Form three equivalent fractions for 3/4 by multiplying 5/5,7/7 and 3/3 (I don't understand)​

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?