What is the greatest common factor of 36 and 63?

(a) 3

(b) 6

(c) 9

(d) 18

For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).

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?

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12