Dear!
In my best knowledge,your ans is b.
Answer:

Step-by-step explanation:
we know that
Landon finished 1/2 of the test in 3/5 of an hour
so
by proportion
Find out how much of the test will he have done in one hour

Answer:
-51/82.
Explanation:
Given two points (x1,y1)=(2,21) and (x2,y2)=(84,-30), we find the slope using the formula below:

Substitute the given points:

The slope of the line that passes through the given points is -51/82.