The answer is 1 in 10 or 10%
The Correct choice is <u>Substition method</u> , as we can directly substitute the value of y from first equation to the second equation.
The radius of a circle is always half its diameter.
Therefore the radius of a circle with a diameter of 121 inches is 1/2(121).
Hence, the correct answer is r = 1/2 (121)
The √125 can be factored out to 25 and 5 then 25 can be factored out to 5 and 5. Then you pair up the numbers, you have a pair of 5's and a 5 left over. So the pair of 5's goes inside the radical as √5 and on the outside of the radical you have 5×3. So 3√125≈15√5.
