Which of the expressions below are equivalent?

8x - 4 4x 4(2x - 1)

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Which expression is equivalent to sq-80

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg