Asquare has an area of 81x square cm. what is the perimeter of the square ?

The perimeter of the square is

Step-by-step explanation:

step 1

Find the length side of the square

we know that

The area of a square is equal to

where

b is the length side of the square

we have

substitute and solve for b

square root both sides

step 2

Find the perimeter of the square

we know that

The perimeter of the square is equal to

we have

substitute

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

the answer would be c:   ax + b = ax + c

step-by-step explanation: