Solve. Please show the algebraic inequality you used and show all of your work.

Question

Stephanie has the following scores on her algebra tests: 85, 92, and 71. What score must she earn on her fourth test in order to have an average of 80 or above?

Answer 1

(85+92+71+x)/4 ≥ 80

Solve for x.

Answer 2

1.2

Answer 3

x>=4*80-85-92-71=320-85-92-71=320-248=72