Many places in Louisiana have a 10% sales tax. Talal buys a coat for $45 and has a 10% coupon that he uses. After that, he pays the 10% sales tax. Calculate how much Talal pays for his coat after discount and tax.

$44.55

Step-by-step explanation:

$45 times the 10% sales tax equals $49.50

$49.50 minus the 10% discount equals $44.55

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: