What is the cost, in dollars, to ride x+y miles?

Question

If a taxi ride costs d dollars a mile for the first x miles, and d+n dollars for each additional mile.

 

A. xd+(x+y)(d+n)
B. (2x+y)(2d+n)
C. (x+y)(d+n)
D. xd+y(d+n)
E. xd+yn

Answer 1

keep in mind cost equals miles times rate.

 

In this problem we have two rates and two miles to be used.

 

the first part of the equation should be written as

 

cost=x(miles)d(dollars)

 

the second half would then be

 

cost = y(miles)(d(dollars)+n(new rate))

 

so we would add the new rate to the original rate and the equation should be

 

D. xd+y(d+n)

 

 

Answer 2

To find the total cost, multiply the cost per miles times the number of miles. The first x miles cost d dollars/mile: x*d The next y miles cost (d+n) dollars/mile: y*(d+n) Add them up to find your total!