Question

Hey need this ASAP I’ve work through almost just need this one

Answer 1

Answer:

He must score an 86 or more on his third test.

Step-by-step explanation:

An average is calculated by the sum of the numbers divided by the total number (#) of numbers (if that makes sense). Knowing this, we can write an algebraic equation in order to find the answer. Let x equal the unknown number.

John's previous test scores and this test score now must be at least an average of 90 or more. Therefore, the equation would be $\frac{86+98+x}{3} \geq 90$. Isolate x to find the answer:

$\frac{86+98+x}{3}\geq 90\\ \frac{184+x}{3} \geq 90\\184 + x \geq 270\\x \geq 86$

Therefore, he needs to get at least a 86 or higher.