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rodikova [14]
2 years ago
15

There are 2 boys for every 3 girls. Today 5 new boys were added making the number of girls and boys the same. How many boys and

girls were there originally?
Mathematics
1 answer:
Anna11 [10]2 years ago
5 0

Answer:

10 boys, 15 girls

Step-by-step explanation:

Original ratio: 2 boys/3 girls

let x be the scale factor of the ratio

2x plus 5 boys over 3x girls = 1 (because the # of boys/girls are the same)-------> 2x+5/3x = 1

Simplify: 2x+5=3x

Simplify: 5=x

plug x back into the original ratio: 10/15

Check: 10/15 = 2/3

10 boys + 5 boys = 15, 15/15 = 1

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JulijaS [17]

Answer:

S.A = 730mm²

Step-by-step explanation:

Since the solid is made up of two rectangles. Then the surface area (S.A) would be

S.A = area of first rectangle + area of second rectangle

Since the first rectangle has it's base to be 25mm and height to be 21mm, then it's area is

25mm x 21mm = 525mm²

Since the second rectangle has it's base to be 41mm and height to be 5mm, then it's area is

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Therefore

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2 years ago
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Find all numbers whose absolute value is 6.
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Answer:

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2 years ago
Marie uses 2.3 oz of nuts for each bag of trail mix she makes. She uses 27.6 oz of nuts in all. How many bags of trail mix does
anastassius [24]
We are given that each bag of trail mix consumes 2.3 oz of nuts. To know the amount of bags of trail mixes that can be made using 27.6 oz of nuts, all we have to do is cross multiplication as follows:
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27.6 oz of nuts ...........> ?? bag of trail mix

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6 0
2 years ago
23) A backyard has a perimeter of 144m.
german
A) 144/4 = 36 metres per side
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3 0
3 years ago
What is the algebraic expression for "two times the sum of a number n and 24"?
konstantin123 [22]

Answer:

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Step-by-step explanation

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Hope this helps

3 0
3 years ago
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