Answer=28%
Assuming you meant to say that 7 of them were blue, and the rest were purple...
7 x
___=___
25 100
cross multiply
25x=700
x=28
The rate of change between 1990 and 1999 is 15.22
Step-by-step explanation:
The rate of change in this case is given by change in quantity divided by change in time
So,

Hence,
The rate of change between 1990 and 1999 is 15.22
Keywords: Rate of change, median
Learn more about median at:
#LearnwithBrainly
Answer:
4x+2
and 22
Step-by-step explanation:
2x-5+6+2x-5+6=4x+2
if x=5, so perimeter 4(5)+2=20+2=22
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