The graph of g(x) is the graph of f(x)=x+6 reflected across the x-axis. which equation describes g?

a. g(x)=−x−6
b. g(x)=−x+6
c. g(x)=x−6
d. g(x)=−6x−6

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Math i have no idea how to do a and b