In the middle of gerald's rectangular backyard, there is an array of square concrete blocks. each concrete block has a side length of c feet. the width of the yard was 3 feet longer than than 6 times the length of one side of one concrete block. the area of the yard is found with the equation shown below.

a=84c^2+72c+15
which statement best describes the coefficient of c^2?

a. is correct

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

125 yards

step-by-step explanation:

i take 75 plus 50.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9