PHOTOS A photo-book company offers two options. A 12-page hardbound book costs $30 and $0.75 for each extra page. A 12-page soft-back book costs $20 and $1.50 for each extra page. Let x represent the number of extra pages and y represent the total cost. Which system of equations describes the total cost of each option? Responses y=0.75x and y=1.50x y=0.75x and y=1.50x y=0.75x 30 and y=1.50x 20 y=0.75x 30 and y=1.50x 20 y=1.50x 30 and y=0.75x 20 y=1.50x 30 and y=0.75x 20 y=30x 0.75 and y=20x 1.50 y=30x 0.75 and y=20x 1.50