Isaac is deciding between two truck rental companies. Company A charges an initial fee of $75 for the rental plus $1.50 per mile driven. Company B charges an initial fee of $45 for the rental plus $2.50 per mile driven. Let A
A represent the amount Company A would charge if Isaac drives
x
x miles, and let
B
B represent the amount Company B would charge if Isaac drives
x
x miles. Write an equation for each situation, in terms of
x
,
x, and determine the interval of miles driven,
x
,
x, for which Company A is cheaper than Company B.

A
=
A=
B
=
B=
Company A is cheaper than Company B when
x
x