The first term in the sequence 5, 7, −7, is 5. each even-numbered term is 2 more than the previous term and each odd-numbered term, after the first, is (−1) times the previous term. for example, the second term is 5+2 and the third term is (−1)×7. what is the 255th term of the sequence?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

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.