Fifteen sprinters ran the 50-yard dash in an average of 9.5 seconds. of those runners,3 ran the dash in 11.5 seconds. find the average time of the other 12 boys

What is the solution of sqrt x+2-15=-3

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

What is not true about kl and mn? what is mn? (show your work)