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UkoKoshka [18]
3 years ago
9

How to solve problem?

Mathematics
1 answer:
nirvana33 [79]3 years ago
4 0

Answer:

5042

Step-by-step explidkanation:

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John took 3 exams so far this semester. He scored 45, 65 and 80 on those 3 exams . What score does he need on the fourth exam to
Olegator [25]

Answer:

He \: needs \: to \: score \: 90 \: or \: more

Step-by-step explanation:

\frac{x + 45 + 65 + 80}{4}  \geqslant 70\Leftrightarrow x + 190 \geqslant 280\Leftrightarrow x \geqslant 90

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To solve this, set up the equation, 90% of x being .9*x=57. Then, solve for x, x=57/.9=6 \frac{1}{3}=6.333
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Step-by-step explanation:

3 0
3 years ago
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quester [9]
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shepuryov [24]

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You always do what's in parenthesis first.

8 0
2 years ago
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