C the correct answer is C
Answer:
Y=2x-13 ...................
Answer:
Area of circle = πr^2
Area of circle when diameter is 2x; r=x
=πx^2
To solve this problem you must apply the procceddure shown below:
1. You have the following system of equations:
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x+y = 3
2x–y = 6
2. Then, you must clear the variable y from the first equation and susbtitute it into the second equation, as below:
x+y=3
y=3-x
2x-y=6
2x-(3-x)=6
2x-3+x=6
3x=6+3
3x=9
3. Therefore, the value of x is:
x=9/3
x=3
4. As you can see, the correct answer is:
x=9
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Remember the equation to find the circumference?
Equation of circumference: Pi x 2(radius)
Therefore, 3.141592654 x 2(6ft) = 37.7 feet
