OpenStax, Elementary Algebra 2e §8.1 Simplify Rational Expressions · Exercise 70 · Algebra · Rational expressions

Simplify Rational Expressions · Exercise 70

Work The length of time it takes for two people for perform the same task if they work together can be found by evaluating the formula $\frac{x y}{x + y} .$ If Tom can paint the den in $x =$ 45 minutes and his brother Bobby can paint it in $y =$ 60 minutes, how many minutes will it take them if they work together?

Its source prints no answer for this problem, so there's nothing to check against.

~8 minWritten answer · compare with the solution

OpenStax, Elementary Algebra 2e · §8.1 Simplify Rational Expressions · Exercise 70

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.