7. The school photography club charges $10 for each photo in its
annual pet photo contest. The club wants to save $75 of its earnings
for a pizza party. The club members also want to have at least
$50 left over after the pizza party to pay for other club expenses.
Write an expression for:
b. the difference between the amount the club earns and the amount for the pizza party

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Can you decompose the numbers 20,740,6,000

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.