Yis between x and z, xy=13.8, and xz=21.4 find yz

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.