When three numbers are added two at a time, the sums are 29, 46, 53. What is the sum of all three numbers?

Step-by-step explanation:

Let the three numbers be a, b and c; such that:

---- (1)

--- (2)

--- (3)

Subtract equation 2 from 3

--- (4)

Add this equation to the (1)

Solve for a

Substitute 18 for a in (1)

Solve for b

Substitute 11 for b in (2)

Solve for c

step-by-step explanation:

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,