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marissa [1.9K]
3 years ago
6

the ratio of boys to girls in a class is 7 to 11. if there are a total of 49 boys in the class , then how many boys and girls ar

e there altogether ?
Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0

Answer:

There are <u>77</u><u> girls</u> in the class when there are 49 boys.

Serggg [28]3 years ago
6 0

Answer:

126 students

Step-by-step explanation:

Boys : Girls

7 : 11

How do you get from 7 to 49?

49 ÷ 7 = 7

Therefore, you should multiply the number of boys by 7.

Multiply:

7 : 11

7 × 7 = 49

49 : 11

Remember that whatever we do to the left, do to the right.

Multiply:

49 : 11

11 × 7 = 77

49 : 77

Now, let's add the number of boys and girls in the class to find the total number of students.

Add:

49 + 77 = 126

Therefore, there are 126 students in all.

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answer
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8 0
3 years ago
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What is the value of r in the equation -3(4r - 8)=-36
Marianna [84]

Answer:

r=5

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :  

                    -3*(4*r-8)-(-36)=0  

Step by step solution :

Step  1  :

Step  2  :

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Equation at the end of step  2  :

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Step  3  :

Step  4  :

Pulling out like terms :

4.1     Pull out like factors :

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Equation at the end of step  4  :

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Step  5  :

Equations which are never true :

5.1      Solve :    -12   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

5.2      Solve  :    r-5 = 0  

Add  5  to both sides of the equation :  

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One solution was found :

                  r = 5


brainliest pllzz thx god bless

3 0
3 years ago
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if i am 57 years old and i have known someone for 6 and a half years what percentage of my life have i known that person​
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this is a simple ratio problem:

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6.5 ---> (6.5 x 100)/57 ≅ 11.4%

You have known the person for about 11.4% of your life.

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