What is the range of the following set? 28, 45, 12, 34, 36, 45, 19, 20

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Which expression is equivalent to -5(3x - 6/7)

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out