Find the difference of 4 ⅖ and 3 ⅓

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Solve -.016x= -16. need solving this

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?