Let a = -2.5, b = -4.1, c = 7.8, and d = 3.2
6. evaluate (a + b) / (c – d)
the final answer should have no decimals in the numerator, denominator, or final answer. (hint: multiply the top and bottom of your fraction answer by 10, then simplify the fraction.)
7. evaluate (b + d)2/a - c

Abilliard ball is struck by a cue. it travels 1 0 0 cm 100cm before ricocheting off a rail and traveling another 1 2 0 cm 120cm into a corner pocket. the angle between the path as the ball approaches the rail and the path after it strikes the rail is 4 5 ∘ 45 ∘ . how far is the corner pocket from where the cue initially struck the ball? do not round during your calculations. round your final answer to the nearest centimeter.