All categories

3 years ago

In the school choir, there are 30 children. The ratio of girls to boys is 4:1. How many boys are in the choir?

Mathematics

1 answer:

Katarina [22]3 years ago

8 0

Answer:

6 boys

Step-by-step explanation:

For every four girls, there is one boy.

4 + 1 = 5

30 / 5 = 6

hope this helps + have a good day :)

You might be interested in

Two trains start from Fort Worth traveling at the same speed. The trip for Train W takes 20 hours, while the trip for Train Z ta

MrMuchimi

Answer:

The equation that best models this situation is :

b. $\frac{x}{20}=\frac{x+400}{25}$

Distance traveled by Train W = 1600 miles

Distance traveled by Train Z = 2,000 miles

Step-by-step explanation:

Given:

Time taken for Train W to complete a trip = 20 hours

Time taken for Train Z to complete a trip = 25 hours

The city Train Z is traveling to is 400 miles farther away than the city Train W is traveling to.

both trains have same speeds and start from same location.

To find the distance in total each train travels.

Solution:

Let length of the trip of Train W be = $x$ miles

Speed of Train W can be given as :

⇒ $\frac{Distance}{Time}$

⇒ $\frac{x}{20}\ miles/h$

So, the length of the trip of Train Z will be = $(x+400)$ miles

Speed of Train Z can be given as :

⇒ $\frac{Distance}{Time}$

⇒ $\frac{x+400}{25}\ miles/h$

Since the speeds are same, so the equation to find $x$ can be given as:

⇒ $\frac{x}{20}=\frac{x+400}{25}$

Solving for $x$

Multiplying both sides by 100 to remove fractions.

⇒ $100\times \frac{x}{20}=100\times \frac{x+400}{25}$

⇒ $5x=4(x+400)$

Using distribution.

⇒ $5x=4x+1600$

Subtracting both sides by $4x$

⇒ $5x-4x=4x-4x+1600$

⇒ $x=1600$

Thus, Distance traveled by Train W = 1600 miles

Distance traveled by Train Z = $1600+400$ = 2,000 miles

3 0

3 years ago

Please help me . Find x.

Paladinen [302]

Answer:

12) 5.96 ; 13)

Step-by-step explanation:

12). x and 5 are legs, so

opposite leg/adjacent leg = tangent 40°

5/x= tan40°, 5= x*tan40°, x= 5/tan40° ≈ 5.96

13). 15 is opposite leg

24 is hypotenuse

opposite leg/hypotenuse = sin(x)

sin(x) = 15/24

x = arcsin(15/24) ≈ 38.68°

6 0

3 years ago

Select the postulate of equality or inequality that is illustrated.

Mademuasel [1]

Answer: Comparison Postulate

This is the idea that exactly one statement shown below is true

a > b

a = b

a < b

So if you compare two numbers, then either the left value is larger, the left is smaller, or the the left is the same as the value on the right.

4 0

3 years ago

A. [1 3

Trava [24]

D. [ 6 10

-8 0]

would be the correct answer.

7 0

3 years ago

Read 2 more answers

What is the value of x in number 23??

Sveta_85 [38]

Answer:

We can just work backwards to find the value of x.

If 3 * x = 23,

then x = 23 / 3

and 23 / 3 = 7.6 reoccurring.

Step-by-step explanation:

Hope this helps:)

5 0

2 years ago

Read 2 more answers

In the school choir, there are 30 children. The ratio of girls to boys is 4:1. How many boys are in the choir?​

In the school choir, there are 30 children. The ratio of girls to boys is 4:1. How many boys are in the choir?