In 8–10, a teacher gave a test with 50 questions, each worth the same number of points. donovan got 39 out of 50 questions right. marci's score was 10 percentage points higher than donovan's. 8. what was marci's score? explain. 9. how many more questions did marci answer correctly? explain. 10. explain how you can check your answers for reasonableness. answer soon !

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14