if nyone cn plese do this s fst s possible.
What should be the value of the fourth column?
Rudolph travels at 993 mph on Christmas Eve in order to deliver presents to all the children.
He returns home, over exactly the same distance, at 331 mph.
What is his average speed over the entire journey?
i got p to 662=
Now make three equations with the given
a + 2b +c = 78
2a + b + c = 77
3a +b = 81
Now solve these equations by elimnation.
Then plug the values you found for a,b,c into the equation for the final line
a + b + 2c = ?