8.B So lets look at the possibilities we wrote and see how many have a sum of 7. (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (2,1) (2,2) (2,3) (2,4) (2,5) (2,6) (3,1) (3,2) (3,3) (3,4) (3,5) (3,6) (4,1) (4,2) (4,3) (4,4) (4,5) (4,6) (5,1) (5,2) (5,3) (5,4) (5,5) (5,6) (6,1) (6,2) (6,3) (6,4) (6,5) (6,6)
So out of 36 possibilities, 6 of them have a sum of seven P(sum of 7)=6/36 simplify to 1/6
I am not exactly sure, but you can't divide <em>x and y, </em>which would already make the question null and void. The simplest form would be the form it is in right now.
For this case, the first thing we must do is define a variable. We have then: x: amount of driveways shoveled on Sunday y: total amount We now write the equation that models the problem: She made $ 143 for the weekend: From here, we clear the value of x: Answer: She shoveled 9 driveways on Sunday