Gary cashed a check from Joan for $30.25. Then he bought two magazines for $2.35 each, a book for $6.05, and a CD for $6.37. He had $24.85 left. How much money did he have before cashing the check?

  $11.72

Step-by-step explanation:

The equation for his transactions could be ...

  (initial amount) + $30.25 - 2(2.35) -6.05 -6.37 = $24.85

  initial amout +$13.13 = $24.85

  initial amount = $11.72 . . . . . . . . subtract 13.13

Gary had $11.72 before cashing the check.

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,

$6.42

step-by-step explanation: