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SpyIntel [72]
2 years ago
11

Last year there were 45 memebers of the tennis club at Marks Middle school. This year although the number of boys increeased by

20%, the number of girls decresed by 20%, the total numbers decresed by 1. Find how many boys anf girls are in the tennis club this year.
Mathematics
1 answer:
Bas_tet [7]2 years ago
3 0

Answer:

24 boys & 20 girls

Step-by-step explanation:

Last year:

Number of boys = x

Total number = 45

Number of girls = 45 - x

An increase of 20% is the same as multiplying by 1.2

A decrease of 10% is the same as multiplying by 0.8

This year:

New number of boys: 1.2x

New number of girls: 0.8(45 - x)

New total number = 45 - 1 = 44

1.2x + 0.8(45 - x) = 44

1.2x + 36 - 0.8x = 44

0.4x + 36 = 44

0.4x = 8

x = 20

Last year there were 20 boys and 25 girls.

This year there are 20 * 1.2 = 24 boys

and 44 - 24 = 20 girls

Answer: 24 boys & 20 girls

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<em> The distance from your eyes to the stage is 8.85 ft</em>

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4 0
2 years ago
Find the scale factor<br> A. 3.5<br> B. 3/5<br> C. 35
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3.5

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35/10 = 3.5

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3 years ago
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S_A_V [24]
No, 10^2 + 14^2 ≠ 18^2
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3 years ago
Which table shows a proportional relationship between x and y?
swat32

Answer: C

Step-by-step explanation:A proportional relationship is a relationship which crosses through the origin (0,0) and which has a proportional constant. We can determine this either by finding (0,0) where x=0 and y=0 in the table or by dividing y/x. None of the tables contain (0,0) so we will divide y by x. We are looking for a table which when each y is divided by its x we have the same constant appearing.

These fractions are not equal. This is not proportional.

x 2 3 4 5

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8 0
3 years ago
At Stephanie's new job, she spent $6.50, $8, $7.25, $13.50, and $9.75 on lunch the first week. In the second week, Stephanie spe
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Answer:

The mean for the second week is $2 less than the first and in percentage it is 22% less.

Step-by-step explanation:

The mean is given by the sum of all individual values divided by the number of values. For the first week the sum is:

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The mean for the second week is $2 less than the first and in percentage it is 22% less.

6 0
3 years ago
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