Sum of the digits of a two digit number is 9 when we interchange the resulting no is greater than the original number
find the number?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

What is the radius of the cone in the diagram? round your answer to the nearest whole number