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Grace [21]
3 years ago
7

Seventy percent of the 100 students in middle school cafeteria bought their lunch sone of the students that brought there own lu

nch leave the cafeteria to attend a assembly now only 60% of the remaining students bought their lunch how many students are remaining in the cafeteria
Mathematics
1 answer:
gogolik [260]3 years ago
3 0
So we solve for each
70% of 100=70
students who didn't buy lunch=100-70=30

some of the 70 left so that the students who bought lunch, are 60% of those who are left
we know that the students who didn't buy lunch didn't change number so therefor
100% of students left-60%=40%= students that didn't buy lunch=30 so
40%=30
20%=15
100%=75
there were 75 students lfet in the cafeteria
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Assignment: \bold{Simplify \ Equation: \ 7\left(3\sqrt{2}x\right)-3\left(3\sqrt{16}x\right)-3\left(3\sqrt{8}x\right)}

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Answer: \boxed{\bold{3\sqrt{2}x-36x}}

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Explanation: \downarrow\downarrow\downarrow

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[ Step One ] Remove Parenthesis (a) = a

\bold{7\cdot \:3\sqrt{2}x-3\cdot \:3\sqrt{16}x-3\cdot \:3\sqrt{8}x}

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[ Step Four ] Add Similar Elements

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[ Step Five ] Rewrite Equation

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\bold{\rightarrow Mordancy \leftarrow}

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