Translate each of these quantifications into English and determine its truth value. a) ∃x∈R (x3 = −1) b) ∃x∈Z (x + 1 > x) c) ∀x∈Z (x − 1 ∈ Z) d) ∀x∈Z (x2 ∈ Z)

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.

The first graph is the answer