Which equation shows an example of the associative property of addition?
A.(4 + 1) + 41 = 4 + (i + 41)
B.(4 + 1) + 41 = 4i + (41+1)
C.41x ( 41 + 1) = (41 - 41) + (41x1)
D.(+41 + 1) + 0 = (-41 +1)

Standard deviation of 19,29,21,22,23

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?