In the diagram, ΔGEF and ΔHEF are congruent. What is the value of x?

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

In which form is the following function written? y = - 2(x – 3)(x + 5)

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.