1. What is the expression for the perimeter of the entire gardening area based on Lisa’s measurements?

1. What Is The Expression For The Perimeter Of The Entire Gardening Area Based On Lisas Measurements?

Answers

Answer 1

The expression for the perimeter of the gardening area is 10x+16

What is perimeter?

A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length. The perimeter of a circle or an ellipse is called its circumference. Calculating the perimeter has several practical applications.

The perimeter of the garden will be the sum of all the sides of the garden.

left side = x+3+x = 2x+3

right side = x+3x+x =2x+3

top side = x+3+x+3+x = 3x+6

bottom side = 3x+6

therefore this shot the garden as a rectangular shape.

The perimeter of a rectangle = 2(L+B)

= 2((2x+3)+3x+6)

= 2( 5x+8)

therefore the expression that best represents the perimeter of the garden is 10x+16

learn more about perimeter from

https://brainly.com/question/19819849

#SPJ1


Related Questions

An airplane rises at an angle of 12 degrees with the ground. About how high, in feet will the plane be above the ground when it has traveled 500 yards fromt he airport horizontally? Round your answer to the nearest foot.

Answers

So you do both 500 x 12 and then it will give you6000

Diane is filling a candle order for a wedding. She needs 6 large arrangements and 13 small arrangements .The large arrangements each contain 25 candles. The small arrangements each contain 12 candles. How many candles does diane need in all?

Answers

Answer:

406 candles in all.

Step-by-step explanation:

She needs 6 large arrangements with 25 candles in each arrangement.

Multiply 25 and 6 to find how much candles for all large arrangements combined.

25*6=150

She also needs 13 small arrangements with 12 candles in each arrangement.

Multiply 13 and 12 to find how much candles for all the small arrangements combined.

13*12=156

Add the answers together to find how many candles in all.

156+150=406.

She needs 406 candles in all.

Hope this helps!

Answer:

306

Step-by-step explanation:

First we find the number of candles needed for each size of arrangement.

Large Arrangements:

6 large arrangements with 25 candles each:

25 × 6 = 150

Small Arrangements:

13 small arrangements with 12 candles each:

13 × 12 = 156

Now we add the results above to find a grand total:

total = 150 + 156 = 306

Wen Sam got a puppy from the shelter, it weighed 20.5Ibs. The puppy gain%30 of its original weight in the first month that Sam had him. How much did the puppy weight after the first month?

Answers

The weight of the puppy after the first month as described is; 26.65lbs.

What is the weight of the puppy?

Since, it follows from the task content that the initial weight of the puppy is; 20.5lbs and it gained 30% of this after 1 month, it follows that the weight of the puppy after one month is;

Weight = 20.5lbs × 130% = 26.65lbs.

Read more on percentages;

https://brainly.com/question/16865197

#SPJ1

In order to determine an interval for the mean of a population with unknown standard deviation, a sample of 24 items is selected. The mean of the sample is determined to be 23. The number of degrees of freedom for reading the t value is _____. Group of answer choices 21 22 23 24

Answers

If the sample size of population is 24 then the number of degrees of freedom for reading the t  value is 23 which is option c.

Given sample size of 24,mean 23.

We have to determine the number of degrees of freedom which will be used to find the critical values of t.

Degree of freedom is the number of values in the final calculation of a statistic that are free to vary means that can change their values in the formula of calculating t.

t=(X-μ)/s/[tex]\sqrt{n}[/tex]

where X is sample mean ,

μ is hypothsised population mean

s is sample standard deviation

n is sample size.

Degree of freedom=n-1

In this question n is 24 so the degree of freedom =24-1=23.

Hence the number of degrees of freedom for reading the t value is 23.

Learn more about degree of freedom at https://brainly.com/question/17305237

#SPJ4

PLEASE HELP!!!!
Determine if the conclusion is valid. Give a thorough explanation of your answer.
D
B
Given: AB || DC, AD || BC, AB BC
Conclusion: ABCD is a rhombus.

Answers

Answer: Correct

Step-by-step explanation:

The conclusion is valid. Since [tex]\overline{AB} \parallel \overline{DC}[/tex] and [tex]\overline{AD} \parallel \overline{BC}[/tex], we know that ABCD is a parallelogram because it has two pairs of parallel sides. Also, since [tex]\overline{AB} \cong \overline{BC}[/tex], we know that ABCD is a parallelogram with a pair of consecutive congruent sides, making it a rhombus.

Based on the polynomial remainder theorem, what is the value of the function when x=−5?

f(x)=x^4+12x^3+30x^2−12x+70

Answers

Answer:

5.

Step-by-step explanation:

f(x)=x^4+12x^3+30x^2−12x+70

The remainder theorem says that f(a)  is the value of f(x) when f(x) is divided by (x - a).

So when a = -5 f(a) will be 5.

Answer is 5.

Make w subject of formula
C=(4+w)/(w+3)

Answers

Answer:

Step by Step Solution

More Icon

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

c-((4+w)/(w+3))=0

STEP

1

:

4 + w

Simplify —————

w + 3

Equation at the end of step

1

:

(w + 4)

c - ——————— = 0

w + 3

STEP

2

:

Rewriting the whole as an Equivalent Fraction

2.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using (w+3) as the denominator :

c c • (w + 3)

c = — = ———————————

1 (w + 3)

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

c • (w+3) - ((w+4)) cw + 3c - w - 4

——————————————————— = ———————————————

1 • (w+3) 1 • (w + 3)

Equation at the end of step

2

:

cw + 3c - w - 4

——————————————— = 0

w + 3

STEP

3

:

When a fraction equals zero :

3.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

cw+3c-w-4

————————— • w+3 = 0 • w+3

(w+3)

Now, on the left hand side, the w+3 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

cw+3c-w-4 = 0

Solving a Single Variable Equation:

3.2 Solve cw+3cw-4 = 0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

We shall not handle this type of equations at this time.

Answer:

w = (4 - 3C)/(C - 1).

Step-by-step explanation:

C=(4+w)/(w+3)

Multiply both sides of the formula by  w+3:-

C(w + 3) = 4 + w

Cw + 3C = 4 + w

Cw - w = 4 - 3C

w(C - 1) = 4 - 3C

w = (4 - 3C)/(C - 1).

please help solve for n. 5/15 = n/21 a. n = 35 b. n = 7 c. n = 5 d. n = 90

Answers

Answer:

  b.  n = 7

Step-by-step explanation:

You want to solve the proportion ...

  5/15 = n/21

This is most easily done by multiplying by the inverse of the coefficient of the variable:

  (21/1)(5/15) = (21/1)(n/21)

  7 = n . . . . . . . . . simplify

__

Additional comment

The math is a little easier if you simplify 5/15 to 1/3. Then, n = 21/3 = 7.

Can some please help

Answers

Number of rooms left excluding a quarter of 140 is: 105 rooms.

What is a Quarter of a Number?

A quarter is one-fourth. A quarter of a number is therefore, one-fourth of that number or 1/4 part of the number.

Therefore, number of rooms cleaned = 1/4(140) = 35.

A quarter of the 140 rooms is: 35.

Number of rooms left for cleaning in the afternoon = 140 - 35

Number of rooms left for cleaning in the afternoon = 105 rooms.

Learn more about a quarter on:

https://brainly.com/question/334801

#SPJ1

A family is having a pool built in their backyard. If their yard is rectangular and measures 10x by 10x and the pool is circular with a radius of 2x how much of the yard will be left over after the pool is built

Answers

Answer:

[tex]100x^2-4\pi x^2[/tex]

Also can be said as:

[tex]4x^2(25-\pi )[/tex]

Step-by-step explanation:

The scenario:

The question is asking you, "how much is left over."

In this scenario, you're going to have to subtract the area of the pool (P) from the total area of the backyard (B), which will leave you with the remaining area of the backyard (x).

This means your equation to solve this question is:

[tex]x=B-P[/tex]

Step 1:

The value of B is the area of the backyard.

We are told that the backyard is a rectangular shape. So, we can use the formula of finding the area of a rectangle.

The formula is [tex]B=L*W[/tex], where L is the length and W is the width.

Both the length and width are 10x, so we must plug that into this equation.

We end up getting:

[tex]B=10x*10x[/tex]

Which can be simplified to:

[tex]B=100x^2[/tex]

Step 2:

The value of P is the area of the pool.

The pool is a circular shape. So, to get the area of it, we must use the formula of finding the area of a circle.

The formula is [tex]P=\pi r^2[/tex], where r is the radius.

Plugging in the radius of 2x, we get:

[tex]P=\pi (2x)^2[/tex]

By solving this out, we end up with:

[tex]P=4\pi x^2[/tex]

Step 3:

From the scenario, we have the equation:
[tex]x=B-P[/tex]

And from steps 1 and 2, we have the values:

[tex]B=100x^2[/tex] and [tex]P=4\pi x^2[/tex]

Now we just plug those values in to get:

[tex]x=100x^2-4\pi x^2[/tex]

And finally, the amount of the backyard remaining is:

[tex]100x^2-4\pi x^2[/tex]

Different format:

This answer may be simplified to:

[tex]4x^2(25-\pi )[/tex]

Which of the following matches the graph of f (x) = 2(x + 1)2(x – 1)(x – 2)?

Answers

The graph that matches the function f(x) = 2(x – 1)2(x + 1)(x + 2) is shown in the attached file

How to draw the graph of a Polynomial?

A function assigns the value of each element of one set to the other specific element of another set.

We want to draw the graph of the function f(x) = 2(x – 1)2(x + 1)(x + 2). Using relevant coordinates input into the function and the generated output, the graph of the given function is as attached below.

Read more about Graph of polynomial at; https://brainly.com/question/14625910

#SPJ1

A cruise line ship left Port A and traveled 90 miles due west and then 400 miles due north. At this point, the ship docked at Port B What is the shortest distance between Port A and Port B?

Answers

Answer:

410 Miles

Step-by-step explanation:

Please refer to the photo attached. (Apologies for the legitimately terrible drawing)

The Shortest Distance between any 2 points is the distance thats connects the 2 points directly.

In this case, we can use Pythgoras's Theorem to find AB which is the shortest distance between A and B.

By Pythagoras's Theorem,

[tex] {c}^{2} = {a}^{2} + {b}^{2} \\ {ab}^{2} = {ac}^{2} + {cb}^{2} \\ {ab}^{2} = {90}^{2} + {400}^{2} \\ab = \sqrt{ {90}^{2} + {400}^{2} } \\ = 410 \: miles[/tex]

The sixth grade band students are selling magazines to raise money for new instruments. As a reward for selling, the students earn points to spend on prizes. Each student gets 25 points to start with, and then they earn an additional 5 points for each magazine they sell. If m represents the number of magazines a student sells, write an expression to represent the total number of points the student has.

WRITER

Answers

Answer:

okay he's saying that each student gets 25 points to start with and then they get five more like 25 / 25 * 5 or like 25 + 5 or 25 - 5 like represent those numbers and like get the number or something like that

what is the area for the green square?​

Answers

The answer is 900(?) ig

What do these values indicate about a sample mean absolute deviation being used as an estimator of the mean absolute deviation of a population?

Answers

Because the sample statistic centers around a different value than the population parameter, the sample mean absolute deviation is a biased estimator of the population mean absolute deviation.

Reason Behind a Biased Estimator

The expected value (average) of all the sample absolute deviations must match the population absolute deviation in order for the absolute deviation to function as an unbiased estimator. It does not, however, which makes the values of sample mean absolute deviation behave as a  biased estimator.

Brief Description of Sample Mean Absolute Deviation

The average of the absolute deviations from a central point makes up the average absolute deviation of a data collection. It is a statistical summary of statistical variability or dispersion.

Learn more about biased estimator here:

https://brainly.com/question/26415101

#SPJ4

I know only one answer whats the other one help me image-

Answers

Answer:

A. 4(4a + 18)

B. 8(2a + 9)

Step-by-step explanation:

We know that :

16a = 4×4×a

72 = 4×18

Then

16a + 72 = 4×(4a) + 4×(18)

              = 4 × (4a + 18)

On the other hand,

16a = 8×2×a

72 = 8×9

Then

16a + 72 = 8×(2a) + 8×(9)

              = 8 × (2a + 9)

In a 10-year period, Bakersfield, CA population grew from 558,000 to 718,000. What is the percentage of increase? (Round to the nearest tenth of a percent)

Answers

The percent increase to the nearest tenth is 22.2%

Calculating percent increase

Percent increase is the percent it takes from a value to change from its initial value

Given the following

Initial value = 558,000

Final value = 718,000.

Determine the percent increase

% increase = (718,000-558000)/718,000 * 100

% increase = 160000/718000 * 100

% increase = 22.2%

Hence the percent increase to the nearest tenth is 22.2%

Learn more on percent increase here: https://brainly.com/question/11360390

#SPJ1

From Andys house to Billys hometown you can travel by 3 roads. And to get from Billys hometown to Willies's house you can travel by 5 roads. How many possible wats are there to travel from andys house to willies house?

Answers

3 roada andy to billy

5 road billy to willies

3×5 =15 it's the answer 15

8.8÷4=8, point, 8, divided by, 4, equals

\text{ tenths}\div 4 tenths÷4start text, space, t, e, n, t, h, s, end text, divided by, 4

8.8 \div 4 =8.8÷4=8, point, 8, divided by, 4, equals

\text{ tenths} tenthsstart text, space, t, e, n, t, h, s, end text

8.8 \div 4 =8.8÷4=8, point, 8, divided by, 4, equals

Answers

The results of the given task 8.8 ÷ 4 is 2.2.

Division of Decimal

8.8 ÷ 4

= 2.2

Therefore, 8.8 ÷ 4 = 2.2

Learn more about division:

https://brainly.com/question/1622425

#SPJ1

Line a is purpendicular to line b. if the slope of line a is 7 than what is the slope of line b

Answers

The slope of the perpendicular line b is -1/7 if the slope of the perpendicular line a is 7.

According to the question,

Line 'a' is perpendicular to the line 'b'. If the slope of the line 'a' is 7.

The condition of slopes if two lines are perpendicular m₁ m₂ = -1

(7)(m₂) = -1

   m₂ = -1/7

Hence, the slope of the perpendicular line b is -1/7 if the slope of the perpendicular line a is 7.  

Learn more about perpendicular lines here

https://brainly.com/question/2505127

#SPJ4

You have learned about the six trigonometric functions, their definitions, how to use them, and how to represent them graphically. The sine, cosine, and tangent trigonometric functions can be paired with their reciprocal functions, cosecant, secant, and cotangent, respectively. Think about how each function is related to its reciprocal function.

How are the graphs of the reciprocal functions related to their corresponding original functions? What happens to the graphs of the reciprocal functions as x approaches the zeros of the original functions? Describe how you would teach friends with different learning styles (visual-spatial, aural-auditory, verbal-linguistic, physical-bodily-kinesthetic, logical-mathematical, social-interpersonal, and solitary-intrapersonal) how to graph the reciprocal functions.

Answers

The graphs of the reciprocal functions are related to their corresponding original functions based on the information illustrated below.

What are trigonometric functions?

It should be noted that the trigonometric functions are the real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

There are six functions of an angle. They are sine (sin), cosine (cos), tangent (tan), cotangent, secant, and cosecant (csc).

It should be noted that all the y-coordinates of a reciprocal function will be the reciprocals of the y-coordinates of the original function. Then, the graph of a reciprocal function has a vertical asymptote at each zero of the original function. For example, y=arcsinx reflects against y=sinx.

Learn more about trigonometry on:

https://brainly.com/question/24349828

#SPJ1

Find the measure of the arc or angle indicated by the question mark.

Answers

Answer:

FP is 70 degrees 35 times 2 so PD is 180 half a turn minus 70 = 110 degrees

Step-by-step explanation:

The average rainfall in inches in miami from january to may is 1.61, 2.24, 2.99 3.15 5.35 and 9.68 while it is 2.24 2.8 3.03 2.05 2.09 and 6.69 during the same period in tampa. which city gets more rain and how much more.

Answers

Miami gets 6.12 more inches of rainfall more than Tampa.

What is average rainfall?

The annual amount of precipitation that we anticipate is known as normal or typical rainfall (in a given area).

It is calculated and set by estimating the average (mean) of precipitation that has been observed in a region over a long period of time ( at least 30 years). The total amount of daily precipitation in a year is referred to as annual precipitation.

Calculation for the average rainfall-

The average rainfall (in inches) in Miami for 5 months are-

1.61, 2.24, 2.99, 3.15, 5.35, and 9.68,

Thus, the total rainfall in Miami in 5 months,

Total average rainfall = 1.61 +2.24 +2.99 +3.15 +5.35 + 9.68 = 25.02 inches

Similarly,

The average rainfall (in inches) in Tampa for 5 months are-

2.24, 2.8, 3.03, 2.05, 2.09, and 6.69.

Thus, the total rainfall in Tampa in 5 months,

Total average rainfall = 2.24 +2.8 +3.03 + 2.05 + 2.09 + 6.69 = 18.9 inches.

The difference between the total rainfall in Miami and Tampa is

25.02 - 18.9 = 6.12 inches

The total rainfall in Miami is 25.02 inches while the total rainfall in Tampa in the same time period is 18.9 inches.

Therefore, Miami gets 6.12 inches more rainfall during the same time period.

To know more about the annual rainfall graphs​, here

https://brainly.com/question/26690779

#SPJ4

Which two statements would produce a tautology? (p q) (p q) (p q) (p q) q (p q) (p q) p

Answers

(p p) would produce Tautology.

Tautology:

It is needless repetition of an idea, statement, or word Rhetorical repetition, tautology ('always and for ever'), banal metaphor, and short paragraphs are part of the jargon.— Philip Howard. b : an instance of such repetition The phrase "a beginner who has just started" is a tautology.

A tautology is an expression or phrase that says the same thing twice, just in a different way. For this reason, tautology is usually undesirable, as it can make you sound wordier than you need to be and make you appear foolish.

Learn more about Tautology on:

https://brainly.com/question/14523081

#SPJ4

which of the following best describes this graph

Answers

x² - 4x + 4 is the graphed parabola, so the correct option is D.

Which equation is the graphed one?

On the graph, we can see a parabola that opens upwards (then the leading coefficient is positive), and has a vertex at the point (2, 0).

Also, we can see that the y-intercept is y = 4, that means that the constant term of the parabola is 4.

The only option with a constant term equal to 4 is the last option:

y = (x - 2)*(x - 2) = x² - 4x + 4

So that is the graphed parabola.

If you want to learn more about parabolas:

https://brainly.com/question/4061870

#SPJ1

Micheal measured the distance around the circler swimming pool as apppoximly 108 feet which of the following represents the approximates radius of the circular swimming pool

Answers

The radius of the circular swimming pool is 17.20 feet.

What is the radius?

The distance round the  circular swimming pool is the circumference of the circle.

Radius = circumference / (pi x 2)

108 / (3.14 x2)

108 / 6.28 = 17.20 feet

To learn more about how to determine the circumference of a circle, please check: https://brainly.com/question/14351152

#SPJ1

I don’t get this either please save me from this ahhhhhh

Answers

Answer:

y=

[tex] - \frac{x {}^{2} + 8x + 16 }{2} - 7[/tex]

Step-by-step explanation:

calculate the product, use (a+b)^2=a^2+2ab+b^2

Quick algebra 1 question for 50 points!

Only answer if you know the answer, quick shout-out to Dinofish32, tysm for the help!

Scenario 1: Cameron works at a local grocery store after school. He is paid $8 for each hour he works.

Scenario 2: At a local bakery, one box of donuts costs $5. Two boxes of donuts cost $10.

Consider the two scenarios given above. Can you write an equation to represent each situation? What would the graphs of these equations look like? Can you think of a situation that would result in a similar equation?

Describe a scenario that would result in an equation similar to the equations for Scenarios 1 and 2. Post your scenario and the corresponding equation to the discussions area.

Answers

Answer:

Scenario 1: Cameron works at a local grocery store after school. He is paid $8 for each hour(h) he works. And ammount of money can be (m)

considering theres no like first hour pay or something then it would be

Equation: m = 8h

Scenario 2: At a local bakery, one box of doughnuts(b) costs $5(c). Two boxes of doughnuts cost $10.

Equation: c = 5b where b is the ammount of doughnut boxes and c is the cost

Scenario 1a: Jim goes to the gym for 10 hours(h) It costed him $20(c) for those 10 hours.

Equation:  c = 2h

Scenario 1b: Kayla goes to a for a ride on her bike and traveled 15 miles(m) and was out for 30 minutes. (t)

Equation: t = 2m

How do you find the interior angle of a triangle given the external angle of 125°

Answers

Answer:

<x = 55 degrees

<y = 55 degrees

<z = 70 degrees

Step-by-step explanation:

The 125 degree angle and x are supplementary since they form a straight line, which means that their degrees add up to 180. To find x, the interior angle, we must subtract 125 from 180.

180 - 125 = 55

Angle x is 55 degrees. Since the sides opposite x and y are marked with lines, they are congruent, and since the sides are congruent, the angles must be, too. So, y is also 55 degrees.

Finally, the angles in any triangle add up to 180 degrees. To find z, we must subtract the values of x and y from 180.

180 - 55 - 55 = 70, so z is 70 degrees.

Brainliest, please :)

❄Hi there,

the external angle & the interior angle form a linear pair, which means, if you add these angles together, you'll arrive at 180°.

Using this knowledge let's set up an equation and find x:

[tex]\triangleright \ \sf{125+x=180}[/tex]. We let x be the desired angle.

[tex]\triangleright \ \sf{x=180-125=55}[/tex]

So the interior angle is [tex]\angle\sf{55}\textdegree[/tex].

8. What do you know about triangles PDX and triangle CRX? Justify your answer.

Answers

If segment PD is parallel to segment CR then triangle PDX is similar to triangle CRX, due to angle PXD and angle CXR being congruent by the vertical angle theorem, and angle PDX and angle CRX being congruent by the alternate interior angle theorem, these 2 triangles are similar by the A.A similarity postulate.

Answer:

The triangles are Congruent for the same reason as the answer above

Step-by-step explanation:

Other Questions
The Lyman series of emission lines of the hydrogen atoms are those for which nf = 1. a) determine the region of the electromagnetic spectrum in which the lines of the Lyman series are observed. b) Calculate the wavelengths of the first three lines in the Lyman series-those for which ni = 2,3,and 4. Please show all work A car (1600kg) is moving at 5.0 m/s on a mountainside road. The cars elevation is 4.5 m from the valley floor. What is the cars gravitational potential energy? J Complete the table.1.2.3.DeductibleAmount$500250700Numberof Co-Paymentsat $10Each203526Amountof Co-PaymentsAmountSubjectto Co-Insurance$20,00025,50084,000InsuredCo-InsuranceRate20%30%25%Amountof Co-InsuranceTotal Paidby Insured If 6x - 7 - 2x + 4 = 13, what is the value of 10 - 2x? Please help me with my class work what factors influence range of motion of a joint? 9, 15, 25,...Find the 8th term. How many logs worth selling do pap and guck find How many grams of ammonia are produced when 28 grams of nitrogen gas are reacted with excess hydrogen gas? In an experiment with a bag of marbles, P(green) = three fourths. Interpret the likelihood of choosing a green marble. Likely Unlikely Equally likely and unlikely This value is not possible to represent probability of a chance event. The best words for writing informal letters Please help, thank you!A set of eight cards were labeled with A, D, D, I, T, I, O, N. What is the sample space for choosing one card? S = {A, D, D, I, I, N, O, T} S = {A, D, I, T, O, N} S = {A, I, O} S = {D, I} Within Mr. Kralers dialogue, what ideas justify aspects of Mr. Franks character. Find the decimal equivalent to 415. How do I solve 604 times 33 What are the symbols used in editorial cartooning? How many times can 25 go into 2450 ? In 1950 there were fewer than one billion children (aged 0-14) in the world. By 2000 there were almost twobillion. How many do UN experts think there will be in 2100? What other significant changes do you notice between 1822 and 1914 on the maps? explain why the changes are significant. Riley makes a mistake in step 2 while doing her homework. What was her mistake? startfraction x over x squared minus 5 x + 6 endfraction + startfraction x over x + 3 endfraction.