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photoshop1234 [79]
3 years ago
10

The ratio of girls to boys who participated in the quiz bowl was 7:5. There were 42 girls in the competition. How many boys part

icipated? A) 28 B) 30 C) 35 D) 49
Mathematics
1 answer:
Zinaida [17]3 years ago
7 0
The way i do it, is sort of like this :

Is 7 a factor of 42? 
  Is 5 a factor of 42? 

7 is a factor of 42. 
It must be in multiples of 7!

Therefore, we have 5 on the other side, which makes it 5 x 7 = 35
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Step-by-step explanation:

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4 years ago
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ad-work [718]
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Order the steps needed to simplify this expression
mash [69]

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1. Simplify inside parentheses

2. Evaluate Exponents

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Bingel [31]
<span>D. 2(x + 4)
Now you get that answer by working the problem. For instance, Kailey plays x hours per month, so we get
K = x
Now Trent plays 4 more hours than Kailey, so we get
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Since we know that K = x, we can substitute x for K and get
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Now Megan plays two times as much as Trent. So we get
M = 2T
But since T = x + 4 we can subsitute x + 4 for T, getting
M = 2(x + 4)
We need the parenthesis because multiplication has a higher priority than addition and without the parenthesis the multiply by 2 wouldn't have affected the addition of 4.</span>
4 0
4 years ago
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