<span>a. y = x^2 – 81 is a quadratic function.
According to the definition:
A quadratic function is defined as a function with the maximum coefficient of 2.Only first option has a coefficient of 2 and the rest have not.</span>
Answer:
No solutions.
Step-by-step explanation:
No solutions because these two lines are parallel.
You can tell by the slopes. Both slopes are equal -3.
The -2 and 
vertically shift the lines.
Answer:
x=6+4
x<10
(-∞,10)
Step-by-step explanation:
Inequalities are the greater than, greater than or equal to, less than, or less than or equal to—between two numbers or algebraic expressions.
