Answer:
24 hours
Step-by-step explanation:
The computation of the number of hours taken by Bobby to build the robot by himself is shown below:
Given that
Bobby could take 12 hours
Together they could build in 8 hours
So based on the above information
the number of hours taken by Bobby to build the robot by himself is
Let us assume the above line be x
So,

x = 24 hours
Answer:
The equation of a line is typically written as y=mx+c where m is the slope and c is the y-intercept.
definition is valid since center is exactly 1radius away from any point on the outersurface.
other figures do not fit this defn