Question

Myra owns a car service that charges a $5 flat rate and an additional $0.50 per mile, which is represented by the equation y = 0.5x + 5, where x is the number of miles and y is the total cost.

How much is the total cost for a car with 30 miles?

Answer 1

$20
Because it costs $0.50 per mile so 0.50 times 30 but then you have the 5$ flat rate.
0.50x30+5=20

Answer 2

just substitute
0.5(30)+5 =20