9.) In isosceles trapezoid ABCD with AB=CD, if AB = 3x -15 and CD = 7x – 55, find AB.
B
(1) 10
(2) 25
(3) 15
(4) 30

2: 10

step-by-step explanation:

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.

b

step-by-step explanation:

this is because the profit is decreasing and turning into debt