Question

An old dot-matrix printer took 11 minutes to print 2.5 pages. If 12 pages are going to be printed, how many minutes should this take?

Answer 1

Step-by-step explanation

We can use the following rate to solve the exercise.

`\frac{11\text{ minutes}}{2.5\text{ pages}}=\frac{x}{12\text{ pages}}`

Now, we solve for x:

`\begin{gathered} \text{ Multiply by 12 pages from both sides} \\ \frac{11\text{ minutes}}{2.5\text{ pages}}\cdot12\text{ pages}=\frac{x}{12\text{ pages}}\cdot12\text{ pages} \\ \frac{11\text{ minutes }\cdot12\text{ pages}}{2.5\text{ pages}}=x \\ (11\cdot12)/(2.5)\text{ minutes}=x \\ (132)/(2.5)\text{ minutes}=x \\ 52.8\text{ minutes }=x \end{gathered}`Answer

The old dot-matrix printer should take 52.8 minutes to print 12 pages.