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skad [1K]
3 years ago
5

Use the frequency table to determine how many students received a score of 70 or better on an English exam.

Mathematics
1 answer:
lesantik [10]3 years ago
7 0

Answer: 15 students

Step-by-step explanation:

>70= 5+6+4 students

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\bf \stackrel{\textit{3 lbs of "c"}}{3c}+\stackrel{\textit{5 lbs of "w"}}{5w}~~=~~\stackrel{\textit{costs}}{15} \\\\\\ \stackrel{\textit{12 lbs of "c"}}{12c}+\stackrel{\textit{2 lbs of "w"}}{2w}~~=~~\stackrel{\textit{costs}}{33} \end{cases}\qquad \impliedby \textit{let's use elimination} \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{llccccccl} 3c+5w=15&\times (-4)\implies &-12c&+&-20w&=&-60\\ 12c+2w=33&&12c&+&2w&=&33\\ \cline{3-7}\\ &&0&&-18w&=&-27 \end{array}

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Help<br><br><br><br><br><br> Will<br><br><br><br><br> Give<br><br><br><br><br> Brainlist
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Answer:

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To check

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