"Basketball Shots"
Suppose that a basketball player makes free throws 80% of the time. A random number generator was used to simulate 10 rounds of 8 shots each. The numbers 1, 2, 3, and 4 in the simulation represent a successful shot, while the number 5 represents an unsuccessful shot.

from "Basketball Shots"

Which frequency table correctly displays the simulation results?
A.


B.


C.


D.

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.