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kobusy [5.1K]
3 years ago
9

What is -a^-2 if a=-5

Mathematics
1 answer:
Leviafan [203]3 years ago
3 0
-a^{-2}=-(-5)^{-2}=-\left(\dfrac{1}{-5}\right)^2=-\dfrac{1}{25}
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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
The volume of a cylinder is 252pi cm^3 and its height is 7 cm
ser-zykov [4K]

Answer:

Step-by-step explanation:

volume= (pi)(radius^2)(h)

252(pi)=(pi)(radius^2)(7)

divide both sides by pi

252=(radius^2)(7)

divide both sides by 7

36=(radius^2)

square root each side

6=radius

5 0
3 years ago
Stuco wants to start a new project to help with trash removal. They need $15 to buy supplies at the local landfill and they char
LuckyWell [14K]

Answer:

$17,640

Step-by-step explanation:

Stuco wants to start a new project to help with trash removal. They need $15 to buy supplies at the local landfill and they charge 75 per pound. If the Senior Class collects 235 pounds of trash, the cost  is going to be $17,640.

235 ⋅ 75 = 17,625

17,625 + 15 = 17,640

Therefore, the answer is $17,640.

3 0
3 years ago
How are the triangles congruent?
e-lub [12.9K]

Answer:

<u>SSS</u>

Step-by-step explanation:

it means side side side and the lines represent their congruecny with the other triangle, meaning that the two line dash is equal to the other two line dash and the one line dash is equal to the other one line dash and you know the last side is the same with eachother because they are sharing that side of the triange

hope it helps have a great day

im not having a great day i got 101 notifications. guess what they were. A MODERATOR DELETED <u><em>ALL</em></u> MY ANSWERS AND NOW I HAD TO START OVER I HAD 23 BRAINLIESTS AND 2983 POINTS AND NOW I HAVE -76 POINTS

5 0
2 years ago
Read 2 more answers
Factor - 3y(2y + 3) - 5(2y + 3)
avanturin [10]

Answer:

-(2y+3)×(3y+5)

Step-by-step explanation:

- 3y(2y + 3) - 5(2y + 3)

Factor out - (2y+3)

-(2y+3)×(3y+5)

4 0
3 years ago
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