Determine whether the ordered pair (3,-5) is a solution to the system -2x+y=-11 & -2x-2y=-4

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

The angle of elevation from point a to the top of a cliff is 38 degrees . if point a is 80 feet from the base of the cliff , how high is the cliff ?

What is the equation of the parabola with focus (-1,-1) and directrix y=1?