if 9/20 of a class spoke a second language and 4/5 of those that speak a second language speak spanish, what percentage of the class speaks spanish?

Find the solutions for a triangle with a =16, c =12, and b = 63º

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. the arena wants the probability of being shortlisted to be 0.14. what is this as a percentage and a fraction? what is the probability of not being shortlisted? give your answer as a decimal. those shortlisted are entered into a final game of chance. there are six balls in a bag (2 blue balls, 2 green balls and 2 golden balls). to win, a company needs to take out two golden balls. the first ball is not replaced. what is the probability of any company winning advertising space on their volley ball team jerseys?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?