Question

Jackson wants to earn a grade of at least a 90 in Ms. Prier's algebra class. Hisgrade will be determined by the average of his 3 tests. The first test, he scored an82. The second test he scored a 92. What is the lowest score he can receive to becertain he earns a 90 for the 9 weeks?

Answer 1

Jackson wants to earn a grade of at least a 90 in Ms. Prier's algebra class. His

grade will be determined by the average of his 3 tests. The first test, he scored an

82. The second test he scored a 92. What is the lowest score he can receive to be

certain he earns a 90 for the 9 weeks?

Let

x -----> score in the third test

average=(82+92+x)/3

the inequality that represents this situation is

`(82+92+x)/(3)\ge90`

Remember that

"at least" means -----> greater than or equal to

solve for x

`\begin{gathered} 174+x\ge270 \\ x\ge270-174 \\ x\ge96 \end{gathered}`

therefore

the lowest score he can receive is 96