A fruit company delivers its fruit in Two types of boxes large and small a delivery of 7 large boxes and 9 small boxes has a total weight of 274 kilograms a delivery of 5 large boxes and 3 small boxes has a total weight of 141 kilograms how much does each type of box weight

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

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?