1) which of the following graphs is the narrowest? a) y=2x^2 b) y=-x^2 c) y=1.5x^2

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?