Answer: 84
Explanation:
Total for 5 tests = 80 x 5 = 400
Total for 4 tests = 84 + 75 + 81 + 76 = 316
5th score = 400 - 316 = 84
See until and unless a value is given to x or an equation is given which satisfies it is given then only this can be solved.
Answered By GauthMath if you like pls heart it and comment thanks.
A. See the picture for steps
<span>Solution
m = {-13, -1}</span>