Evaluate:
(i) (3/5)^-2
(ii) (-3)^-3
(iii) (2/7)^-4

Need help please.

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.