
$44 + $1.76 = $45.76

Related Questions

You start with $575 in your bank account and deposit $60 each month. Write a linear or exponential equation

Answers

Answer:

A linear equation can be used to represent the situation where a fixed amount is added to the original balance each month. The equation would have the form:

y = mx + b

where x is the number of months, y is the balance in the bank account, m is the monthly deposit amount, and b is the initial balance. In this case, we have:

y = 60x + 575

This equation can be read as: "The balance in the bank account (y) is equal to 60 dollars (m) added to the account each month (x), plus the initial balance of 575 dollars (b)."

An exponential equation can also be used to represent the situation where the balance in the bank account increases by a fixed percent each month, it would be:

y = a(1+r)^x

Where a is the initial amount, r is the interest rate and x is the number of months.

Step-by-step explanation:

Baseball And Calculus

Answers

Answer:

Calculus in baseball. In baseball, calculus can be used to optimize the pitcher’s throw to achieve maximum efficiency. Also, calculus can be used to calculate the projectile motion of baseball’s trajectory and to predict if runners can make it to the next base on time given their running speed and the speed of a hit ball.

Step-by-step explanation:

5. Triangle DEF has vertices D(4, -3), E(-2, 1), and F(-9. -6). Find the area of the triangle.

Answers

Area of the triangle DEF = 35 square unit.

What is triangle?

A triangle is a three-sided polygon, which has three vertices. The three sides are connected with each other end to end at a point, which forms the angles of the triangle. The sum of all three angles of the triangle is equal to 180 degrees.

Given,

Vertices of triangle

D(4, -3), E(-2, 1), and F(-9. -6)

   x₁  y₁      x₂ y₂              x₃ y₃

Area of triangle S = 1/2[x₁(y₂−y₃)+x₂(y₃−y₁)+x₃(y₁−y₂)]

Area of triangle DEF = 1/2[4(1 - -6) + -2(-6 - -3) + -9(-3 - 1)]

                                  = 1/2 [4(7) -2(-3) -9 (-4)]

                                  = 1/2[28 + 6 + 36]

                                  = (1/2) (70)

Area of triangle DEF = 35 square unit

Hence, 35 square unit is the area of triangle DEF.

Learn more about triangle here:

https://brainly.com/question/2773823

#SPJ1

What are the roots of the equation 25x^2+60x+37=0 25x ^2 +60x+37=0 in simplest a+bia+bi form?

Answers

The roots of the equation 25x² + 60x + 37 = 0 in simplest form will be - 6/5 + 100i and - 6/5 - 100i.

What are the roots of the equation?

Let the equation be ax² + bx + c = 0.

Then the roots of the equation will be

[tex]\rm x = \dfrac{-b \pm \sqrt{b^2 - 4 a c }}{2a}[/tex]

The equation is given below.

25x² + 60x + 37 = 0

The roots of the equation is given as,

x = [- 60 ± √{(60)² - 4 × 25 × 37}] / (2 × 25)

x = [- 60 ± √(-100)] / 50

x = [- 60 ± 100i] / 50

x = - 6/5 ± 100 i

x = - 6/5 + 100i, - 6/5 - 100i

The roots of the equation 25x² + 60x + 37 = 0 in simplest form will be - 6/5 + 100i and - 6/5 - 100i.

More about the roots of the equation link is given below.

https://brainly.com/question/12029673

#SPJ1

What is called longitude Class 6?

Answers

Vertical lines known as longitudes are used to determine the west or east of the meridian in Greenwich, England. Latitude and longitude work together to help cartographers, geographers, and others find specific locations on the globe.

How is longitude measured?

Distance from the primary meridian is measured in terms of longitude. Longitude lines, often known as meridians, are fictitious lines that divide the Earth. They sprint from pole to pole from north to south, but they gauge the distance in either an east or west direction. The units of longitude are degree, minute, and second.

The North and South Poles serve as the meeting points for imaginary lines that circle the globe vertically (up and down) and are used to calculate longitude. Meridians are the name for these lines. One arc degree of longitude equals one meridian. There are 360 degrees in an orbit around the Earth.

To know more about longitude refer to:

https://brainly.com/question/15414853

#SPJ4

How do you find the coordinates of a vertex in factored form?

Answers

In order to find the y− intercept of a parabola in factored form, plug in 0 for x and find the corresponding y− value

What is coordinates of a vertex in factored form?The simplest way to obtain a vertex in factored form is to locate the axis of symmetry, substitute that as x, and then solve for y. With the formula x=r+s2, which means that r and s are the zeros, it is possible to determine the axis of symmetry. x is the vertex's x-component, or the axis of symmetry. Using the formula x=-b/2a, find the quadratic's vertex, and then substitute the result for y in the original equation. After that, enter the vertex as a variable in the vertex form equation, y=a(x-h)2+k. (A remains the same, h equals x, and K equals y.)The factored form of a quadratic expression is one in which the quadratic expression is the product of two factors, each of which is a linear expression. By extending it, which entails multiplying out the factors, a factored expression can be restated in standard form.

To learn more about coordinates  refer to:

https://brainly.com/question/20935031

#SPJ4

What is equation easy?

Answers

A mathematical equation can be defined in a variety of ways.

Equation that is linear.A quadratic equation.Cubic Formula.Define the term equation?

A mathematical equation can be defined in a variety of ways. The definition of an equation in algebra is a mathematical statement that proves two mathematical expressions are equal.

Equation that is linear.

There could be multiple variables in a linear equation. If a variable's highest power is always 1, an equation is said to be linear. A one-degree equation is another name for it.

A quadratic equation.

A second-order equation is this one. At least one of the variables in quadratic equations needs to be raised to exponent 2.

Cubic Formula.

Third-order equation.There should be at least one variable raised to exponent 3 in cubic equations.

To know more about the equation, here

https://brainly.com/question/27572890

#SPJ4

A triangle has angle measures 23° and 35°. What is the measure of the third angle?

Answers

Answer:

122°

Step-by-step explanation:

All triangles have a total of 180°.

Angle 1 will be X

Angle 2 will be Y

Angle 3 will be z

180 - (x + y) = z

Why is 21 a prime number?

Answers

Answer:

We do not consider 21 as a prime number, because it can be written as a product of two smaller natural numbers

Step-by-step explanation:

The band wanted to do a fundraiser to raise money for the competition trip to Disney land they had an initial amount of money in their booster club account and each band member was expected to raise the same amount the equation 300x + 750 = 23,250 represents the total amount of money in the account after they were done fundraising if z represent the number of students in the band what does 750 likely represent

Answers

The value 750 in equation 300x + 750 = 23,250 represents the initial amount in the club account.

What is an equation?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

2x + 3 = 9 is an equation.

We have,

Initial amount in the club account = m

Amount raised by each member = n

All members raised the same amount.

Number of members = x

The total amount raised by all the members = p

nx + m = p

This is similar to the equation 300x + 750 = 23,250

So,

n = 300

m = 750

p = 23,250

Now,

m = 750 is the initial amount in the club account.

Thus,

750 represents the initial amount in the club account.

Learn more about equations here:

https://brainly.com/question/17194269

#SPJ1

Which polynomial has only one zero?p(x) = 2x²-3x+4p(x) = x² - 2x + 1p(x) = 2x + 3p(x) = 5

Answers

The number of zeros in a polynomial equation is determined by the number of degrees it has, which is n.

Polynomial

A polynomial is a mathematical equation made up of variables, constants, and exponents that are mixed using addition, subtraction, multiplication, and division.

Bi-quadratic Polynomial

(Not comparable) Biquadratic (mathematics) x4 + 3x2 + 2 is an example of a polynomial expression that only uses a variable's zeroth, second, and fourth powers. When used in the form x4 4x3 + 3x2 x + 1, it is sometimes extended to any expression containing the biquadrate or fourth power (but not higher powers).

What is a Polynomial Equation?

Polynomial equations are those created by combining variables, exponents, and coefficients. The greater of its possible exponents is referred to as the equation's degree.

Among all possibilities, the linear polynomial p(x) = 2x+3 is a polynomial of degree 1. Consequently, there is just one zero in it.

Know more about Polynomial Equation

https://brainly.com/question/1600696

#SPJ4

- To meet your sales quota at work, you need to average $125 per day. So far you have sold $150,
$175, $90, and $155. How much do you need to sell on the last day to meet your quota for this
week?

Answers

Hence he need to sell $55 on the last day to meet his quota for this

week.

What is average ?

average can be defined as the ratio of the sum of observations and total number of observations.

Given,

To meet your sales quota at work, you need to average $125 per day.

So far he  sold $150, $175, $90, and $155.

so ,

let last day he need to sell be x .

average = 150+175+90+155+x/ 5

125 = 570+x / 5

625 = 570 + x

x = 55

Hence he need to sell $55 on the last day to meet your quota for this

week.

To learn more about average from the given link.

https://brainly.com/question/24057012

#SPJ1

Which measure of center should Raul use to calculate his overall performance if he hits a line drive to the outfield on each pitch?

Answers

Since the distribution of the 10 distances is not uniform, Raul should use the median to determine his total performance.

What is median?

The median is the value that divides a data sample, a population, or a probability distribution's upper and lower halves in statistics and probability theory.

It could be referred to as "the middle" value for a data set.

The fundamental difference between the mean and the median when describing data is that the median is more representative of the "normal" value because it is not skewed by a tiny fraction of exceptionally big or small values.

Due to the fact that income distribution can be very skewed, the median income, for instance, might be a better indicator of what is considered a "normal" income.

Given that it is the most resilient statistic, the median is crucial to strong statistics.

According to our question-

The home run is an outlier in the data set even if nine lengths are grouped together.

The median is the most accurate indicator of the middle of a data collection including outliers.

learn more about median click here:

https://brainly.com/question/26151333

#SPJ1

Round the angle measure to the nearest hundredth of a degree

Answers

The measure of the angle is 30.00 degrees

How to find sin⁻¹(0.5)?

Trigonometry is the branch of mathematics that deals with the relationships between the sides and angles of triangles, particularly right triangles. It is concerned with the measurement of angles and the calculation of sines, cosines, and tangents of those angles.

These ratios are known as trigonometric functions and they are used to relate the ratios of the sides of a right triangle to the angles opposite or adjacent to the right angle.

Since sin 30° = 0.5

Thus, sin⁻¹(0.5) = 30.00 degrees

Note: Angle 30° is one of the special angles and trigonometric are very easy recall.

Learn more about trigonometry on:

brainly.com/question/29354606

#SPJ1

Which of the following is a solution of the equation x+ 2y 7?a) x=3 y=5b) x=3 y=-5c) x=3,y=2d) x=0.y=7

Answers

(3,2) is the required solution of an equation and This is a straight line and has infinite number of solutions.

the solution is explained as :

y=2

x=7−2(2) =3

Hence, (5,1) is one of the solution of the given equation.

A straight line is an infinite length of an  line that does not have any curves on it. A straight line in which it can be formed between two given points and also but both the ends extend to infinity. A straight line is  formed when two points A (x1, y1) and B (x2, y2) are connected with the shortest distance between them and the line  that ends are extended to infinity.

In the given representation shown below, a straight line between two points A and B is shown. A straight line AB is represented by:

←→

A B

To know more about straight line click here:

brainly.com/question/29223887

#SPJ4                                                                                                                                                                                                                                                                                                                                        

                                                                                                                             

                                                                                                                                             

                                                                                                                                                       

                                                                                                                                                     

                                                                                                                                                                   

Solve the following system of equations using substitution.
y = 2x-2
-4x-y = 26
Solve for x: Solve for y:

Answers

The solution to the given system of linear equations is x = -4, y = -10

Solving system of linear equations

From the question, we are to solve the given system of linear equations.

The given system of linear equations is

y = 2x - 2          ------------ (1)

-4x - y = 26     ------------ (2)

Substitute equation (1) into equation (2)

-4x - y = 26

-4x - (2x - 2) = 26

- 4x - 2x + 2 = 26

-6x + 2 = 26

-6x = 26 - 2

-6x = 24

x = 24/-6

x = -4

Substitute the value x into equation (1)

y = 2(-4) - 2

y = -8 - 2

y = -10

Hence, the x = -4, and y = -10

Learn more on Solving system of linear equations here: https://brainly.com/question/13729904

#SPJ1

Mario and Russell plot a triangle on a coordinate grid and then perform a
rotation and a translation. Russell thinks the original triangle and final triangle
are congruent but Mario disagrees. Which student is correct and why?
Russell is correct. Since neither rotations no translations preserve distance, the
triangles are congruent.
O Mario is correct. Since neither rotations not translations preserve distance, the
triangles are not congruent.
Mario is correct. Since both rotations and translations preserve distance, the triangles
are congruent.

Russell is correct. Since both rotations and translations preserve distance, the
triangles are congruent.

Answers

The right answer is SSS since two triangles are said to be congruency when each of their three sides and Mario is correct.

How can you show a triangle is congruent?

Triangles are said regarded as being congruent if their size and shape actually match exactly. The word "congruent" contains the sign. When a triangle's three sides and three angles match those of a another triangle's three sides and three angles, two triangle are said to be congruent.

Here,

begin by writing the names of the triangles' vertices, beginning with triangles DAB and BCD, as shown below.

AB = CD

DA = BC

In both triangles, side BD is the same, therefore

BD = BD

We can infer that the triangles DAB & BCD are congruent that use the SSS feature of a congruence triangle because they have the same number of sides on each side.

To know more about congruency visit:

brainly.com/question/7888063

#SPJ1

Why 5 Is it possible to construct a triangle with lengths of its sides as 4 cm 3 cm and 7 cm give reason for your answer?

Answers

With sides that are 4 cm, 3 cm, and 7 cm long, a triangle cannot be built. Because the sum of the other two sides does not exceed that of the third side.

A triangle is referred to as a three-sided polygon that has three vertices. The connection of the three sides ends to end at a single point forms the angle of the triangle. The sum of these angles adds up to 180 degrees.

The triangle's three sides are specified as being 4 cm, 3 cm, and 7 cm. Add the two sides together and see if the result exceeds the third side to determine whether these sides constitute a triangle.

Here, the sum of two sides 4 cm and 3 cm is calculated as,

A+B = 4+3

=7 cm

This sum is equal to the third side C = 7 cm.

Therefore,  [tex]A+B\ngtr C[/tex]. So, the given sides don't form a triangle.

To know more about triangles:

https://brainly.com/question/22737630

#SPJ4

What are the 5 rules of factoring?

Answers

The five rules for factoring are taking the difference grouping the numbers, dividing, multiplying, taking the greatest common factor and by taking the LCM.

There are certain times when we encounters such kind of problems which includes the factoring of the components of the polynomial.

Ine Sach kind of cases there are several methods for factoring the components of the polynomial like taking the greatest common factor or finding the LCM of the components in order to make the polynomial more simplified.

Also we can take out the most common digit or the number from the whole polynomial which comes under the category of grouping.

Also we can use the method of taking the differences or like taking the division and multiplication of certain digit into the polynomials in order to do the factoring.

To know more about factors, visit,

https://brainly.com/question/18187355

#SPJ4

Are complex numbers the same as real numbers?

Answers

Although every complex number is a real number, not all complex numbers are real numbers.

What connection exists between real numbers and complex numbers?On the number line, the real numbers can be plotted.The number line cannot be used to plot the complex numbers.The symbol designates it.Complex numbers make up all real numbers.Real numbers are not all complex numbers.Although every complex number is a real number, not all complex numbers are real numbers. The symbol Z C Z in mathbb C ZC denotes the collection of all complex numbers.If a number can be expressed as a+bi using the real integers a, b, it is complicated. So, certainly, a complex number can be both real and totally fictitious.

To learn more about real numbers refer to:

https://brainly.com/question/17201233

#SPJ4

!!!!50 POINTS!!!!

It will take you t seconds to carry the water, which
you will do y times a day. What is the total amount of
time you will be carrying water?
How many hours would you spend carrying water in a
year?
I need an expression, evaluation, and explanation! ASAP

Answers

Answer:

1. t*y

2. 365*t*y

Step-by-step explanation:

Identify variables

T (time) seconds

Y amount of times per day

T * Y = amount of time you would spend carrying water in a day, 24 hrs

365 * t * y = 365 (amount of days per year, multiplied by the amount of time you carry water per day.)

Solve the following problem

Answers

Note that the area of the above triangle is given as: 42.

This is solved using the SOH CAH TOA Rule and the Formula of the Right Angled Triangle

What is the Right Angled Triangle?

The hypotenuse is the longest side of a right triangle, a "opposite" side is the one across from a given angle, and a "adjacent" side is the one close to a given angle. Right triangle sides are described using specific terminology. A right triangle's hypotenuse is always the side opposite the right angle.

To find the area of the triangle we must obtain, the Base and the Height, that is FD and A F.

Note that we have

∠F = 90°

∠D = 30°

Since the sum of angles in a Δ = 180°,

∠A = 180 - (90 + 30)

∠A = 60°

To find the area of the triangle we must obtain, the Base and the Height, that is F D and A F.

To obtain F D, we must use the Sine rule which states:
Sine θ = O/H; that is


Sin ∠A = F D/AD

Sin 60° = F D/14

0.86602540378 = FD/14

F D = 14 * 0.86602540378

F D = 12.1243556529

F D [tex]\approx[/tex] 12. 12

Using the above Cos Rule (CAH) we can find the Adjacent Side (that is height). Thus

Cos A = A F/AD

Cos 60° = A F/14

0.5 = A F/14; multiply both sides by 14

A F = 0.5 * 14

A F = 7

Now we have Adjacent Side  (Height) = 7; and the Opposite Side (Base) = 12.12

The area of the Triangle according to the Pythagorean Rule is:

1/2 B * H

= 1/2 * 12.12 * 7

= 42.42

Thus the Area of the above triangle [tex]\approx[/tex] 42

Learn more about AAS Theorem:
https://brainly.com/question/12642646
#SPJ1

Which of the following is a zero of the polynomial x³ 3x² 3x?A - 1B - 2C 1D 2

Answers

A polynomial is a kind of algebraic expression in which the exponents of all variables should be a whole number.

The Power of the variables in any polynomial has to be a non-negative integer. A polynomial consists of constants and variables, but we cannot perform division operations by a variable in polynomials.

The example of polynomial is: 3x^2 + 5.

given the equation is x^3+3^2+3x.=0

                              (x³-x) +(3x²-3) =0

                              = x (x²-1) +3(x²-1)

                               = (x²-1) (x+3) = 0

                               (a² + b²) = (a+b) (a-b)

                               (x²-1) = (x+1) (x-1)

                              ⇒(x+1) (x-1) (x+3) =0

                               x =- 3, -1, 1

So, the required zeros are -3, -1,1.

To know more about Polynomial:

brainly.com/question/11536910

#SPJ4

help so i can get an A?

Answers

Simplified form of -5⁷÷ 5² is -5⁵.

The correct option is C.

What is expression?

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between. The mathematical operators can be of addition, subtraction, multiplication, or division.

Given expression,

-5⁷÷ 5²

Above expression can be written as

-5⁷/5²

= -1(5⁷)/5²

= -1(5⁵.5²)/5²

= -1(5⁵)

= -5⁵

Hence, -5⁵ is the simplified form of expression -5⁷÷ 5².

Learn more about expression here:

https://brainly.com/question/14083225

#SPJ1

Write an equation
in slope-intercept form of the line that passes through the points

Answers

The equation in slope-intercept form of the line that passes through the points is f(x) = 2x + 2

How to determine the linear function f with the given values.

From the question, we have the following parameters that can be used in our computation:

f(0) = 2 , f(-2) = -2

A linear equation can be represented as

f(x) = mx + c

Substitute the known values in the above equation, so, we have the following representation

m * 0 + c = 2

m * -2  + c = -2

Solving 0 * x + c = 2, we have

c = 2

So, we have

m * -2 + c = -2

This gives

-2 * m + 2 = -2

Evaluate the like terms in the above equation

So, we have the following representation

-2m = -4

Divide both sides of the equation by -2

So, we have

m = 2

Substitute the known values in the equation f(x) = mx + c, so, we have the following representation

f(x) = 2x + 2

Hence, the function is f(x) = 2x + 2

Read more about linear function at

brainly.com/question/4074386

#SPJ1

Complete question

Write an equation in slope-intercept form of the line that passes through the points: f(0) = 2 and f(-2) = -2

Angela ran for 45 mins, her pace was 9 mph. How far did she run (in miles)?

Answers

Angela ran for 6.75 miles

Anna earns $8 an
hour baby-sitting and $6 an hour working in the garden. Last month, she worked 15 hours baby-sitting and 8 hours in the garden. How much more money does she need to buy a robot which costs $199?

Answers

Answer: $31

8(15)+6(8)=168

she needs 31 more to reach 199

Please helpppp
solve the inequality

Answers

Answer:

A) [tex]x>-2[/tex]

Step-by-step explanation:

[tex]x+4>-x \\ \\ 2x+4>0 \\ \\ 2x>-4 \\ \\ x>-2[/tex]

Nicholas collected 66 pounds of shells. If he wanted to split the shells equally amongst 7 friends, how much should he give each friend? Between what two whole numbers does your answer lie?

Answers

Answer:

9 and 10

Step-by-step explanation:

66 divided by 7 would be 9.4 which lies between 9 and 10.

Use a trigonometric ratio to solve for y. Round to two decimal places as necessary!!
HELP, and can someone explain how to get the answer?

Answers

Using Trigonometric identities, the value of y = 11.49.

Trigonometric identities are equality conditions in trigonometry that hold for all values of the variables that appear and are defined on both sides of the equivalence.

These are identities that, geometrically speaking, involve certain functions of one or more angles.

They are not to be confused with triangle identities, which are identities that may involve angles but may also involve side lengths or other lengths of a triangle.

Using Trigonometric Identities,

Cos θ = Base / Hypotenuse

Cos 29 = 10 / y

0.87 = 10 / y

y = 10 / 0.87

y = 11.49

To learn more about Trigonometric Identities from given link

https://brainly.com/question/24349828

#SPJ1

Other Questions
David has kept track of his familys grocery bills for the past 10 weeks, as shown in the table.Week 1 2 3 4 5 6 7 8 9 10Bill ($) 92 106 129 115 100 84 110 156 98 87Would you choose to use a histogram, a circle graph, or a line graph to display the data? Explain your choice. Then make a display. What is the scale factor for Triangle XYZ to Triangle UVW? A. 1/2 B. 2 C. 1/4 D. 4 Question 7 (1 point) The two tables below show the amount of tip, y, included on a bill charging x dollars. A 2-column table with 3 rows titled Restaurant A. Column 1 is labeled x with entries 10, 20, 30. Column 2 is labeled y with entries 1, 2, 3. A 2-column table with 3 rows titled Restaurant B. Column 1 is labeled x with entries 25, 50, 75. Column 2 is labeled y with entries 5, 10, 15. Which compares the slopes of the lines created by the tables? This is worth 33 POInTS PLEASE HELP Despus de dos exmenes, consegu mi (1) 1 of 15 para poder manejar legalmente por primera vez. Reasons for rapid constitutional change __________ is the requirement that every employee be able to perform the work of another employee. solve for x the triangles are similar write in passive voice.this sentence The officer brought out an envelope. An object placed 10.40 cm from a concave spherical mirror produces a real image 7.80 cm from the mirror. If the object is moved to a new position 20.0 cm from the mirror, what is the position of the image After refrigerant lines have been installed they should be evacuated to a(n) ____ vacuum Tell whether the equation 3x - 6y = 0 is a direct variation. Explain. If the equation is a direct variation, identify the constant of variation. Luther High School's basketball coach won a record 33 out of 42 games how many games must the team win in the next 28 games for the coach to maintain to the ratio of wins to losses? As the director of HR, you are in a meeting with your corporate officers discussing the firm's deliberate use of personnel to gain a competitive edge in the marketplace. You are most likely discussing: When raw materials are purchased on account for use in a process costing system, the corresponding journal entry that should be recorded will include: Multiple Choice A debit to Work in Process Inventory. A debit to Raw Materials Inventory. A credit to Cash. A credit to Raw Materials Inventory. A debit to Accounts Payable. Which response is not associated with the successful use of a liquid disinfectant for the inactivation of a biohazard One purpose of the article "Tour the Kremlin" is to createO the sense that the reader is hearing Russian languageO the effect of being part of the Tsar's courtO the idea of being in the presence of Russian historical figuresO the feeling of walking around Moscow An investment banker who earns more than $1 million a year, a food service worker who makes minimum wage, and a teacher with a salary of $50,000 per year represent the presence of social ______ within society. If the concentration of fluoride anion and aluminum cation was increased to 5 m, by how much would the measured ecell change?. If 100 mexican pesos could buy $1.00 u.s. dollar in 2006 and $.87 u.s. dollars in 2010, then:________.