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Aleksandr [31]
3 years ago
13

Ratio of boys to girls in a class of 27 is 1:2 how many boys will there be?

Mathematics
2 answers:
Sedaia [141]3 years ago
7 0

Answer:

Number of boys is 9

Step-by-step explanation:

Hint: number of girls added to number of boys must equal 27

27/3 = 9

boys: girls ratio is 1:2, so boys constitute 1/3 of the class

boys -> 1 x 9 = 9

girls -> 2 x 9 = 18

(to check, 9 + 18 = 27. If solution is still unclear, try drawing a pie of 3 equal components to represent a 1:2 ratio of slices)

labwork [276]3 years ago
6 0

Answer:

Ratio of boys is 13.5 i think

Step-by-step explanation:

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Hi can you please help me​
astra-53 [7]

Answer:

<h2>Area = 90 cm²</h2><h2>Perimeter = 53 cm</h2>

Step-by-step explanation:

area and perimeter of the given diagram

<u>area = 1/2 * base * height</u>

where base = 15 cm

        height = 12 cm

plugin values into the formula

area = 1/2 * 15 * 12

area = 90 cm²

<u>Perimeter = add up all sides (AB + AC + BC)</u>

where side BC = √(5² + 12²)

                   BC = 13 cm

Perimeter = 25cm + 15 cm + 13 cm

Perimeter = 53 cm

6 0
3 years ago
A rectangular prism has a volume of 711.68 cubic inches. Long and 12.8 inches wide. What is the height of the prism?
oksian1 [2.3K]
Are the length and the width the same?
7 0
3 years ago
calculate the rate of change <br> -24 ,60) ,( -34, 50<br> please help
VLD [36.1K]

Step-by-step explanation:

the rate of change is the slope of the line connecting both points.

the slope is the ratio y/x indicating how many units y changes, when x changes a certain amount of units when going from one point to another.

so, here

x changes by -10 units (from -24 to -34)

y changes by -10 units (from 60 to 50).

the slope or rate of change is -10/-10 = 1/1 = 1

4 0
2 years ago
What is the difference in place value between 2 in 324 and the 2 in 0.324
icang [17]

Answer: the decimal should still be there but you don’t want to have a zero so 3.42 would be correcr

Step-by-step explanation:

4 0
3 years ago
Find the length of MN.<br> A) 7 <br> B) 25 <br> C) 32 <br> D) 39
MrRissso [65]

Step-by-step explanation:

Answer C)

Explanation:

MN + NP = MP

MP = 39

Therefore, 4(x + 5) + 2x + 1= MP

So, 4(x + 5) + 2x + 1= 39

(4x + 20) + 2x +1 = 39

So, (4x + 2x) + (20 + 1) = 39

6x + 21 = 39

Addition changes to Subtraction

So, 6x = 39 - 21

6x = 18

Multiplication changes to Division

x= 18/6

x=3

Therefore MN = 4(x + 5)

So, 4(3 + 5) = 4(8)

4(8) = 32

Therefore, MN = 32

Hope this helps!

3 0
3 years ago
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