Your test grades are 70. 85. 95. 93 and 94. You have one more test and want an average of an 86. What must

you earn on your next test?

79

Step-by-step explanation:

Let last test score be y

Average = sum of test scores / number of test scores.

Average was given in question = 86

86 = 70+85+95+93+94+y/6

86 = 437+y/6

Cross multiply

86*6 = 437+y

516 = 437+y

Collect like terms

516-437=y

Y=79