The coefficient of the second term is 18.
What you do is you FOIL the terms:
$138.47. Since you have 100 euros and each euro is worth 1.3847 dollars, you would multiply the 100 by 1.3847 to get the answer of $138.47
The answer is 319.923
390.15 multiplied by .82 is how you get the answer.
Well, the absolute value of a number would always be positive, which means the dots on the line is going to be on the right side of 0. In the choices, the only number line that qualifies is C.