Alaptop has a listed price of 615.98 before tax. if the sales tax rate is 6.25% , find the total cost of the laptop with sales tax included.

$654.48

Step-by-step explanation:

$615.98 x 0.0625 = $38.50

$615.98 + $38.50 = $654.48

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: