Answer:
4 days
Step-by-step explanation:
Let the number of days = x
The number of miles is a fixed 300 at $0.11/mile which cost $33.
The cost, y is:
y = 70.23x + 33
The most money he has to spend is $380.
70.23x + 33 = 380
70.23x = 347
x = 4.94
4.94 is just under 5 days, but we must round down to 4.
Check:
A 4-day rental with 300 miles costs:
y = 70.23 × 4 + 33
y = 313.92 which is under the $380 budget
A 5-day rental with 300 miles costs:
y = 70.23 × 5 + 33
y = 384.15 which over the $380 budget
Answer: 4 days
