Karin wants to use the distributive property to mentally find the value of 19 x 42 + 19x 58. Which expression can she use?

19 x (42 + 58) or 19 * (42 + 58) is the expression she can use. You factor out the common term 19. The distributive rule says that we can multiply the outer 19 with each term inside to get the original expression again.