Xavier has 20 dollars more than sara. their combined money totals $90. write a system of equations to represent this situation.

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?

Find the root(s) of f (x) = (x- 6)2(x + 2)2.