A box of 13 floor tiles costs $58.50

find the cost of

a) 26 tiles

b) 20 tiles

a) $117.00 b) $90.00

Step-by-step explanation:

a) you would just multiply 58.50 x 2, because 13 x 2 = 26. Your answer would be $117

b) First you find the cost of one floor tile by dividing 58.50/13. One floor tile costs $4.50. Then you multiply this cost by 20 floor tiles. 20 x 4.50 = 90