Mrs. o'neill has 2 times as many markers as colored pencils. the total number of markers and colored pencils is 18. how many mark does mrs. o'neill have?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: