Chapter 3: Problem 23
Solve the equation if possible. $$ -30 d+12=18 d $$
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
Evaluate the expression. $$10-[4.3+2(6.4 \div 8)]$$
In any triangle, the sum of the measures of the angles is \(180^{\circ}\). In triangle \(A B C, \angle A\) is four times as large as \(\angle B\). Angle \(C\) measures \(20^{\circ}\) less than \(\angle B\). Find the measure of each angle.
There are 4 times as many nickels as dimes in a coin bank. The coins have a total value of 600 cents (6.00 dollar) Find the number of nickels.
In Citizen of the Galaxy by Robert Heinlein, Thorby learns that he owns “an interest in a company . . . through a chain of six companies—18% of 31% of 43% of 19% of 44% of 27%, a share so microscopic that he lost track.” Let x represent the total worth of the company in which Thorby owns a share. Suppose Thorby's share of the company is worth 1000 credits. Write and solve an equation to find the total worth of the company.
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.
