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erastovalidia [21]
2 years ago
9

During a film festival, the first film

Mathematics
1 answer:
Genrish500 [490]2 years ago
5 0

Answer:

3

Step-by-step explanation:

deccweljvrl;ej e

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The ratio of boys to girls in Jamal's class is 3:2. If four more girls join the class, there will be the same number of boys and
olchik [2.2K]

Answer:

12 boys

Step-by-step explanation:

From the above question:

Number of boys = 3

Number of girls = 2

Boys: Girls

3:2

Let :

a = boys

b = girls

Hence, a : b = 3 : 2

a/b = 3/2  

Cross Multiply

2a = 3b .......... Equation 1

a = 3b/2

If four more girls join the class, there will be the same number of boys and girls

Hence,

a: b + 4 = 3 : 3

a/b + 4 = 3/3

Cross Multiply

3a = 3(b + 4)

3a = 3b + 12 ........ Equation (2)

From Equation 1: a = 3b/2

Substitute 3b/2 for a in Equation 2 we have:

3a = 3b + 12 .........Equation 2

3(3b/2) = 3b + 12

9b/2 = 3b + 12

Cross Multiply

9b = 2(3b + 12)

9b= 6b + 24

9b - 6b = 24

3b = 24

b = 8

Substitute 8 for b in Equation 1

a = 3b/2

a = 3 × 8/2

a = 24/2

a = 12

Therefore, the number of boys in the class is 12

7 0
3 years ago
A van has room for 6students and 2teachers . How many vans are needed for a total of 48students and 16 teachers?
Juliette [100K]
8 vans are need for all to go
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3 years ago
Which expression is equivalent to 3√x5y<br>what is it?​
daser333 [38]

Answer: 3x^2 √xy

Step-by-step explanation:

5 0
3 years ago
Find the slope of the line that passes through<br> each pair of points.<br> (-3, -2), B (5, 4)
viva [34]

Answer:

0.8

Step-by-step explanation:

8 0
2 years ago
Evaluate the expression<br> 3 4 5 x − 2 1 2 for x = − 10 .
Rina8888 [55]

Answer:

3,662

Step-by-step explanation:

It says that x= -10 so you have to multiply 345 by -10 because x is next to the number 345. Then you get the number -3450-212 from there you can see they are both negative so you can add them together and take out the negative symbol at the end. Hope that helped!

7 0
3 years ago
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