A new school is deciding whether their lessons should be 30,50 or 60 minutes long. How long is the total teaching time of each school day?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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?