Solve this system of equations 3x + 5y = −72 and 2x + 3y = –45 using the linear combination method. HEL PLEASE

What is the length of an with endpoints a 3,2 and b 8,14

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

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