CarolNash CarolNash

15-01-2021
Mathematics

contestada

if John has test scores of 90 and 76 with one test remaining to be taken, what score must he make on the last test to end up with an 86 average?

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bluegreen24 bluegreen24

15-01-2021

Answer: The last score must be 92%

Step-by-step explanation: To find the average, you add all the terms, then divide by the number of terms.

86 = [tex]\frac{90 + 76 + x}{3}[/tex]

258 = 90 + 76 + x (multiple both sides by 3)
258 = 166 + x (combine like terms)
92 = x (subtract 166 from both sides)

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