If line y bisects ac, ab=4-5x and bc= 2x+25 find ac

Which expression is equivalent to? assume x > 0 and y > 0.

Select the lengths in centimeters that would form a right triangle

A, at (-2, 4), is 6 .of a'? (-8, 4) (-8, -2) (-2, -2) (-2, 4) b, at (-4, -7), isy-.of b'? (-4, 7) (4, -7) (4, 7) (-4, -7)