Dewayne missed four of the 30 problems on the problem set. What percent of the problems did Dewayne answer correctly? (answer with a fraction for the remainder)

The percent of the problems did Dewayne answer correctly = 86.6%

Step-by-step explanation:

Given DeWayne missed four of the 30 problems on the problem set

let "E" be the event of missing problem set P(E) =

Let be the event of DeWayne answer correctly

                                                        P() = 1 - p(E)

                                                                   =

                                                                    =

                                                                    =   = 0.866

The percent of the problems did Dewayne answer correctly = 86.6%

answer: x=60

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q