6th math dont know whhhy i gotten it wrong

Question

The taxi charges an initial fee of

​$4

and then

​$3

per mile. Write an algebraic expression for the cost of a taxi ride of m miles. Then evaluate the expression to find how much

a

7​-mile

taxi ride would cost

Jennifer.

Write an algebraic expression for the cost of a taxi ride of m miles. Choose the correct answer below.

== 4+3m

A 7-mile taxi ride would cost her $17 right

Answer 1

Cost = $4 + $3*m

Use m=7

Cost = $4 + $3*7

= $4 + $21

= $25