Does anybody know how to do this for 15 points

v < 11 and x > 4

Step-by-step explanation:

(1)

given v - 4 < 7 ( add 4 to both sides to isolate v )

v < 11

(2)

given 3x > 12 ( divide both sides by 3 to isolate x )

x > 4

29.5977692753

step-by-step explanation:

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.