Solve for v: v-6+=-9+3v-6-4

How do you determine if an ordered pair is a solution to a given equation?

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?