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Expert-verified Found in: Page 127 ### Pre-algebra

Book edition Common Core Edition
Author(s) Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
Pages 183 pages
ISBN 9780547587776 ## Step 2. To determine

We have to write the equation for the total phone bill of last month with m extra minutes.

## Step 3. Calculation

Cost of 1 extra minute = $0.25 The cost of m extra minutes is =$0.25m.

Given that the fixed fee for 200 minutes is = $19.50. So, the total bill is:$19.50+0.25\cdot m$ Given that the total bill is$29.50

So, the equation for the total phone bill of last month with m extra minutes will be:

$29.50=19.50+0.25\cdot m$

## Step 2. To determine

We have to find the number of additional minutes used last month.

## Step 3. Calculation

The number of additional minutes used last month is $m=40\text{minutes}$ ### Want to see more solutions like these? 