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sammy [17]
3 years ago
9

In a class the ratio of number of boys to the number of girls is 4:5. If the number of girls is 20, find the number of boy ??

Mathematics
2 answers:
Charra [1.4K]3 years ago
6 0

Answer:

25

Step-by-step explanation:

The answer is 25 because if the ratio is 4:5 and there are 20 girls that means they multiplied 4 times 5 to get 20 and that means you have to do the same to the ratio of boy and when you multiply 5 times 5 you get 25

yarga [219]3 years ago
3 0

Answer:

Let x and y be the no. of boys and girls in the class.

Then,

x/y = 4/5

=> 20/y = 4/5 [Given that x = no. of boys = 20]

=> 4y = 20×5

=> 4y = 100

=> y = 100/4

=> y = 25

Therefore the no. of girls in the class is 25

Step-by-step explanation:

Also can u pls mark me brainliest im new

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Will give brainliest to anyone who answers correctly btw the lines on top stand for the dots .
nevsk [136]

I believe it's -8 and 6

5 0
3 years ago
Find the equation line<br> (5,6), (4,7)
34kurt

Answer:

x+y=11

Step-by-step explanation:

Here we are given two coordinates through which our lines passes through. Now we are going to use the two point form to find the equation of the line.

The two point form is given as

\frac{y-y_1}{x-x_1}=\frac{y_2-y_1}{x_2-x_1}

Here we are given two coordinates . Thus replacing them in the formula and simplifying it will give us the equation of the line.

\frac{y-6}{x-5}=\frac{7-6}{4-5}

\frac{y-6}{x-5}=\frac{1}{-1}

(y-6)=-(x-5)

y-6=-x+5

adding x and 6 on both sides we get

x+y=11

Hence this is our equation of the line passing through (5,6) & (4,7)

8 0
3 years ago
How do you rearrange fractions
almond37 [142]
For ex:

U have 4/8 - 6/2 u would probably have to use KCF- Keep Change Flip
So then it’ll be 4/8 + 2/6
U kept the 4/8 then u changed the subtraction to addition and u flipped the 2 to the numerator and the 6 denominator.
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4 0
3 years ago
Does anyone know this ?
MariettaO [177]
180 - 64 = 116
116 / 2 = 58 :)

Check: 58 + 58 + 64 = 180
4 0
3 years ago
Only need help with the second question. Hope someone can help
DIA [1.3K]

1.11111111111%

did the math hope it helps you out

3 0
3 years ago
Read 2 more answers
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