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elena-14-01-66 [18.8K]
3 years ago
7

In order to get a A in his math class, a student needs to get an average of a 95 on four tests. He scored a 94, 89, and a 98 on

his first three tests. What score does he need on his fourth test to earn the A? Define the variable, write and solve an equation, and answer the question.
Mathematics
1 answer:
liq [111]3 years ago
6 0

Answer:

99

Step-by-step explanation:

let x be the score in his fourth test.

average is calculated as

average = \frac{sum}{count} , thus

\frac{94+89+98+x}{4} = 95 ( multiply both sides by 4 )

281 + x = 380 ( subtract 281 from both sides )

x = 99

He needs a score of 99 on his fourth test.

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