3 years ago

The circumference of a circle is 157 centimeters. What is the area of the circle in terms

Mathematics

1 answer:

Kruka [31]3 years ago

6 0

The answer is B. I need 20 characters so sorry, jwdsausvndjsdvjvsddcjbcdjadcnahadcjwdn

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3 years ago

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marta [7]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}6x+3y=-21&\text{divide both sides by (-3)}\\2x+5y=5\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-y=7\\2x+5y=5\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=12\qquad\text{divide both sides by 4}\\.\qquad\qquad y=3\\\\\text{Put it to the second equation:}\\2x+5(3)=5\\2x+15=5\qquad\text{subtract 15 from both sides}\\2x=-10\qquad\text{divide both sides by 2}\\x=-5$