Presley is organizing the school book sale. each stall will have 40 books on the shelf and 2 boxes of books with b books inside. presley also has 200 books in inventory to refill the shelves as books sell. this situation can be written as the following expression:
40s + (2b)s + 200
how many books should presley have ready if she plans to open 8 stalls and have 12 books in each box?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14