The graph of which of the following equations is a straight line parallel to the graph of y = 2x ? a) 4x – y = 4 b) 2x – 2y = 2 c) 2x – y = 4 d) 2x + y = 2 e) x – 2y = 4

Suppose a pendulum is l meters long. the time, t,in seconds that it tales to swing back and forth once is given by t=2.01

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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.