Answer:
124.375% increase
Step-by-step explanation:
From 1980 to 2010 there was a 124.375% increase
Add five to both sides
-3x = 21
Divide by -3 on both sides
x = -7
#7 is correct coplaner because I had that same work in class and the teacher gave us the answers to all of them
Step-by-step explanation:
(i hope this helps)
speed=distance/time taken