Find the polynomial for the area.
A
x+8y
The area is

1/2(x² + 7xy - 8y²) or 1/2x² + 7/2xy - 4y²

Step-by-step explanation:

1/2(x+8y)(x-y)

1/2(x² - xy + 8xy - 8y²)

1/2(x² + 7xy - 8y²)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.