Mathematics Middle School

A trapezoid has a height of 8 cm and bases with lengths of 14 cm and 8 cm. Tina says the area of the trapezoid is 176 cm2.

Find her error, and correct the error.

Tina did not multiply by _ . The correct area is _ cm2.

Answers

Answer 1

Answer:

Step-by-step explanation:

Let's do this properly:

                                 

Area of trapezoid =  average length times height.

Here,

Area = (1/2)(8 cm + 14 cm)(8 cm), or

         = (11 cm)(8 cm) = 88 cm^2

It appears that Tina forgot to divide the sum of 14 cm and 8 cm by 2.  Thus, her answer is twice as large as it should be.

Answer 2
what this guy ^^ said was right but not entirely

Related Questions

15 POINTS!!!!!!!!!!!!!

Answers

Answer:

35

87.5

Step-by-step explanation:

Hihiihihihiihihihihihiihihi hihihihiijih

There are approximately 3,000 bass in a lake. The population grows at a rate of 2% per year. Round answers to the nearest tenth.
From Year 1 to Year 4, the average rate of change of the population was about 62.4 bass per year.

From Year 5 to Year 8, the average rate of change of the population was about 67.6 bass per year.

The rate of change increased by about _____ bass per a year.

(Please fill in the blank with the correct information.

Answers

Answer:

4.8

Step-by-step explanation:

4.8

The answer is 4.8 (this app is making me put more)

The table shows the monthly rainfall at a measuring station. What is the mean monthly rainfall? Round your answer to the nearest thousandth.

The mean monthly rainfall is ___inches.

Answers

Answer:

The mean monthly rainfall is 3.245 inches.

Step-by-step explanation:

The first step in answering this question is to add all of the months together. This gives us; 38.94.

The second step is to divide the added months by 12 because there are 12 months, and 12 numbers that we added together.

This gives us 3.245.

So, the answer is going to be The mean monthly rainfall is 3.245 inches.

Have a good day and good luck!

The mean monthly rainfall is 3.245 inches.

What is Mean?

Mean of a set of data is defined as the average of all the values. It gives the exact middle point of the data set.

Given is a table which shows the monthly rainfall at a measuring station.

Mean of a set of data = Sum of the data vales / Total number of values.

Here,

Total number of data points = 12

Sum of the data points = 2.22 + 1.51 + 1.86 + 2.06 + 3.48 + 4.57 + 3.27 + 5.40 + 5.45 + 4.34 + 2.64 + 2.14

= 38.94

Mean = 38.94 / 12 = 3.245 inches

Hence the mean monthly rainfall is 3.245 inches.

Learn more about Mean here :

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kims family picks 2 1/3 pounds of blueberries in 1/4 hours. at this rate, how many blueberries can they pick per hour

Answers

Answer:

9 1/3

Step-by-step explanation:

You just multiply the amount of berries picked by 4, since its 1/4.

Answer:

about ratio equivalence as they solve ratio problems in real world contexts (6. ... ratio of 5 miles to 2 hours corresponds to a rate of 2.5 miles per hour, ... pounds of rice should each person get? ... and ratios to model 5 miles/2 hours as a quantity 2.5 mph. ... I can't say there are 3 times as many boys as girls.

Step-by-step explanation:

Write the equation of the line in slope-intercept form using y=mx+b​

Answers

Answer:

y= -5x + 2

Step-by-step explanation:

the slope is heading downwards, and down five units for each one across (hence m=5) and the y-intercept is 2 (hence the 2)

The double dot plots show the average wait times in minutes for two popular rides at an amusement park.

Which ride typically has a longer wait time?

A. Rocket Blast

B. Topsy Turvy

C. No inference can be made from this graph.

D. The wait times are the same for both graphs.

Answers

D I think is the answe

Answer:

Rocket Blast = 20 = 1 25 = 2 30 = 4 35= 2 40 = 1 = 10

15 = 2 20 = 2 25 = 3 30 = 2 35 = 2 = 11

Step-by-step explanation:

Can someone please help me?

Answers

Answer:

The answwrr is 6/20

Step-by-step explanation:

6/20 so that’s the answer

Please answer the questions on the Photo

Answers

1. 4w = 25
2. Each circle would weigh 6.25
The answers are 1. 5
and 2. 3.25 hope this helped!!

‼️15 points!‼️May someone help me with these 4 questions please!

Answers

Answer:

I'll explain you number one

3

Step-by-step explanation:

You first subtract the single number (1) subtract to 10 which gives you 9, then you will divide 3 from 9 which gives you 3

Sorry I couldn't help you with there other ones.

Sponsors:

5s + 10 = 200

You need to get rid of 10 first, you do this by subtracting it by 10, you also subtract 10 to 200

5s = 190

Now you need to get rid of 5 that is attached to the variable, you must divide 5 since it is multiplying, also dividing 5 to 190

s = 38

So it would be 38 sponsors



Comic books:

4c + 6 ≤ 20

Take away 6 by subtracting, also subtracting 6 to 20

4c ≤ 14

You then have to divide 4 to the variable, also dividing 4 to 14

c ≤ 3.5

Now since you can’t get half of a comic book, the greatest amount of comic books he can buy is 3.

3 comic books



Value of x:

3x + 1 = 10

Take away 1 by subtracting 1, also subtracting 1 to 10

3x = 9

Divide 3 to the variable, dividing 3 to 9 as well

x = 3



Value of y:

4y + 6 ≥ 18

Subtract 6 to 6 and 18

4y ≥ 12

Divide 4 to both sides

y ≥ 3 or y is greater than or equal to 3 (in case you can’t see the symbol)

Hope this helps! :)




i need healpp pleaseeeee

Answers

Answer:

I don't get it...

Step-by-step explanation:

Please elaborate on the question...

I don’t really understand

Use a verbal statement to describe the solution graphed below.
All real numbers greater than 0
All real numbers less than 0
All real numbers greater than or equal to 0
All real numbers less than or equal to 0

Answers

Answer:

All real numbers less than or equal to 0

Step-by-step explanation:

Since the dot is filled in and on the 0, that means it includes the 0, and the arrow points to everything to the left, and left is smaller/negative.

plz plz huty The chart below shows Mrs. Thompson's grocery bill. What is the average amount Mrs. Thompson spent on groceries?
A. $52
B. $62
C. $72
D. $310

Answers

The answer is $62.

Explanation: you need to add all the total amounts which is $310 and then divide it by the amount of weeks which is 5 to find the average

47+86+68+51+58 = 310
310 divided by 5 = 62

What is the area of the following circle?
[Shoutout: scsb17hm]

153.86 m2
38.47 m2
21.98 m2
10.99 m2

Answers

Answer:

38.47 m2

Step-by-step explanation:

Area = 3.5 x 3.5 x 3.14

Area = 12.25 x 3.14

Area = 38.465 --> 38.47m2

Hope that helps!

38.47 hope this helps!!! have a good day.


PLEASE HELP ME OUT!!

Name a pair of adjacent angles in this figure.

Which of these is a pair of adjacent angles?

Please explain how you found the pair of adjacent angles since I don’t know how to find them yet...

Answers

Answer:

Theres only one pair of adjacent angles, JOH and KOL

Step-by-step explanation:

I think...

JOH AND KOL☺️ I hope this helps

Miss Jackson is comparing her students' scores on the science test to the scores on the math test. She has recorded for each test on the dot plots shown below. Which of the following statements is true about the data?

A. The mean absolute deviation of the math scores is greater than of the science scores; therefore, the math scores are more spread out than the science score.
B. The mean absolute deviation of the science scores is greater than of the math scores; therefore, the science scores are more spread out than the math score.
C. The mean absolute deviation of the science scores is greater than of the math scores; therefore, the science scores are higher than the math score.
D. The mean absolute deviation of the math scores is greater than of the science scores; therefore, the math scores are higher than the science score.

Answers

Answer:

The mean absolute deviation of the science scored is greater than that on the math scores therefor the science scored are more spread out than the math scores

Step-by-step explanation:

Which plate forms a boundary with the African Plate?

A. Pacific
B. South American
C. Nazca
D. Philippine

Answers

Answer:

B. South American

Step-by-step explanation:

The plate which forms a boundary of the African plate is Antarctic Eurasian and South American. According to various scientific research and evidences, the world is divided into seven techtonic plates out of which the African plate is the largest plate.

The South American plate forms a boundary with the African Plate.

Which plate forms the boundary?

The plate which forms a boundary of the African plate is Antarctic Eurasian and South American. According to various scientific research and evidence, the world is divided into seven tectonic plates out of which the African plate is the largest plate.

Therefore the South American plate forms a boundary with the African Plate.

To know more about tectonic plates follow

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plzz help asap(plz don't givehelpless answer)

Answers

Answer: 1,000 x 20,000 = 20,000,000

1,200 x 15,000 = 18,000,000

20,000,000 - 18,000,000 = 2,000,000

First u need to find what percentage each person get in commission.
$1000 divided by $20000 is 0.05 which is 5%

$1200 divided by $15000 is 0.08 which is 8%
So julissa has a commission rate of 5% and destiny has a commission rate of 8%
So the difference is 3%

Roberta decided to go shopping,

Answers

Is this the whole question? Or is there more to it?

help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

WITH WHATTTTTTTTTTTTT
Could you make the picture a bit clearer ?

FAST HELP ASAP!!ANSWER USING GIVEN FRACTIONS!!FIRST CORRECT ANSWER WILL GET BRAINLIEST!!

Answers

Answer:

5 is 1/15

6 is 1/45

7 is 2/45

8 is 4/45

Step-by-step explanation:

hope this helps :)

Could someone please help me with this question

Answers

Answer:

10 units

Step-by-step explanation:

Area of a triangle is [tex]\frac{h*b}{2}[/tex]= Area

where h is the height, and b is the base

We can substitute these values into the area equation and get:

[tex]\frac{x*10}{2} = 50[/tex]

Multiply both sides by 2:

x * 10 = 100

Divide both sides by 10:

x = 10

The missing side is 10 units long

2 wjshsgshe shsbshs shave

A bike wheel has a radius of 12 inches. How far will someone travel in 500 rotations? About how far is this in feet? Round to the nearest foot.

Answers

Answer:

3142 feet

Step-by-step explanation:

first, find the circumference of the wheel.

approx 75.4

every one rotation you travel approximately 75.4 inches

75.4 x 500 =37,700

37,700/12 = feet traveled

3141.6... feet

rounded = 3142

A box of 14 cookies costs $8. What is the cost of 1 cookie?

Answers

The answer is $1.75, im pretty sure

Answer:

A cookie costs $4/7

Step-by-step explanation:

Let's write an eqution in which X represents the cost of a cookie

14x=8

Now divide both sides by 14

[tex]x=\frac{8}{14}[/tex]

Now simplify by 2

[tex]x=\frac{4}{7}[/tex]

So a cookie costs $4/7

don't know what to put here pls just check the photo

Answers

i think its C D and F
It has to be D,C and F

geometry I need help

Answers

Answer:

145

Step-by-step explanation:

Angle 4 and 5 are the same.

Which means that angle 3 and 6 are the same.

A straight line has an angle of 180 degrees in total.

This means that we have to subtract 35 from 180.

This gives us 145.

So, the missing angle is going to be 145 degrees.

*also, 1, 4, 5, and 8 are the same angle.

**2, 3, 6, 7 are also the same angle.

***I just remember learning about this last year, don't remember what there called tho.

Answer:145

Step-by-step explanation:

look at angle 4 and do 180-35 which is 145 and it has the same degree with angle 6

HELPPP The question is in the picture

Answers

Answer:

(-2,1)         (-1,-1)          (1,2)

Step-by-step explanation:

Give brainlest

(-2, 1) (-1, -1) (1, 2)

PLEASE HELP ILL GOVE BRAINLIEST IF ITS GOOD

Answers

2nd option is the correct one!

hope that helps

The answer is the second one

Solve equation

2x - 7x + 10 = -2

Answers

Answer:

x = 12/5 or 2 2/5

Step-by-step explanation:

Answer:

12/5

Step-by-step explanation:

2x-7x+10=-2  -5x+10=-2  -5x+10-10=-2-10  -5x=-12 x=12/5

Wanda made an estimate that the angle below was about 170 degrees.Why did her estimate not correctly describe the angle measurement?


A. that estimate is too large

B. that estimate is too small

C. because the measurement is smaller than 90 degrees

D. because the measurement is closer to 180 degrees than to 90 degrees

Answers

D. Because the measurement is closer to 180 degrees than to 90 degrees

Answer:

A. that estimate is too large

The angle is about 135°

help help help help = 49

Answers

12.25+12.25+12.25+12.25=49
sounds like you got it
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