Help me plz i dont get it its alot ill mark brainliest

Which ahows the graph of the solution set of 6x+4y< 12

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?