Given cos A = 3/10 and tan A < 0, find sin A

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?