The combined sales tax rate for your county is 7.25%. how much would you pay to purchase a new video game system with a listed price of $299?

easy multiply the sales tax to and from the total cost

Step-by-step explanation:

299*7.25%=321.65

320.68

Step-by-step explanation:

i just got it right

(a) x intercepts: -6 and 2

you can obtain these by solving the equation 0=x^2 +4x-12 using your favorite quadratic formula. but it is easy to verify -6 and 2 indeed satisfy this equation.

(b) y intercept: -12

this is obtained by setting x=0: 0^2+4*0-12 = -12

(c) the minimum value is: -16 (this is the vertex)

you can get the vertex by rewriting the equation into the form:

there is no global or local maximum as the function goes to infinity, so only in the limit sense: +infinity.