The answer is B by inspection, there really isn't any work to show. You could check every wrong answer to prove it's wrong but that's not needed.
Answer:
1. y = x + 3
2. y = 
x -6
3. y = x - 1
4. y = -2x -2
5. y = 2x - 1
6. y = 
x - 4
7. y = -x
8. y = 
x + 1
Step-by-step explanation:
I'm sorry I couldn't finish it all! I hope this helps. I've been summoned to dinner...
Answer:
12
Step-by-step explanation:
This value would be 2(-1)^2*2(3). I have enclosed the given values of x and y for clarity.
This works out to 2(1)*2(3) = 12.
S is a subset of U, so all of the elements of S must be also elements of U
If U was {letters}, 4, 9, ? would not belong there
If U was {numbers }, x, y, ? would not belong to U
If U was {punctuation marks }, 4, 9, x, y would not be in U
all the elements of S are in U={ keys on a keyboard}
Answer: U={ keys on a keyboard}
