I'm not good at graphing, but desmos.com is an online graphing calculator that works really well.
Step by step subtract 20 from both sides and then subtract 20 from 9 to get -11
Answer: C=-11
The graph of x and y = 4 is symmetric with respect to the line x = y.
Therefore, the answer is the second option shown above, which is:
<span>
the line y = x</span>
Below is a graph where you can see the symmetry of xy = 4 with respect to the oblique axis x = y. This axis cuts the curves just at its apex
The answer is A. He can only work 2 more days with 8 hours a day