<p>I feel embarrassed answering these questions incorrectly, but here I go:</p>
<p>Pg. 412</p>
<p>Question 17
In the xy-coordinate plane, the graph of x=(y^2) -4 intersects line "l" at (0,p) and (5,t). What is the greatest possible value of the slope of "l"?</p>
<p>The answer is 1. How do you get 1?</p>
<p>Question 18
Esther drove to work in the morning at an average speed of 45 miles per hour. She returned home in the evening along the same route and averaged 30 miles per hour. If Esther spent a total of one hour commuting to and from work, how many miles did Edther drive to work in the morning?</p>
<p>The answer is 18. How do you get 18?</p>
<p>Thanks.</p>