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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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Step-by-step explanation:

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3 years ago
A company has two manufacturing plants with daily production levels of 5x +14 items and 3x-7 ​items, respectively. The first pla
Llana [10]

Answer:

The first plant produces 2x + 21 more items daily than the second​ plant.

Step-by-step explanation:

The daily production of the two plants are:

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3 years ago
Find the values of x when y=1
kirill [66]

Answer:

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Step-by-step explanation:

  1. x^{2} -2x-4=0
  2. (x-1)^{2} -1-4=0
  3. (x-1)^{2} -5=0
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<u>FINAL ANSWER</u>

x=1+\sqrt{5} , 1-\sqrt{5}

<u><em>In Decimal Form (Rounded to 3 significant figures)</em></u>

<em>x≈-1.24, 3.24</em>

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