The mean number of sales of PS5's at an electronics store per day is 10 with a standard deviation of 2. What is the probability that more than 13
will be sold on a randomly selected day?

Find the solution of system of equation y= x-4 y=4x+2

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

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