Which of the following expresses 12 + 42 by using the GCF of the two numbers? 3(9 + 14)
3(4 + 38)
6(2 + 7)
6(6 + 36)

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.