In the diagram below, ab is parallel to cd. what is the value of x?

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.