Basically here all you want to do it substitute the values x=1 and x=2 for the given function. Use your slope formula 
.
Do same for x=3 and x=4
You next divide plug in values in to this expression:
Step-by-step explanation:
1/5x+60=2/3x-2
subtract 1/5x from 2/3x
when you do that you should get 0.46x repeating
then you add two to 60
you should get 62
62=0.46x
divide x
you get 134.7
Step-by-step explanation:
At d, f'(x) is increasing (concave up), but it is not positive. The tangent line at that point has a negative slope.
Answer:
7 miles
Step-by-step explanation:
You have total of $20
We subtract $2.50 from it since it is the base charge, so now we have:
20 - 2.5 = $17.50
This is for the number of miles at $2.50 PER MILE. To find the number of miles we can travel for this, we have to divide the amount we have (17.5) by the rate per mile (2.5), so we have:
17.5/2.7 = 7
So for a total of $20, we can travel 7 miles (without tip)
