Amber and austin were driving the same route from college to their home town. amber left 2 hrs before austin. amber drove at an average speed of 55 mph, and austin averaged 75 mph per hour. after how many hours did austin catch up with amber?
a. 10 h
b. 7.5 h
c. 5.5 h
d. 2 h
ps. answer b. 7.5 h is wrong. i just took the test and doing a redo.

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

its 4 because 2 times 2 is 4, if you double the number two you get four

n

step-by-step explanation:

they would have to work 32 hours.