I really need help I'll give

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?

Solve the equation 1. x-3/4=2 4/52. -1/3x-11= -20 3. -12+5/7x= -19

Which equation below is equivalent to sin c=h/a ? a)h= sinc/a b)a=hsinc c)a=sinc/h d)h=asinc