instructions solve the following problem and choose the best answer. question in a science class each…
instructions solve the following problem and choose the best answer. question in a science class each student starts with 100 points. during the semester, john lost a total of 20 points from exams and 4 points from homework. how many extra credit points would he need to earn to have a total of 85 points at the end of the semester? 1 5 9 15
Answer
Explanation:
Step1: Calculate total points lost
John lost 20 points from exams and 4 points from homework. So the total points lost is $20 + 4=24$ points.
Step2: Find remaining points without extra - credit
Each student starts with 100 points. After losing 24 points, the number of points John has is $100-24 = 76$ points.
Step3: Calculate extra - credit needed
John wants to have 85 points. Let $x$ be the extra - credit points. We set up the equation $76+x = 85$. Solving for $x$, we get $x=85 - 76=9$ points.
Answer:
9