Find (x - y) and (x + 3y) product

x2+2xy-3y2

Step-by-step explanation:

(X-y)(x+3y)

X(x+3y)-y(x+3y)

X2+3xy-xy-3y2

x2+2xy-3y2

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.