It cost 1$ for each free rental and 2$ for each box of popcorn. In all 51 members were signed up and the store cost for incentives was 78$. How many of each incentive were given away?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.