Icannot understand this at all. for some

1) i bought apples -three for $1.49. what is the unit rate?

2) simplify: 12(5x +-12)

3) the sale price for campbell's soup is 4 for $1.24. how much would it be for six cans of soup?

4) 17+(-28)=

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.