Question

Brisbane and Rockville are 10 in apart on

a map that has a scale of 1 in : 17 mi.
How far apart are the real cities?


Answer 1

170 miles apart

Explanation:

1 inch is 17 miles, so 10 inches will represent 170 miles.

`1x=17y\\10x=17y*10\\10x=170y`

x stands for inches, y for miles, and * for multiplication.

First we multiply both sides by 10, then we simplify.