Sarah has 18 postcards in her postcard collection. she decides that from now on, every time she goes on vacation she will buy 5 postcards to add to her collection. write an equation to represent the number of postcards, y , she will have after a certain number of vacations, x .

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?