7 is divided by the sum of a number and 8.

Step-by-step explanation:

Let the number be 'x'

Sum of a number and 8 : n +8

7 divide by (n+8) is

pls ask

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.