Which expression has a value of 31 when x = 6, y = 10, and z = 11? A.
3xyz

B.
2x + 3y – z

C.
4yz – 2x

D.
xy – 2z

The sum of two numbers is 12 and their difference is 18 what are the two numbers

What is the total surface area of this square pyramid?

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.