Two perpendicular lines intersect at the origin if the slope of the first line is 3,what is the equation of the second line a) y=-3x b) y=1/3x c) y=-1/3x d) y=1/3x+1

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck