Answer:
21 girls
Step-by-step explanation:
Boys: girls
5:7
Multiply each number by 3
15: 21
There will be 15 boys and 21 girls
Using scale concepts, it is found that the length of her office is of 10 ft, while the width is of 5 ft.
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- The scale of 6 cm to 15 ft means that each <u>6 cm in the drawing represent 15 ft in actual dimensions</u>.
- From this, a rule of three is applied to find the dimensions.
First, we find the actual length:
6 cm - 15 ft
4 cm - x ft



The actual length is of 10 ft.
Then, we find the actual width:
6 cm - 15 ft
2 cm - x ft



The actual width is of 5 ft.
A similar problem is given at brainly.com/question/24743277
The answer to your problem A=60
Sometimes it helps to draw it..
L-----------M-----------N
(x + 10) 3x
Since M is the midpoint, it splits LN into 2 equal sections....so LM = MN
x + 10 = 3x
10 = 3x - x
10 = 2x
10/2 = x
5 = x
MN = 3x......3(5) = 15 <===
LM = x + 10.....5 + 10 = 15
as u can see, they are both equal