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3 years ago

The ratio of boys to girls in a church choir is 2:5. There are 9 more girls than boys. How many girls and boys are in the choir?

Mathematics

2 answers:

vredina [299]3 years ago

7 0

Answer:

6 boys, 15 girls

Step-by-step explanation:

I will use B for boys and G for girls

$\frac{B}{G} = \frac{2}{5} \\G = B + 9\\\frac{B}{B+9} =\frac{2}{5}\\$

Cross multiply

$5B = 2(B + 9)\\5B = 2B + 18\\3B = 18\\B = 6$

There are 6 boys, so that means that there are 15 girls

A ratio of 6:15 can be simplified by dividing by 3

6/3:15/3 = 2:5

tia_tia [17]3 years ago

7 0

Answer: 21
Here’s why using the bar modelling method

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Answer: 6x^2y

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natima [27]

The height of the ceiling is 162.31 meters

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3 years ago

What the vertex and AOS if the equation is y=(x-2)^2-2

Ugo [173]

Answer:

See below.

Step-by-step explanation:

For y = a(x - b)^2 + c , the vertex is at (b, c) and the axis of symmetry is x = b.

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the vertex is (2, -2) and the axis of symmetry is x = 2.

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4 years ago

Please Help, i will give brainiest. Please solve the problem about Sara kicking football.

sashaice [31]

Answer:

20 m

Step-by-step explanation:

The maximum height is given by the vertex form of the equation, that is

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3 years ago

lorena lifeguards at a lap pool that is 25 yards long, 10 ards wide, and 2 yards deep. There is a drain around he entire top edg

Varvara68 [4.7K]

The true statements about the pool are

The drain is best measured using perimeter
The area of the cover is 250 square yards
One edge of the pool measures 10 yd

<h3>How to determine true statements?</h3>

The given parameters are:

Length = 25 yards
Width = 10 yards
Depth = 2 yards

To measure the drain, we simply calculate the perimeter of the edge of the pool.

This means that (a) is correct

When the volume is calculated, the unit is cubic yard or yd³.

This means that (b) is wrong

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Area = Length * Width

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Area = 25 yards * 10 yards

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This means that (c) is correct

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Perimeter = 2 * (25 + 10)

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2 years ago