(1) let there be x book and let the total cost be y dollars.
y=19.25x+40
y=16x+69.25
(2) 19.25x+40=16x+69.25
3.25x=29.25
x=9
9 silver book, 9 gold book.
(3) y=19.25x+40=19.25*9+40=213.25 dollars
both companies' total cost are 213.25 dollars.
Answer:
4.5
Step-by-step explanation:
13.5 - 9 = 4.5
18 - 13.5 = 4.5
22.5 - 18 = 4.5
2•2x= 4x
2•3y=6y
4x+6y=4x+6y
-4x -4x
6y=6y
-6y -6y
0=0
650 x 85% = $552.5
You deduct the coupon percentage from the whole which is 100% and then multiply it by the whole price.