i hope this helps a little bit
Answer:
z = 0
Step-by-step explanation:
3 (z + 7) = 21
3z + 21 = 21
3z = 0
z = 0
(or 0.5) divided by 8 is 0.0625
First you must set up the equation.

Then, divide 0.5 by 8
0.0625
Answer:
The red robins score was higher.
Step-by-step explanation:
This is because, their score was in the postives and the aliens were in the negatives