Answer:
16 boys
Step-by-step explanation:
Lets go with easy example:
20% of 100 students means 20 students: what is done there
- We converted 20% to 20/100 so
![\frac{20}{100}*100=20](https://tex.z-dn.net/?f=%5Cfrac%7B20%7D%7B100%7D%2A100%3D20)
Lets do the same with 80 students as well
Answer:
B i believe
Step-by-step explanation:
Answer:
![2\sqrt{5}](https://tex.z-dn.net/?f=%202%5Csqrt%7B5%7D%20)
Step-by-step explanation:
Use the distance formula.
Subtract the x-coordinates and square the difference.
3 - 7 = -4; (-4)^2 = 16
Subtract the y-coordinates and square the difference.
4 - 2 = 2; 2^2 = 4
Add the differences and take the square root of the sum.
16 + 4 = 20; sqrt(20) = sqrt(4 * 5) = 2sqrt(5)
distance = 2sqrt(5)
You can use the distance formula which does the same thing.
![d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B%28x_2%20-%20x_1%29%5E2%20%2B%20%28y_2%20-%20y_1%29%5E2%7D%20)
![d = \sqrt{(7 - 3)^2 + (2 - 4)^2}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B%287%20-%203%29%5E2%20%2B%20%282%20-%204%29%5E2%7D%20)
![d = \sqrt{(4)^2 + (-2)^2}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B%284%29%5E2%20%2B%20%28-2%29%5E2%7D%20)
![d = \sqrt{16 + 4}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B16%20%2B%204%7D%20)
![d = \sqrt{20}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B20%7D%20)
![d = \sqrt{4 \times 5}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B4%20%5Ctimes%205%7D%20)
![d = \sqrt{4} \times \sqrt{5}](https://tex.z-dn.net/?f=%20d%20%3D%20%5Csqrt%7B4%7D%20%5Ctimes%20%5Csqrt%7B5%7D%20)
![d = 2\sqrt{5}](https://tex.z-dn.net/?f=%20d%20%3D%202%5Csqrt%7B5%7D%20)
0.03
Step-by-step explanation:
S ∝ t, introduce constant, if value of S depends on t only. Let that constant be 'k'.
=> S = kt
When, S = 0.6 & t = 4:
Answer
=> 0.6 = k(4)
=> 0.6/4 = k
=> 0.15 = k
Therefore, when t = 0.2
=> S = kt
= (0.15)(0.2)
= 0.03
So if the main question is 9q x 3 it would equal 27q