Simplify cos(2x)/
cos(x) - sin(x)?
•2 sin(x) cos(x)/
cos(x) - sin(x)
•2 sin(x) cos(x)/
sin(x) - cos(x)
•cos(x) + sin(x)
•cos(x) - sin(x)

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*