D. It is not a function because there are multiple outputs for one input.
Answer:
37
Step-by-step explanation:
f(x)=2x²−x+9
f(4)= 2(4)²-4+9
= 32-4+9
= 37
Answer:

Step-by-step explanation:
Two angles are Complementary when they add up to 90°.
Therefore

Answer:
false
Step-by-step explanation:
Plug in the numbers given by the then statements. Plugging in -2 for x gives us -3 >= 3 which is false.