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ozzi
3 years ago
5

There are 28 students in class the ratio of girls to boys is 3:4. How many girls

Mathematics
2 answers:
Gwar [14]3 years ago
8 0

Step-by-step explanation:

let the num be 3x & 4x

3x+4x=28

7x=28

x=28/7

x=4

now, num of girls=3x=3×4=12

& num of boys=4x=4×4=16

Elis [28]3 years ago
4 0

Answer: 12 girls

Step-by-step explanation: You first want to make this equation become a fraction with the number of girls on top and the total on bottom. This becomes 3/7. To make this over 28, multiply by 4 on the top and the bottom. This makes 12/28, making 12 girls the answer.

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ElenaW [278]

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8 0
3 years ago
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Arte-miy333 [17]

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2 years ago
Read 2 more answers
Construct 3 linear equation starting with qiven solution z = 1/3
Andreyy89

Answer:

(a)9z+2=5

(b)21z-11=-4

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Step-by-step explanation:

We are required to construct 3 linear equations starting with the given solution z = 1/3.

<u>Equation 1</u>

<u />z=\frac{1}{3}<u />

Multiply both sides by 9

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Rewrite 3 as 5-2

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Add 2 to both sides

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<u>Equation 2</u>

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<u />z=\frac{1}{3}<u />

Multiply both sides by 6

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Rewrite 6z as 4z+2z

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Subtract 2z from both sides

Our third equation is: 4z=2-2z

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3 years ago
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