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miss Akunina [59]
3 years ago
14

Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points

does she need on her last test to earn an 82 for the quarter
Mathematics
2 answers:
ki77a [65]3 years ago
6 0
77 points. 82*4=328 328-72-97-82=77 You can check this by adding 77,72,97, and 82, and divide it by 4
Rom4ik [11]3 years ago
3 0

Answer:

<em>She needs </em><em>77 </em><em>on her last test to earn an 82 for the quarter.</em>

Step-by-step explanation:

Maria scored 72, 97, and 82 on her first three math tests.

She wants to have a mean score of 82 for the quarter.

Let us assume that she must score x on her last test to earn an 82 for the quarter.

So the average score will be,

=\dfrac{72+97+82+x}{4}

But the average score is given as 82, so

\Rightarrow \dfrac{72+97+82+x}{4}=82

\Rightarrow 72+97+82+x=82\times 4

\Rightarrow 72+97+82+x=328

\Rightarrow x=328-72-97-82

\Rightarrow x=77

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