Jenny has finished 15 of the 20 lessons in her piano book liam has finished the same percent of lessons from his piano book hi book contains 40 lessons how many lessons has liam fineshed

Which graph represents the equation y =4x

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota