3 years ago

A sphere has a radius of 15 m. If the radius is divided by 5, what is the effect on the surface area?

1 answer:

5 0

The surface area is multiplied by 5.
The surface area is divided by 5.
The surface area is divided by 25.
The surface area is multiplied by 25.

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SOLVE x^4 − 15x^2 − 16 = 0 <br> What are the roots of the equation?

kakasveta [241]

Answer:

roots : 4, -4, i, -i

Step-by-step explanation:

This gets a bit tricky.

We have to substitude x^2 as u in this problem.

Now to rewrite x^4 − 15x^2 − 16 = 0 with u, we get

u^2 - 15u - 16 = 0

( u - 16) (u + 1)

U = 16

U = -1

<em>This is not the end of the problem. </em>

Now we have to substitute x^2 back to u.

x^2 = 16 --> we get the roots 4 and -4

x^2 = -1 --> we get the roots i and -i

tadah!

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1 year ago

Is 9090.9 a real, imaginary, or complex number

Rudiy27

Answer: Complex

Step-by-step explanation:

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2 years ago

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Evaluate A^2-B^2 for A=3 and B=-4.

MAXImum [283]

Answer:

Step-by-step explanation:

3^2 = 9

(-4)^2 = 16

16-9= 7

4 0

2 years ago

Which expression is equivalent to (8 a minus 3 b + 7) minus (2 a + b minus 4)? 6 a minus 2 b + 11 6 a minus 4 b + 3 6 a minus 2

bekas [8.4K]

This is how it turns out:

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2 years ago

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add the following fractions and simplify the answer if possible.on your answer sheet draw and color each scoop of ice cream base

Vinil7 [7]

9514 1404 393

Answer:

see attached

Step-by-step explanation:

Top down, left to right, the sums are ...

1/3 +3/6 = 2/6 +3/6 = 5/6 . . . pink

1 1/5 + 1 2/10 = 1 1/5 + 1 1/5 = (1 +1) +(1/5 +1/5) = 2 2/5 . . . green

2 2/6 +1 2/8 = 2 1/3 +1 1/4 = (2 +1) +(4/12 +3/12) = 3 7/12 . . . violet

1/7 +2/3 = 3/21 +14/21 = 17/21 . . . yellow

2 3/4 +2/6 = 2 9/12 +4/12 = 2 13/12 = 3 1/12 . . . brown

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2 years ago