<u><em>3.95(3) + 8.95b = 47.65</em></u>
<u><em>11.85 + 8.95b = 47.65</em></u>
<u><em></em></u>
<u><em>Subtract 11.85 from both sides.</em></u>
<u><em></em></u>
<u><em>8.95b = 35.8</em></u>
<u><em></em></u>
<u><em>Divide 8.95 from both sides.</em></u>
<u><em></em></u>
<u><em>b = 4</em></u>
<u><em></em></u>
<u><em>Hugh bough 4 books.</em></u>
<u><em></em></u>
Manufacturing cost = $136
sellers added 25% = $ 136 * 25/100 = $34
manufacturers cost + 25% = $136 + $34 = $170.
old selling price = $170
Sellers decreased the markup to 17% (of manufacturing cost): $136 x 17/100 = $23.12
New selling price = $136 + $23.12 = $153.12
both of these answers show: original cost + markup value
The correct answer is a. for very high x-values, f(x) moves towards positive infinity.
This can always be determined by two factors.
1) is it linear or something else?
2) Is the lead coefficient positive or negative.
In this case, since the x is not being raised to a power or is not raised to a power itself, we know that there are no asymptotes. That takes care of #1 for us.
As for #2, since the coefficient of x (which is the highest power here) is positive, that means it continues to get bigger. If it were negative it would be the opposite. So, the correct answer is that as x gets bigger, f(x) moves towards positive infinity.