60.187
this is the answer it just wont let me tell you if I don't have 20 characters.
We have this equation for the slope is: y=mx+b which m is the slope and b is the y-intercept, so we have y=20-15x or y=-15x+20, and we already know that the slope is -15 and y-intercept is 20. As a result, the student's error is that he thinks that 20 is the slope because it is the first number. Hope it help!
There are a lot of numbers you can think of, for example, 1030, or even 9939, but I don't recommend you put that ;)
A is correct because Side PQ of one triangle corresponds to side ST of the other triangle since are located at the same spot.
