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blondinia [14]
3 years ago
14

the ratio of boys to girls in the grade 3 classes at domino primary school is 3:5 . if there are 280 grade 3 learners, how many

are girls?​
Mathematics
1 answer:
melamori03 [73]3 years ago
7 0

9514 1404 393

Answer:

  175

Step-by-step explanation:

Let g represent the number of girls. Then 280-g is the number of boys. Their ratio is ...

  boys/girls = 3/5 = (280-g)/g

Clearing fractions gives ...

  3g = 5(280 -g)

  8g = 1400 . . . . eliminate parentheses, add 5g

  g = 175 . . . . . . . divide by 8

There are 175 girls in the grade 3 classes at Domino Primary School.

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X+5 = x^2 - x + 2
0 = x^2 -2x - 3
0 = (x-3)(x+1)

x = -1,3

y = -1 + 5 OR y = 3+5
y = 4 OR y = 8

y = 4,8

So we have two ordered pairs, (-1,4) and (3,8).

Hope that helped!

can you mark my answer as brainliest btw?

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3 years ago
What is the slope called if zero is on the numerator or top of the fraction?
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C, D

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3 years ago
If Mrs. Ramsey divides 5 pounds of flour equally into three bowls, what is the weight of flour in one bowl? A) 3 5 pound Elimina
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Hi there!

The key in the question is "divide". Therefore, we divide 5 by 3

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3 years ago
Read 2 more answers
When six times a number is decreased by 9, the result is 3. What is the number?
xxTIMURxx [149]
Lets say the number = x

Six times a number is decreased by 9, the result is 3
6 times x is decreased by 9, the result is 3  
(decreased means to subtract and results means equals)

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    <u> +9    +9</u>
6x = 3 + 9
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