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harkovskaia [24]
3 years ago
10

The ratio of boys to girls in three art classes at Chester Middle School is the same.

Mathematics
1 answer:
Sedaia [141]3 years ago
5 0

Answer:6

Step-by-step explanation:

8:12 reduced is 2:3

12:18 reduced is 2:3

So sculpting is... __:9

3*3=9

Therefore, 2*3=6 because the ratio is 2:3

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A total of 150 new recruits join an army training course. After one month, 30 have dropped out. what is the percentage decrease
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So what will it be a percentage of? it will be the percentage of the original recruits, of the original 150.

for this, we need to divide the number of recruits that left over all recruits, and multiply by 100%:\frac{30}{150} *100%= \frac{1}{5} *100%=20%

so the number of trainees decreased by 20 %
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K - 4.8=0.32 - 5.4k answer?
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Answer:

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Step-by-step explanation:

k - 4.8=0.32 - 5.4k\\\mathrm{Multiply\:both\:sides\:by\:}100\\k\times\:100-4.8\times\:100=0.32\times\:100-5.4k\times\:100\\\\Refine\\100k-480=32-540k\\\\Add\: 480\mathrm{\:to\:both\:sides}\\100k-480+480=32-540k+480\\\\Simplify\\100k=-540k+512\\\\\mathrm{Add\:}540k\mathrm{\:to\:both\:sides}\\100k+540k=-540k+512+540k\\\\Simplify\\640k=512\\\\\mathrm{Divide\:both\:sides\:by\:}640\\\frac{640k}{640}=\frac{512}{640}\\\\k=\frac{4}{5}

5 0
2 years ago
How is the process of finding equivalent ratios like the process of finding equivalent fractions
MaRussiya [10]
Ratios are fractions. Equivalent means equal, if you change one set of numbers, you have to change the second set of numbers so then that Ratio or Equivalent fraction stays equal on both sides.  
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What 3 prime numbers times together to make 231
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231 | \div 3 \\
77 | \div 7 \\
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