<PRE><B>Question 1183520</B>
the cost to rent a car is 30 dollars a day plus 30 cents a mile.
his bill was 105 for 2 day rental.
take away 60 dollars for the 2 day to get 45 dollars at 30 cents a mile.
divide 45 by .30 to get 150 miles.


that should be your answer.


the formula is c = 30 * x + .30 * y
x is the number of days.
y is the  number of miles.


when x = 2, the formula becomes:
c = 30 * 2 + .30 * y
simplify to get:
c = 60 + .30 * y
subtract 60 from both sides of the equation to get:
c - 60 = .30 * y
when c = 105, the formula becomes:
105 - 60 = .30 * y
simplify to get:
45 = .30 * y
divide both sides of the equation by .30 to get:
45/.30 = y
solve for y to get:
y = 150</PRE>