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3 years ago

There were 390 people in a cinema. There were 175 women and 215 men. Work out the percentage of men in a cinema.

Mathematics

2 answers:

konstantin123 [22]3 years ago

8 0

Your answer should be 55.13%

Keith_Richards [23]3 years ago

5 0

Answer:

55.13%

Step-by-step explanation:

Your comparison is 215 men out of 390 people.

Divide 215 by 390 and then multiply by 100 to get your percentage

215 ÷ 390 = 0.5513

0.5513 × 100 = 55.13%

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4x + y = 7 3x + 2y = 9

Diano4ka-milaya [45]

Answer:

x = 1

y = 3

Step-by-step explanation:

<h2>Substitution Method:</h2>

Step 1:

Name The Equation

4x + y = 7 ...(1)

3x + 2y = 9 ...(2)

Step 2:

From Equation (1) we get,

4x = 7 - y

i.e.,

x = 7 - y/4

Step 3:

Substitute the value of x = 7 - y/4 in equation (2)

i.e.,

3(7 - y/4) + 2y = 9

21 - 3y/4 + 2y = 9

21 - 3y + 8y/4 = 9

21 - 3y + 8y = 9 * 4

21 + 5y = 36

5y = 36 - 21

5y = 15

y = 15/5

y = 3

Step 4:

Substitute the value of y = 3 in equation (1)

4x + y = 7

i.e.,

4x + (3) = 7

4x + 3 = 7

4x = 7 - 4

4x = 4

x = 4/4

x = 1

<h2>Verification: </h2>

4x + y = 7 i.e., 4(1) + (3) = 7

3x + 2y = 9 i.e., 3(1) + 2(3) = 9

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2 years ago