Question

Please help solve this question. Thanks

Answer 1

Answer:

A = -y^2 + 18

y = 9 + (81 - x)^(1/2) and y =9 - (18 - x) ^(1/2)

Step-by-step explanation:

Given:

P = 2 ( l + w)

x = length and y = width

P = 2 (x + y)

36/2 = x + y

x + y = 18

x = 18 - y

Area:

A = x * y

A = (18 - y) * y

A = 18y - y^2

Using quadratic formula (solve for y):

y = 9 + (81 - x)^(1/2) and y =9 - (18 - x) ^(1/2)

//Not sure it's right.