Volunteers at sam's school use some of the student council's savings for a special project. they buy 8 backpacks for $9 each and fill each backpack with paper and pens that cost $3. by how much did the school council's savings change because of this project?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.

How do newtons third law of motion demonstrates on a rollar coster