D. 10
m<3 = 80 - (10) = 70
m<7 = 90 - (20) = 70
So the easiest way to solve this is to use the straight line provided .
180=90+61+x
180=151+x
29=x
Answer:
A(x) = 4x^2 + 330x + 4356
Step-by-step explanation:
width of park: x
length of park: 4x
width + path width = x + 66
length + path width = 4x + 66
area = (x + 66)(4x + 66)
area = 4x^2 + 66x + 264x + 4356
area = 4x^2 + 330x + 4356
A(x) = 4x^2 + 330x + 4356
