I equals 70 grams cup because
Domain is everything below 0. Range is all real numbers. It is a function as it passes the vertical line test.
Additive Identity.
When a number (x) added to zero it will give the number itself as the result.
X + 0 = X
74 + 0 = 74
1
The variable in this case is v, and no coefficient is given, so it can be assumed to be 1.
The given matrix represent the following linear system
4x - 7y = -12
-14x + 4y = 4
Good luck!!!