You answer 38 questions incorrectly because you use the part/whole=%/100 so its p/40 = 95%/100 so 40 x 95 = 3800 then divide it by 100 so it is 38 questions.
So we need to plug in our values so now y=4(3)-9 so 4*3 is 12 now we have y=12-9 Subtract 12 and nine to get 3 so y equals 3. The answer is (3, 3). Hope this helped please look at others answers and check other resources as well
