PLEASE HELP!!

Sin <k=
A. 1/2
B. (sqrt3)/3
C. 2
D. 2sqrt3

What are “like terms”? why can we only add like terms?

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

Determine which postulate or theorem can be used to prove that lmn =nmo