13. Which expressions are equal? a. 2(x + 3) + 2x and 4x + 3
b. 3(x + 2) + 4x and 7x + 6
C. 5x + 2(x + 4) and 6x + 8
d. 4 + 5(x + 2) and 5x + 11

Larry bar opened a frame shop and completed these transactions: larry started the shop by investing $41,100 cash and equipment valued at $19,100 in exchange for common stock. purchased $180 of office supplies on credit. paid $2,300 cash for the receptionist's salary. sold a custom frame service and collected $5,600 cash on the sale. completed framing services and billed the client $310. what was the balance of the cash account after these transactions were posted?

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Common binomial factor of 6x(3x+7)+5(3x+7)