Sam counted his heartbeats while resting. His heart beat 220 times in 4 minutes. Sam's heart beat at the same rate for the 4 minutes.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

Fast! find the length of cu. the triangles are similar. show your work.