Problema Solution
Solve. Please show the algebraic inequality you used and show all of your work.
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 provided by our tutors
let x score must she earn on her fourth test in order to have an average of 80 or above
(85 +92 +71 +x)/4=80
248 +x= 320
x=72