Answer:
The perimeter or circumference of the circle can be found using the equation C=2π(r), where r= the radius of the circle.
Step-by-step explanation:
There are 5 20% in 100% ( 20 x 5 = 100)
So 10% of a number would be 12 x 5 = 60
Then there are 10 10% in 100% ( 10 x 10 = 100).
So if 10% = 60, then 100% = 60 x 10 = 600.
The starting value is 600
600 x 10% = 600 x 0.1 = 60
60 x 20% = 60 x 0.2 = 12
Now you have the starting value you can calculate the other answer:
600 x 20% = 600 x 0.20 = 120
120 x 10% = 120 x 0.10 = 12
The answer would be 12
3x -1 = -8
x + y = 54
x = 11.50 per novel
y = 42.50 per textbook
Step-by-step explanation:
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