Which statement shows the associative property of addition? (u + 7) + 13 = u + (7 + 13) if m + 3 = 18, then 18 = m + 3. 3⋅(5⋅x)=(3⋅5)⋅x 21 + 2y = 2y + 21

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,