what- Brandon’s Ink Store is selling black printer ink for $5 a cartridge and color ink for $8 a cartridge. Shelly’s Discount Ink sells the same cartridges for $6 and $7 respectively?
On a given weekday, each store sold $1,680 worth of ink. The profits for that day can be modeled by the equations below.5b + 8c = 1,6806b + 7c = 1,680Are the lines parallel? Answer yes or no.