In 1930 the average cost for a gallon of gasoline was $0.25. in 2007 the average cost for a gallon of gasoline is $2.60 what is the percent of increase rounded to the nearest whole number

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Can someone me and do the problem plz so i can understand it more better

Graph y = -|x| + 2. click on the graph until the correct one appears.