Answer:
To know if it is a function see if there are two of the same x-intercept( which makes a vertical line). If there is,then it is not a function.
Answer:
C is greatest to fraction
Answer:
67-63x
Step-by-step explanation:
Answer:
180 degrees
Step-by-step explanation:
the sum of all the interior angles of a triangle will always be 180 degrees
I wasn't sure whether marked up meant increased or like discounted so ill show you step by step.
10% is $5.
20% would be $10 because it is double the price of 10%.
Therefore if you meant it is 20% more than the original it would be $60.
If you meant it would be 20% less is would be $40.
Sorry its not much help but i wanted to do the best i could.