Question

Mary uses the number line below to represent the solution set of the inequality 50 - 8t < 90

What mistake did Mary make? Please give and detailed explanation. Thank you!

Answer 1

The line is on the wrong side.

Explanation:

Sorry, short on time. I meant to write the process, but I can't.

Answer 2

`\text{Solve the inequality:}\\\\50-8t<90\\\\\text{Subtract 50 from both sides}\\\\-8t<40\\\\\text{Divide both sides by -8, while also flipping the inequality}\\\\t>-5\\\\\text{The thing that Mary did wrong was that she drew the direction of the arrow}\\\text{to the wrong side. She was supposed to draw the line going to the right.}`