Answer:
(b) as marked
Step-by-step explanation:
Subtract r, multiply by u^2/(-k-y-r), and take the square root.
![\dfrac{m}{u^2}+r=-k-y\qquad\text{given}\\\\\dfrac{m}{u^2}=-k-y-r\qquad\text{subtract $r$}\\\\\dfrac{m}{-k-y-r}=u^2\qquad\text{multiply by $\dfrac{u^2}{-k-y-r}$}\\\\u=\pm\sqrt{\dfrac{m}{-k-y-r}}\qquad\text{take the square root}](https://tex.z-dn.net/?f=%5Cdfrac%7Bm%7D%7Bu%5E2%7D%2Br%3D-k-y%5Cqquad%5Ctext%7Bgiven%7D%5C%5C%5C%5C%5Cdfrac%7Bm%7D%7Bu%5E2%7D%3D-k-y-r%5Cqquad%5Ctext%7Bsubtract%20%24r%24%7D%5C%5C%5C%5C%5Cdfrac%7Bm%7D%7B-k-y-r%7D%3Du%5E2%5Cqquad%5Ctext%7Bmultiply%20by%20%24%5Cdfrac%7Bu%5E2%7D%7B-k-y-r%7D%24%7D%5C%5C%5C%5Cu%3D%5Cpm%5Csqrt%7B%5Cdfrac%7Bm%7D%7B-k-y-r%7D%7D%5Cqquad%5Ctext%7Btake%20the%20square%20root%7D)
220-35=185
185÷2=92.5
=92.50 For each friend
since d=3, you can plug it in into the equation
2f = 2(3)/6
2f = 6/6
2f=1
divide both sides by 2
f = 1/2
Answer:
5% of 50 is 2.5
Step-by-step explanation:
This is because if you divide by 100 it equals 0.5 then 0.5*5 equals 2.5. Np