Evaluate ab when a=3 and b=-1.

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

What is x3+3x2−16x−48 divided by x−1?