Use Variables in Real-World Problems Practice Test

A taxi company charges a base fee plus an additional amount per mile. The total cost for a 12-mile trip is $18, and the total cost for a 20-mile trip is $26. If $$b$$ represents the base fee and $$m$$ represents the cost per mile, which expression could represent the total cost for any trip of $$d$$ miles?

A rectangular garden has a length that is 8 feet longer than its width. The perimeter of the garden is 56 feet. If $$w$$ represents the width of the garden, which equation can be used to find the width?