To which subsets of the real numbers does the number 22 belong?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).