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Debora [2.8K]
3 years ago
9

I don’t understand this at all help please

Mathematics
1 answer:
Talja [164]3 years ago
5 0

Answer:

225 km^2

Step-by-step explanation:

Area of a trapezoid: ((Base 1 + Base 2) x h) / 2

(11 + 19) x 15 / 2

= 225 km^2

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On a 40‐point test, Steve received an 80%. How many points did he receive on the test?
jarptica [38.1K]

Answer:

Steve got 32 points

Step-by-step explanation:

Take the total score and multiply by the percentage received

40 * 80%

Change to decimal form

40 * .80

32

Steve got 32 points

7 0
2 years ago
Find the volume V of the cone. Round your answer to the nearest tenth.
uranmaximum [27]
The volume of cone formula is 1/3 times pi times radius^2 times height. So in this case the formula which numbers substituted in would be 1/3 times pi times 8^2 times 12. The final answer would be 804.2477 and if rounded it would be 804.2 m^2
8 0
2 years ago
The size of a playground is 160 feet by 360 feet. A model is created that measures 4 inches by 9 inches. Is it a rate, ratio onl
Vera_Pavlovna [14]

Answer:

The model is made in a<u> 1:40 ratio </u>

Step-by-step explanation:

How many times is 4 multiplied to be equal to 160?

4(x) = 160

X = 160 / 4

<u>X = 40</u>

The proportion, rate, and ratio are almost the same.

They represent the correspondence between the parts and the whole since they all express a binary relationship between the quantities, that is, objects, people, tablespoons.

If the ratio is 1: 2 it could be read that for every 1 there are 2.

For example 1: 2 cups; For every cup of something there are 2 cups of something else.

In this case, 1:40; For every inch of the model, there are 40 feet in the playground.

3 0
3 years ago
5 + 8n = 7(-7 + 4n) -6
Luba_88 [7]

Answer:

n = 3

Step-by-step explanation:

Given

5 + 8n = 7(- 7 + 4n) - 6 ← distribute parenthesis on right side

5 + 8n = - 49 + 28n - 6 ( subtract 28n from both sides )

5 - 20n = - 55 ( subtract 5 from both sides )

- 20n = - 60 ( divide both sides by - 20 )

n = \frac{-60}{-20} = 3

6 0
2 years ago
What would a cd cost if it was originally $13 and had a tax of 6%?
Tasya [4]
$13 x 1.06 = $13.78
The CD costs $13.78 after the tax is added on.

Hope This Helps You!
Good Luck Studying :)
7 0
3 years ago
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