Mathematics, 30.07.2020 07:01, sweetbri7p5v6tn

Thalia, a quiz show contestant, answered 20 questions. She was awarded 2 points for every correct answer that she gave, but she was penalized 1 point for every incorrect answer. In the end, Thalia had a total of 28 points. In order to determine the number of correct and incorrect answers that she gave, a viewer at home used the system of linear equations x + y = 20 and 2 x + y = 28, with x being the number of correct answers and y being the number of incorrect answers. The viewer solved the system by using the linear combination method as shown. x + y = 20. + StartFraction Negative 2 x minus y = negative 28 over Negative x = negative 8 EndFraction. StartFraction negative x Over negative 1 EndFraction = StartFraction negative 8 Over negative 1 EndFraction. X = 8. 8 + y = 20. 8 + y minus 8 = 20 minus 8. y = 12. The viewer calculated that the contestant answered 8 questions correctly and 12 questions incorrectly. What went wrong?

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 20:10, jaidencoolman2866

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m

Answers: 1

continue

Mathematics, 22.06.2019 01:50, vorhees2406

If jklm is a trapezoid, which statements must be true?

Answers: 1

continue

Mathematics, 22.06.2019 05:40, cowerdwhisper23

Module 2 homework: descriptive statistics 40206 module 2: homework 56 randomly selected students were asked how many siblings were in their family. let x represent the number of pairs of siblings in the student's family. the results are as follows: # of siblings 1 2. 4 10 frequency 13 6 10 10 round all yeur answers to 4 decimal places where possible. the mean is: the median is the sample standard deviation is the first quartile is the third quartile is: what percent of the respondents have at least 3 siblings? % 83% of all respondents have fewer than how many siblings?

Answers: 3

continue

Mathematics, 22.06.2019 06:00, Rocko420

Lines a and b are perpendicular. the equation of line a is y=13x+3. what is the equation of line b?

Answers: 1

continue

Do you know the correct answer?

Thalia, a quiz show contestant, answered 20 questions. She was awarded 2 points for every correct an...