The answer is z=2m+3 so the first one is right
The -3-4 that should be done first
1199.3 (I'm assuming you mean round to the nearest tenth)
The domain would be -2, the x-intercept.
There are many solutions. But what do you mean with a perfect square of a number. I thought a number IS a perfect square or not.
For example, the difference between 2² and 4² = 12, which is twice the number 6, which is √36
The difference between 2² and 6² = 32, which is twice the number 16, which is a perfect square.
So choose depending on your interpretation of the question... ;-)
