The price of a gallon of milk went from $2.70 to $3.50 in four years. find the rate of change of the price of milk.

The price of milk went up $0.20 per year.  

The price went up 20 cents per year

Step-by-step explanation: Subtract 2.7 from 3.5 which equals 0.8 then divide that by 4(the number of years) which equals 0.2 or 20 cents. (The tenths place is the cents)                                                    

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

x=0

step-by-step explanation: