Can someone help me please

Answer:

CD = 27

Step-by-step explanation:

2(4x - 1) + 2(3x + 3) = 116

8x - 2 + 6x + 6 = 116

14x + 4 = 116

14x = 112

x = 8

3(8) + 3

= 24 + 3

= 27

By algebra properties, the values of algebraic expression x³ - 4 · x are - 3 and 0 for x² + x = 3.

In this question we must derive the value of algebraic expression x³ - 4 · x based on the fact that x² + x = 3. First, determine the value of x by algebra properties:

x² + x = 3

x² + x - 3 = 0

x² + (2 - 1) · x + 2 · (- 1) = 0

x² + 2 · x - x - 2 = 0

x · (x + 2) - (x + 2) = 0

(x - 1) · (x + 2) = 0

x = 1 or x = - 2

The roots of x² + x = 3 are 1 and - 2.

Second, determine the values associated with the two roots found in previous step:

x = 1

y = x³ - 4 · x

y = 1³ - 4 · 1

y = 1 - 4

y = - 3

x = - 2

y = x³ - 4 · x

y = (- 2)³ - 4 · (- 2)

y = - 8 + 8

y = 0

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The x and y-intercepts of the given equation of line 8x - 5y = -11 are (-11/8,0) and (0,11/5) respectively.

Given the equation of line in the question;

8x - 5y = -11

To find the x-intercept, substitute in 0 for y  and solve for x.

8x - 5y = -11

8x - 5(0) = -11

8x - 0 = -11

8x = -11

x = -11/8

Hence, the x-intercept is (-11/8,0)

To find the y-intercept, substitute in 0 for x  and solve for y.

8(0) - 5y = -11

0 - 5y = -11

-5y = -11

y = -11 / -5

y = 11/5

Hence, the y-intercept is (0,11/5).

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Answer:

not enough info

Step-by-step explanation:

Let h = number of history books.

Let m = number of math books.

"The number of history textbooks sold was three times the number of math textbooks sold."

h = 3m

"A textbook store sold a combined total of history and math textbooks in a week."

h + m = t

t = total number of books sold.

We have a system of equations:

h = 3m

h + m = t

Since we do not have a value for t, and we have a system of 2 equations in 3 variables, we cannot find the numbers of history or math books sold.

The value of x is equal to 9 for the two-variable equation -2x - 7y = 17 when y is equal to -5.

A two-variable equation is an equation that has 2 variables, typically x and y

For the two-variable equation;

-2x - 7y = 17

we shall evaluate for the value of x when y = -5 as follows:

-2x - 7(-5) = 17

-2x + 35 = 17

subtract 35 from both sides of the equation

-2x = 17 - 35

-2x = -18

divide through by -2

x = -18/-2

x = 9

Therefore, 9 is the value of x when y is equal to -5 for the two-variable equation -2x - 7(-5) = 17.

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The original amount is (100%) if you have an increased by 30%

Percentage increase is the difference between the final value and the initial value, expressed in the form of a percentage.

In the given question, the percentage increase can be calculated with the help of the percentage increase formula,

Percentage Increase = [(Final Value - Initial Value)/Initial Value] × 100

To get the original amount,

Just add the percentage increase to 100, divide 100 by it, then multiple by the final number to get the original number.

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Argument A is deductive and Argument B is inductive.

Deductive reasoning uses broad premises to arrive at specific conclusions, while inductive reasoning starts with specific premises and draws general conclusions.

If the premises are valid, deductive reasoning's conclusions cannot be false. This is so because there is nothing in the conclusion that isn't already there in the premises. Yet, an inductively drawn conclusion goes beyond the information in the premises, unlike deductive reasoning.

Argument A is deductive because from the premise it is saying that the Grand Canyon was carved out by aliens from Jupiter, which is not sure.

Argument B is inductive because from the premise it is saying that Since the United States' Declaration of Independence was signed in the year 1776, it follows that the United States is over 200 years old, which is true.

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The complete question is:

INDUCTIVE /DEDUCTIVE ARGUMENT

Argument A: The Grand Canyon could not have been made by humans, so it follows that the Grand Canyon was carved out by aliens from Jupiter.

Argument B: Since the United States' Declaration of Independence was signed in the year 1776, it follows that the United States is over 200 years old.

0 is not an exponential function.

We know that the general form of exponential function f with base b is defined as:

f(x) = b^x

where b > 0 and b is not equal to 1

and x is any real number.

If it is negative  b < 0, the function is undefined for -1 < x < 1.

If in an exponential function the base is less than zero, then it would make the function values complex for certain fractional values.

If the base of exponential function is 0 then function would create a graph which violates the properties / definition of exponential functions.

Also, we can not write 0 in exponential function form.

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The correct statement is (A) the points on the line would indeed be a part of the equation y = 0.5x.

Relationships between two variables that are proportional occur when their ratios are equal.

Another way to consider them is that in a proportionate relationship, one variable is consistently equal to the other's constant value.

The "constant of proportionality" is the name of this constant.

Observing the graph, the line traverses (0, 0). We obtain y=0.5(0)=0 if x=0.

Since this is the point's y-coordinate, it passes through this.

Y=mx+b, where m is the slope and b is the y-intercept, is the slope-intercept form equation for this line.

m=0.5 and b=0 in this equation.

This indicates that the slope is 0.5 or 1/2; as slope = rise/run, this indicates that the line rises one for every increase in the horizontal dimension of two.

This implies that starting from (0, 0), we would climb 1 and cross 2 to make the spot (2, 1).

When examining the graph, the line passes through this location.

We would then ascend 1 and cross over 2 once more to (4, 2). Once more, the line passes through this spot.

Therefore, the correct statement is (A) the points on the line would indeed be a part of the equation y = 0.5x.

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Complete question:

Which statement best explains if the graph correctly represents the proportional relationship y = 0.5x?

A. Yes, the points shown on the line would be part of y = 0.5x

B. Yes, all proportions can be shown on a graph of this line

C. No, the points shown would not be part of y = 0.5x

D. No, proportions cannot be represented on a graph

The equation of the relationship between the price of oranges last week and this week is y = 1.2x

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

Price last week = x

Rate of increment = 20%

Price this week = y

Using the above as a guide, we have the following:

Price this week = Price last week * (1 + Rate of increment)

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

y = x * (1 + 20%)

Express as decimal

y = x * (1 + 0.2)

Evaluate the sum

y = x * 1.2

So, we have

y = 1.2x

Hence, the equation is y = 1.2x

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The quote mentioned in the question was given by John F. Kerry who was a famous American personality, he was born on 11 December 1943.

Professionally he was an attorney and later became a politician and, diplomat and he currently serves as the first United States special presidential envoy for climate. He is a member of the Forbes family and the Democratic Party, and that he previously served as the 68th United States secretary of state .

Some of his other popular quotes are , "I saw courage both in the Vietnam War and in the struggle to stop it. I learned that patriotism includes protest, not just military service."

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Answer:

For the first question, To determine the probability that a student studied for exactly 1 hour, we can use the formula:

P(X=1) = (number of students who studied for 1 hour) / (total number of students)

In this case,

P(X=1) = 8/30 = 0.27 (rounded to two decimal places)

So the probability that a student studied for exactly 1 hour is 0.27

For the second question, to determine the experimental probability of drawing a heart, we can use the formula:

P(Heart) = (number of times a heart is drawn) / (total number of draws)

In this case,

P(Heart) = 7/20 = 0.35

So the experimental probability of drawing a heart is 0.35

Therefore, the option 3 is the answer.

Step-by-step explanation:

The value of b can be -32 or +32 to ensure that the equation has only one true solution.

The discriminant is the quadratic formula section behind the square root symbol: b2-4ac. The discriminant indicates whether there are two solutions, one solution, or none at all. The "discriminant" is the argument (that is, the contents) of the square root, which is the equation b2 4ac, because by utilizing its value, you may "discriminate" between (that is, determine the difference between) the various solution types.

Here,

The discriminant of the equation is ...

d = b² -4ac

d = b² -4(2)(128)

d = b² -1024

In order for there to be one real solution, we must have d=0. So ...

0 = b² -1024

1024 = b²

±√1024 = ±32 = b

The value of b can be -32 or +32 to cause the equation to have one real solution.

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It is not possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm because the sum of two sides(5 cm and 7 cm) are equal to the third sides(12 cm). Two equal sides cannot form a triangle.

In the given question, we have to check that it is possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm.

The sum of the two sides must always be greater than the third side in order to determine whether or not the given sides may form a triangle.

To check this we firstly add the 5 and 7.

7 + 5 = 12

12 = 12

Now we add 5 and 12

5 + 12 > 7

17 > 7

Now we add 7 and 12

7 + 12 > 5

19 > 5

It is not possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm because the sum of two sides(5 cm and 7 cm) are equal to the third sides(12 cm). Two equal sides cannot form a triangle.

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The complete question is:

Can a triangle have the sides 5 cm 7 cm and 12 cm?

The solution of the trigonometric equation sin^2(2x+3)+cos^2(2x+3)=2x+3 is x = -1.

Trigonometry is the branch of mathematics that deals with the relationship between ratios of the sides of a right-angled triangle with its angles

sin²(2x+3) + cos²(2x+3) = 2x + 3

Remember, the trigonometric identity, sin²θ + cos²θ = 1.

Thus, we can say sin²(2x+3) + cos²(2x+3) = 1. We now have:

sin²(2x+3) + cos²(2x+3) = 2x + 3

1 = 2x + 3

2x = 1-3

2x = -2

x = -2/2

x = -1

Therefore, the solution of the equation is x = -1

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Answer:The 3 in 103 is called the exponent. The expression 103 is called the exponential expression. base → 103 ←exponent

Step-by-step explanation:

Answer:

Two possible ways Arvin can complete his training plan are:

Biking 35 miles a week, 3 days a week, biking 11.67 miles per day.

Biking 41 miles a week, 4 days a week, biking 10.25 miles per day.

In the first option, Arvin bikes 35 miles a week, 3 days a week, which means he bikes 11.67 miles per day to achieve his goal.

In the second option, Arvin bikes 41 miles a week, 4 days a week, which means he bikes 10.25 miles per day to achieve his goal.

It is important to note that these are just examples, and there could be other options that Arvin can consider, as long as it meets his requirement of biking between 35 and 41 miles a week, either 3 or 4 days a week, and the same number of miles each day.

Step-by-step explanation:

Answer:

5•8-(4+2)=34

Step-by-step explanation:

because you need to change the order of operation

39

40-32÷8+5-2

40-4+3

40-1

39

Step-by-step explanation:

[tex]volume \: of \: cylinder = \pi \: {r}^{2} h \\ volume = 3.14 \times {7}^{2} \times 19 \\ = 2923.34 \: millimetres[/tex]

By using the given formula and solving we get, the original value of the vase is 5000 pounds.

A percentage is a way to express a number as a fraction of 100. It is often denoted by the symbol "%". For example, 25% means 25/100 or 0.25. Percentages are often used to express rates of change or proportions.

A rate is a ratio that compares two quantities of different units, such as distance and time, or weight and volume. It is often represented as a fraction or a decimal and can be converted to a percentage by multiplying by 100.

The given formula tells us how the value of the vase changes over time, with the value increasing by a factor of 1.28 (28% increase) every year.

To find the original value of the vase, we need to know the value of the vase when n = 0.

Substituting n = 0 into the formula, we get:

value in pounds = 5000*1.28^0

When n = 0, 1.28^0 = 1, so the original value of the vase is:

value in pounds = 5000*1 = 5000 pounds

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Answer: False

Step-by-step explanation:

-3/7 roughly equals -0.428

-2/5 equals -0.4

-0.4>-0.428

-2/5>-3/7

The quadratic pattern with value of p and q has been proved.

A quadratic in mathematics is a particular kind of problem that involves squaring, or multiplying a variable by itself. This terminology comes from the fact that a square's area equals the product of its side length and itself. Quadratum, the Latin word for square, is where the word "quadratic" originates.

Here,

Given : 1st difference

p−4;

11−p;

q−11;

22−q;

2nd difference−2p+15;

q+p−22;

33−2q−2p+15=1−2p=−14p

=733−2q

=1q+p−22

=1−2q=−32or/of

q+7−22=1

q=16

Therefore , the solution of the given problem of quadratic comes out to be q =16

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The magnitude of the correlation coefficient indicates the strength of the association. For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association.

How to interpret a correlation coefficient?

The statistical measure of how well changes in the value of one variable predict changes in the value of another is called a correlation coefficient. The value rises or falls together when the variables are positively linked.

Is r or r 2 the correlation coefficient?

The summary table in the Regression output contains the "R" value, which is the coefficient of correlation. The term "coefficient of determination" also applies to R square. To obtain the value of R squared, multiply R by R. In other words, the square of the coefficient of correlation is the coefficient of determination.

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Note that the explicit equation and domain for an arithmetic sequence with a first term of 3 and a second term of 5 is n = 3 + 2(n − 1); all integers where n ≥ 1 (Option D)

Arithmetic progression or arithmetic sequence is a numerical series in which the difference between subsequent terms is constant. For example, the sequence 5, 7, 9, 11, 13, 15..

The first term of the arithmetic sequence is 3, followed by 5. Thus, the common difference is, 5-3  = 2. You use these values to the derived formulas for arithmetic progression. One of these formulas is

An = A1 + (n-1)d

where

An is the nth term in the sequence

A1 is the first term of the sequence

n is the total number of terms within the sequence

d is a common difference.

In this problem, A1 = 5 and d=2. Substituting to the equation,

An = 3 + (2)(n-1)

An = 3 + 2(n-1), where n should be more than 1. In order for it to become a sequence, it should contain more than one term.

Therefore, it is correct to appropriate an explicit equation and domain for an arithmetic sequence with a first term of 3 and a second term of 5 to be: n = 3 + 2(n − 1); all integers where n ≥ 1

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Answer:

-3c

Step-by-step explanation:

During photosynthesis, what is the path or flow of energy among biotic and abiotic parts of an ecosystem?

Answer:

-3c

Step-by-step explanation:

c+-4c+10+-10=  c+-4c= -3c

By solving an exponential equation, we can see that the investment will be doubled after 10.6 years.

The investment can be modeled by the exponential equation:

P(x) = A*(1 + 6.75%/100%)^x

Where A is the initial value of the investment (the amount invested).

We can simplify this to get:

P(x) = A*(1 + 0.0675)^x

The investment will be doubled when:

2*A = A*(1 + 0.0675)^x

We want to solve this for x.

2 = (1 + 0.0675)^x

2 = (1.0675)^x

If we apply the natural logarithm in both sides:

ln(2) = ln((1.0675)^x)

ln(2) = x*ln(1.0675)

ln(2)/ln(1.0675) = x

10.6 = x

The investment will be doubled after 10.6 years.

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Answer::b.

Step-by-step explanation: