2(4 - 16) - (-30)
2(-12) - (-30)
24 - (-30)
54

If the measure of xyz is 81 what is the measure of yz

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?