Answer:
option E is your correct answer
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If Keith pays $70, we know that $14 would have been paid, regardless of how long he rented a bike for. 70 - 14 = 56, so $56 would have been paid depending on the time he rented the bike for. If the cost per hour is $7, then the number of hours Keith rented the bike for is just $56 ÷ $7 per hour, which equals 8 hours.
Keith rented the bike for 8 hours.
Hope this helps!
Answer:
16.5
Step-by-step explanation:
So we have the function:

To find f(2.5), substitute 2.5 for x. Thus:

Multiply:

Add:

And we're done!
Convert all numbers into fractions:
-29/6
-31/9
Find a common denominator
-87/18
-62/18
Perform the operation
-149/18