Final answer:
Andrew's test score would be 64 out of 80 if he got 8 questions wrong. For a general case, if he got x questions wrong, his score would be calculated as 80 - 2x points.
Step-by-step explanation:
Andrew is taking a multiple-choice test that has a total of 80 points with each question worth exactly 2 points. If he got 8 questions wrong, first, we need to calculate the number of questions in the test. Since the total points are 80 and each question is 2 points, there are 40 questions in total (80 points / 2 points per question).
Each wrong answer results in a loss of 2 points, so if Andrew got 8 questions wrong, he would lose 16 points (8 questions × 2 points per question). To find Andrew's score, we subtract the lost points from the total points available which gives us 64 points (80 points - 16 points).
To generalize this for any number x of questions wrong, the formula would be:
Score = Total points - (Number of questions wrong × Points per question)
We apply the formula: Score = 80 points - (x questions wrong × 2 points per question).
So, the final score if Andrew got x questions wrong would be 80 - 2x points.