The variables x and y vary directly. Use the values to find the constant of proportionality, k. Then write an equation that relates x and y. Write any fractions in the simplest form. y=20; x=12

k =
y =

What is the rotational symmetry of a wheel

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)