If 4x-3y =10, what is the value of 12x-9y?

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?