A car rental costs $30 a day plus $0.50/km . If the car is driven x km in a day, which equation describes the rental cost for that day?

A. 30x+50=y
B. 50x+30=y
C. 0.50x+y=30
D. 30+0.50x=y

Question

A car rental costs $30 a day plus $0.50/km . If the car is driven x km in a day, which equation describes the rental cost for that day?

A. 30x+50=y
B. 50x+30=y
C. 0.50x+y=30
D. 30+0.50x=y

anonymous · Answer

You already know that it will cost $30 and $0.50 for every km. So how would you find the total cost for driving x km?

sammixboo · Answer

Well you are already paying $30, so the 30 would be by itself, not paired with a variable. Let's say you have something and it cost $8 a day, and you had it for x days. You would do 8x to find how much money you spent, 8 being the cost per day, and x being the number of days you had it