Find the sum: (x3 + 3x2 + x + 1) + (2x3 - 2x2 - 2x + 2).

Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?

Sum is 17 and their difference is 3

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.