I Need Help With My Geometry Homework Please! Its Due Tomorrow

Im taking a summer class.. And need some help on some of the problems. Here are the problems listed below:

Find the precision for each measurement.

3.) 120 meters 4.) 7 1/4 inches 5.) 30.0 millimeters


Find the value of the variable and KL if K is between J and L.

9.) JK=6r, KL=3r, and JL=27 10.) JK=2s, KL=s+2, and JL=5s-10


Find the coordinates of the midpoint of a segment having the given endpoints.

9.) A (0,0), B (12,8)

10.) R(-12,8),S(6,12)

11.) M(11,-2),N(-9,13)

12.) E(-2,6),F(-9.3)

13.)S(10,-22),T(9,10)

14,(M-11,2),N(19,6)

Thank You For Your Help, What ever questions you cant answer just leave them blank. :)

9.) R = 3. KL = 9
10.) S = 6. KL = 8
9.) (6, 4)
10.) (-3, 9)
11.) (1, 5.5)
12.). (-5.5, 4.5)
13.). (9.5, -6)
14.). (4, 4)

Sorry but I forgot how to do numbers 3,7 and 5 ...