The angles of a triangle are 80°, 2x+ 2° and 5x degrees. what is the value of x?

Write an algebraic expression for the word expression the quotient of c and 8

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?

Evaluate cos2θ for cosθ = square root of 3/2