Question

M/ u^2+r =-k-y PLEASE HELP!!!!!

Answer 1

(b) as marked

Explanation:

Subtract r, multiply by u^2/(-k-y-r), and take the square root.

`(m)/(u^2)+r=-k-y\qquad\text{given}\\\\(m)/(u^2)=-k-y-r\qquad\text{subtract $r$}\\\\(m)/(-k-y-r)=u^2\qquad\text{multiply by $(u^2)/(-k-y-r)$}\\\\u=\pm\sqrt{(m)/(-k-y-r)}\qquad\text{take the square root}`