<p>These are from the practice questions at the beginning of the book, before the practice tests. </p>
<p>Page 338, #10.</p>
<p>Page 340, #15.</p>
<p>I had a lot of trouble finding the answers to those two questions, so I was wondering if anyone could help me out.</p>
<h1>10</h1>
<p>B because (x+1) must be positive.
(x+1)^(3/4) = [(x+1)^3]^(1/4)
The exponent 1/4 is the same as taking the 4th root of the number. And taking the 4th root of a number is the same as taking the square root twice. You cannot take the square root of a negative number and therefore (x+1) must be positive.</p>
<h1>15</h1>
<p>A. Just rotate the graph 90 degrees counterclockwise. That is what the graoh would look like if the x and y was switched. The equation of a parabola you should know. To have the point shown, there must be a -1 in the equation.</p>
<p>That makes sense. Thanks!</p>