Can somebody help me with this problem .. I’ll really appreciate it .

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?