Answer:This seems easy! do u want help on how to do the answer or r u just looking for the answer????/
Step-by-step explanation:
Answer:
OR 
Step-by-step explanation:
So first you find the difference between the new cost and the old cost:
450 - 370 = 80
So the increase was 80.
When you write it as a fraction you write the increase ( 80 ) over the starting cost ( 370 ).
Thus the answer becomes 
But you can always reduce it to its lowest terms thus:

HOPE THIS HELPED
Answer:
10
Step-by-step explanation:
f(x) = 3x + 1
f(3)= 3 * 3 + 1 + 10
Answer
b
highest he should make is 3599.55 and lowest is 3332.55 so a doesnt fit and b does