Martha is the cost manager for a large theater company. her custom inventory includes a number of different hats.
(helmets 34)
(sailors cap 3)
(bowlers 5)
what is the probability that a randomly chosen hat from Marthas inventory will be a sailors cap.
write your answer as a fraction or a whole number.
P( sailor’s cap ) = (blank)

4should be the last one n=4

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.