Answer:
3) 2.7
Step-by-step explanation:
The distance between two points
and
can be determined by:

Since the points are X(1, 2) and Y(6, 7). The distance between the two points is

the x value for the point located 1/3 the distance from X to Y,

The x value = 
Answer:
16=9+m m=7
Step-by-step explanation:
m=7 makes the equation true
12.89 can be written as 1289/100, hence its a rational number.