Which expression is equivalent to 3x−1/2y+2 2/3y−5/6x

What is the inverse of the function f(x)=2x+1

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )