Chapter 3: Problem 15
Check whether the given number is a solution of the equation. $$\frac{x}{4}-7=13 ; 24$$
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
A publishing company needs to enter 910 pages it received from an author into its word processing system, so the writing can be edited and formatted. One person can type 15 pages per hour. Another person can type 20 pages per hour. Write and solve an equation to find how long it will take the two people working together to enter all of the pages.
Simplify the expression. $$\frac{i}{-4}(-4)$$
Simplify the expression. $$-19 a \div 19$$
You are conducting a survey on the use of air-plane phones. You survey 320 adults and find that 288 of them never made a phone call from an airplane. If you surveyed 3500 adults, how many of them would you predict have made a phone call from an airplane? Explain.
Two student volunteers are stuffing envelopes for a local food pantry. The mailing will be sent to 560 possible contributors. Luis can stuff 160 envelopes per hour and Mei can stuff 120 envelopes per hour. a. Working alone, what fraction of the job can Luis complete in one hour? in \(t\) hours? Write the fraction in lowest terms. b. Working alone, what fraction of the job can Mei complete in \(t\) hours? c. Write an expression for the fraction of the job that Luis and Mei can complete in \(t\) hours if they work together. d.To find how long it will take Luis and Mei to complete the job if they work together, you can set the expression you wrote in part (c) equal to 1 and solve for \(t\). Explain why this will work. e. How long will it take Luis and Mei to complete the job if they work together? Check your solution.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
