maria rented the same car twice in one month. She paid $180 the first rime for 3 days and she drove a total of 150 km. The next time, she also paid $180 and had the vehicle for only 2 day, but traveled 400 km. A. What was the cost per day. B. What was the cost per kilometer

Answer 1

Say, cost per day = D

Say, cost per km = k

3D + 150k = 180
2D + 400k = 180

Multiply the first equation by 2 and the second by 3:

6D + 300k = 360
6D + 1200k = 540

Subtract the first equation from the second:

900k = 180

Divide both sides by 900:

k = 0.2

2D + 400k = 180

2D + 400(0.2) = 180

2D + 80 = 180

Subtract 80 from both sides:

2D = 100

D = 50

The cost per day is $50 and the cost per km is $0.20

Answer 2

part 1
Describe the graphs of the functions f(x) = 2^x – 1 and g(x) = –2^x – 1.
Part 2
Compare and contrast the domain and range of f(x) and g(x).

Answer 3

thank you