A set of average city temperatures in May are normally distributed with a mean of 20.66 degrees C and a standard deviation of 2 degrees C The average temperature of Singapore is 26°C. What proportion of average city temperatures are lower than that of Singapore ?

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Can someone me with these two circle theorem questions asap?

How are sas and sss used to show that two triangles are congruent?