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3 years ago

In a class of 18 there are 2 girls for every 1 boy. how many girls are there?

Mathematics

2 answers:

WARRIOR [948]3 years ago

7 0

2 girls = 1 boy
12 girls = 6 boys
12 + 6 = 18
girls = 12

dsp733 years ago

3 0

X-girls y-boys

if x+y=18 and 2x=y then

x+2x=18
3x=18
x=6

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A pair of jeans is marked up 20% on the original price. The original price was $50. What is the sale price of the pair of jeans

Anarel [89]

Answer:

20% of $50 is $10. This means that the pair of jeans now cost $60 since it got marked up.

Step-by-step explanation:

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2 years ago

What is the value of a in the equation 3+b=54 when b = 9

Fed [463]

Answer:

3a + b = 54

3a + 9 = 54

3a = 54 - 9

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a = 15

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3 years ago

A regulation basketball has a diameter of about 9 in. What is the best approximation for the volume of this ball? 3050 in³ 382 i

Mandarinka [93]

The best apporximation for the volume of this ball is 382 cubic inches.

<h3>What is the volume of the ball?</h3>

The volume of the ball is calculated by the formula V = 4 / 3πr³. This formula is the same in the whole world.

Given

A regulation basketball has a diameter of about 9 in.

The radius of the ball is;

$\rm Radius = \dfrac{Diameter}{2}\\\\Radius=\dfrac{9}{2}\\\\Radius=4.5\ inches$

The volume of the ball is;

$\rm Volume =\dfrac{4}{3}\pi r^3\\\\Volume=\dfrac{4}{3} \times 3.14 \times 4.5^3\\\\Volume =\dfrac{144.53}{3}\\\\Volume = 381.51\\\\Volume = 382 \ In^3 \ apporx$

Hence, the best apporximation for the volume of this ball is 382 cubic inches.

To know more about volume click the link given below.

brainly.com/question/10647788

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2 years ago

Help!! giving brainiest!!

Luda [366]

Answer:

The school is closest

Step-by-step explanation:

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2 years ago

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A rectangle is 4 ft long and 2 ft wide. find its area in square inches.

denis-greek [22]

$\text{Area of rectangle} = \text{length} \times \text{width}\\\\~~~~~~~~~~~~~~~~~~~~~~~=4 ~\text{ft}~\times ~2 ~\text{ft}\\\\~~~~~~~~~~~~~~~~~~~~~~~=8~ \text{ft}^2\\\\~~~~~~~~~~~~~~~~~~~~~~~=1152~\text{in}^2$

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2 years ago