Asquare has side lengths of 9, which of the following is a correct formula for finding the area of a square? select all that apply. a=9^2 a=ï€(9^2) a= 9 . 9 a= 1/2 (9) (9+9) a= 1/2 (9) (9)

A.

C.

D.

Step-by-step explanation:

We have been given that a square has side lengths of 9. We are asked to choose the correct options that represent area of the given square.

We know that area of a square is square of its each side.

, where a represents each side of the square.

Upon looking at our given choices, we can see that option A is the correct choice as our given square has length of 9 and square of 9 is correct.

We can write area formula as:

Therefore, option C is correct choice as well.

Upon simplifying option D, we will get:

Therefore, option D is correct choice as well.

Upon simplifying option E, we will get:

Therefore, option E is not a correct choice.

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step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.