Answer:
545
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Step-by-step explanation:
Answer:
5cm = r
Step-by-step explanation:
The area of a circle is given by
A = pi r^2
78.5 = 3.14 r^2
Divide each side by 3.14
78.5/ 3.14 = r^2
25 = r^2
Take the square root of each side
sqrt(25) = sqrt(r^2)
5 = r
Answer:
Perimetro = 4 cm + 7 cm + 12 cm
= 23 cm
Step-by-step explanation:
Answer:
3-11n>21-5n
Step-by-step explanation:
It seems right, so hopefully it is.
9x +1= 0
9x/9 +1-1=0
X= 9-1
X= 8