Final answer:
The student answered 18 questions correctly, while their friend answered 17 correctly after rounding down from 17.5. The number sentence representing who answered more questions correctly is 18 > 17, showing the student had more correct answers.
Step-by-step explanation:
To determine who had a greater number of correct answers during a trivia game, we compare the number of correct answers each person got. In the question, it was stated that one student answered 18 out of 25 questions correctly, while a friend answered 0.7 of the questions correctly. To establish a number sentence, first determine the total number of questions that 0.7 represents by multiplying it by the total number of questions.
For the friend: 0.7 × 25 = 17.5, which means the friend answered 17.5 questions correctly, but since one cannot answer half a question correctly in a trivia game, we round down to 17 questions. Comparing the two sets of correct answers:
- Student: 18 correct answers,
- Friend: 17 correct answers.
The number sentence representing who answered more questions correctly is: 18 > 17. Therefore, the student had a greater number of correct answers compared to the friend.