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3 years ago

The ratio of boys to girls in the 10th grade is 8 to 13. If there are 91 girls in 10th grade, then how many boys are there?

Mathematics

1 answer:

IRINA_888 [86]3 years ago

6 0

Answer: There are 56 boys in the 10th grade

Step-by-step explanation:

Step 1

ratio of boys to girls in the 10th grade is 8 :13

Number of girls= 91

To find the number of boys, we first find the total number of boys and girls in the 10th grade

Step 2

Now the total ratio= 8 +13=21

Number of girls = ratio of girls/ total ratio x Total number of students

91=13/ 21 x Total number of students

Total number of students =21 x 91 / 13 =147

Step 3

Therefore Number of boys =ratio of boys/ total ratio x Total number of student

8/21 x 147=56

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Answer:

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Step-by-step explanation:

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When a function is translated b units up, the number of units will be added to the y coordinate.

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When a function is translated across the y-axis, the x coordinate gets negated.

So, we have:

$F_{y\ axis} = (-x,y)$

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When a function is translated across the x-axis, the y coordinate gets negated.

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When a function is rotated 90 degrees counterclockwise, the y-coordinates gets negated and then swapped with the x-coordinate.

So, we have:

$R_{o,90^o} = (-y,x)$

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When a function is rotated 180 degrees counterclockwise, the coordinates are negated.

So, we have:

$R_{o,180^o} = (-x,-y)$

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So, we have:

$R_{o,270^o} = (y,-x)$

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