This graph is that of a parabola, which in turn represents a quadratic (2nd order) equation, also a polynomial. The domain of any and all polynomial(s) is "the set of all real numbers," or (-infinity, infinity).
Step-by-step explanation:
Recall that

Therefore,

so


$653.84 would be a week's salary if no taxes are figured into the equation
Answer:
x=47°
Step-by-step explanation:
..,........................
<span>The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.</span>