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ch4aika [34]
3 years ago
7

The ratio of boys to girls at the grammar school is 5:7. If there are 95 boys, how many girl are there? Show your work.

Mathematics
1 answer:
VLD [36.1K]3 years ago
3 0

Answer:

B

Let total number of students be x.

Ratio of boys to girls= 5:7

=5x:7x

According to question,

5x =95

Or x=95/5

x=19

Now,

Number of girls =7x

=7*19

=133

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alekssr [168]

Answer:

98.8 cm²

Step-by-step explanation:

Hi there!

A=\frac{1}{2} Pa where P is the perimeter of the pentagon and a is the apothem (the line going from the center of the pentagon one edge)

<u>1) Find the perimeter</u>

P=5l where l is the side length

Plug in the side length 7.6 cm

P=5(7.6)\\P=38

Therefore, the perimeter of the pentagon is 38 cm.

<u>2) Find the area</u>

A=\frac{1}{2} Pa

Plug in the perimeter (38) and the apothem (5.2)

A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (197.6)\\A=98.8

Therefore, the area of the pentagon is 98.8 cm².

I hope this helps!

5 0
3 years ago
The revenue, in dollars, of a company that makes toy cars can be modeled by the polynomial 3x2 + 4x – 60. The cost, in dollars,
Tems11 [23]

For this case we have the following quadratic functions:

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Substituting values we have:

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Answer:

An expression that represents the profit is:

Profit = 5x - 260

4 0
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