Answer:
see below
Step-by-step explanation:
The difference of 7 and x is 7-x. The difference of x and 7 is x -7. If you want the positive difference regardless of which (7 or x) is larger, you can make the difference be positive by using the absolute value: |x -7|.
We want numbers such that this difference is 4, so we want the solutions to ...
|x-7| = 4
Answer:
m = -1/3
Step-by-step explanation:
The slope of the line can be calculated using the slope formula.
Since this is the line with points AB, the slope of any line perpendicular to it will be -1/3. All perpendicular lines cross at a 90 degree angle and as such their slopes are the negative reciprocals of each other. This means 3 becomes -1/3.