Mean=np
36=(0.12)n
n=300
300 students were surveyed.
That's the way I answer in my country but I'm not sure about this solution is correct in your school or not.
It will be 0.6 hope this helps
[ Answer ]
[ Explanation ]
-3(n + 5) = -21
Divide Both Sides By -3
= 
Simplify:
N + 5 = 7
Subtract 5 From Both Sides:
N + 5 - 5 = 7 - 5
Simplify:
N = 2
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They are both similar because you just have to multiply 7 x 2 and then add the zeros. 7 x 20 is 140 and 7 x2000 is 14000
Answer:
Step-by-step explanation:
As each exterior angle is 45o , number of angles or sides of the polygon is 360o45o=8 . Further as each exterior angle is 45o , each interior angle is 180o−45o=135o .
