All categories

2 years ago

The ratio of boys to girls in chorus is 2:5. If there are 42 students in the chorus how many are boys

Mathematics

2 answers:

ASHA 777 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

Let's create a table

$\left[\begin{array}{cc}boys&girls\\2&5\\2x&5x\end{array}\right]$

2 : 5 is the same as 2x : 5x because you multiply both sides in 2:5 by x

If the ratio is 2x : 5x, what is the total?

2x + 5x = 7x

The total is 7x

However, we are given that there are 42 students

So, 7x = 42

x = 6

As we said earlier, boys = 2x

We know that x = 6, so 2x must equal to 12

There are 12 boys.

Hope this helps :)

Have a nice day!

AVprozaik [17]2 years ago

6 0

Answer:

What is the ratio of boys to girls in simplest form?

The ratio of boys : girls →4:5 so you have 4 boys and 5 girls making the whole count 4+5=9 in its simplest form. So to change the ratio proportion into fraction proportion we have: boys →49 of the whole

Step-by-step explanation:

You might be interested in

Un automóvil corre a 120 kilómetros por hora y otro a 80 kilómUetros por hora; si deben recorrer 960 kilómetros, ¿con cuántas ho

Artist 52 [7]

Answer:

4 hours

Step-by-step explanation:

The speed of the first car is

$v_1 = 120 km/h$

While the speed of the second car is

$v_2=80 km/h$

The time it takes for each car to cover a distance d is

$t=\frac{d}{v}$

where

d = 960 km is the total distance covered

For car 1, the time taken is:

$t_1=\frac{960}{120}=8 h$

For car 2, the time taken is:

$t_2=\frac{960}{80}=12 h$

Therefore, the difference in time is:

$\Delta t =t_2-t_1 =12 -8 = 4 h$

8 0

3 years ago

Round 7.954 to the place named

Andrej [43]

What is it rounded too?

4 0

3 years ago

I need to know how do you do it in expanded form

Gennadij [26K]

If a number is 5679, expanded form is 5000+600+70+9

4 0

3 years ago

Read 2 more answers

Jessie bought 12 cases of soda for the party. If his total bill was $41.40, how much did each case cost?

jeka57 [31]

Answer:

B. $3.45

Step-by-step explanation:

Number of cases of soda bought = 12

Total bill payed = $41.40

Let x represent the cost of 1 case.

Thus:

12x = $41.40

Divide both sides by 12

12x/12 = 41.40/12

x = 3.45

Cost of each case = x = $3.45

4 0

2 years ago

My brother is 5 years older than me. My sister is 3 years younger than me.

Ad libitum [116K]

Answer:

A) You would be 5

B) She would be 21

C) (Im guessing n in 9?) She would be 6 then

D) (idk what k is)

E)7 Years apart

Hope this helps

7 0

3 years ago

Read 2 more answers