Lemma
MediumQuadratics
OpenStax, Elementary Algebra 2e §10.3 Solve Quadratic Equations Using the Quadratic Formula · Exercise 42 · Algebra · Quadratics

Solve Quadratic Equations Using the Quadratic Formula · Exercise 42

An architect is designing a hotel lobby. She wants to have a triangular window looking out to an atrium, with the width of the window 6 feet more than the height. Due to energy restrictions, the area of the window must be 140 square feet. Solve the equation for , the height of the window.

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

~8 minWritten answer · check your work with Lemma

OpenStax, Elementary Algebra 2e · §10.3 Solve Quadratic Equations Using the Quadratic Formula · Exercise 42

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.