William has $27,000 invested in stock a and stock b. stock a currently sells for $30 a share and stock b sells for $90 a share. if stock b doubles in value and stock a goes up 50%, his stock will be worth $49,500. how many shares of each stock does he own?

The table represents a linear function. what is the slope of the function? –6 –4 4 6

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236