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3 years ago

what's the ratio of boys to girls in a class is 3:4 and if there are 12 boys in the class how many girls are ther

Mathematics

2 answers:

KiRa [710]3 years ago

7 0

Answer:

Step-by-step explanation:

b/g=3/4 so if there are 12 boys this becomes

12/g=3/4 multiply both sides by g

12=3g/4 multiply both sides by 4

48=3g divide each side by 3

16=g

So there are 16 girls in the class.

snow_lady [41]3 years ago

3 0

Answer:

Step-by-step explanation:

Boys is written first so 3:4 the 3 stands for boy.

12 boys in class means that the 3 from 3:4 was multiplied 4 times so you do the same to other side. 4 times 4 is 16, therefore the answer is 16.

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Marina86 [1]

A=1 b=8 c=8
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3 years ago

To construct a regular octagon, what measure would be necessary for each interior angle? Construct an angle of that measure.

svp [43]

Answer:

$135^\circ$

Step-by-step explanation:

Given that, a regular octagon is to be constructed.

To find:

Each angle in the octagon = ?

Solution:

We know that a regular triangle (polygon with 3 sides) has an interior angle of $60^\circ$ .

And a regular quadrilateral (square) has an interior angle of $90^\circ$ .

Therefore, formula for interior angle of a regular polygon with $n$ number of sides can be given as:

$\dfrac{n-2}{n}\times 180^\circ$

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Kindly refer to the attached image for the angle of $135^\circ$

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4 years ago

Selma went shopping and bought identical sweaters for each of 3 friends. If she spent $42, what was the cost of each sweater? In

faust18 [17]

Answer:

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3 years ago

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3 years ago

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4 years ago

what's the ratio of boys to girls in a class is 3:4 and if there are 12 boys in the class how many girls are ther​

what's the ratio of boys to girls in a class is 3:4 and if there are 12 boys in the class how many girls are ther