A triangle has sides of length 10, 8, and y inches. Which is an expression for the perimeter of the triangle and what is the perimeter when y=7? A) 8(10+y) The perimeter is 136 inches when y=7. B) 10(y+8) The perimeter is 150 inches when y=7. C) y(10+8) The perimeter is 126 inches when y=7. (or) D) y+10+8 The perimeter is 25 inches when y=7.