straight line, slop, and line eauation.
=======================================

1. A line segment is drawn from point (10,20) to th epoint (50,60).
   What are the coordinates of the midpoint of this line segment ?

2. A straight line passing through point (10,20) to th epoint (50,60).
   What is the line equation in standard form ?

3. A line segment is drawn from point (10,20) to th epoint (40,60).
   What is the distance between these two points ?

4. Find the x-intercept and y-intercept of line y = 5x - 20.

5. Find the intersection coordinates of line y = -x + 10 and
   2x + 4y = 24.

6. Find the distance from point (5,6) to line 3x + 4y = 20.

7. Line y = ax + 20 passed point (1,40). What is the value of a ?

8. If 6x + 12 = 9, x * x = ?

9. If x= 3/2 and y=2, then x + y * y - 1/2 = ?

10. 8x + 4 = 64, 2x + 1 = ?