1st? - cynthia paid $0.20 per hobby magazine at a tag sale. she bought half of all the magazines that were for sale and paid $10. how many magazines were there in all?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.

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?