What is the average rate of change of h over the interval -3 2

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

X+y=-4 x-y=2 use elimination with adding and subtraction