Can someone please help me with this and tell me how to work it out

How many grams must be adde to 970g to make 1 and a half kg

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.