The area of a triangle is 1/2(base)(height) and since this is a right triangle the two legs can be base and height. So the area is 1/2(2x-4)^2 which becomes 1/2(4x^2-16x+16) which is simplified to 2x^2-8x+8. B is the correct answer.
False because 7+8=15. The two sides need to add up to more then the hypotenuse
2x+14=60(vertical)
2x=46
x=23