You buy the same number of brushes, rollers and paint cans. write an expression in simples form that represents the total amount of money you spend for painting supplies. paint $21.79
brush $3.99 and paint roller $6.89

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