Question

Choose an expression for John's total points if he answered r short-answer questions correctly.

1. 50 + 2.5r
2. 2.5 + 50r
3. 2.5 + r + 50
4. 50/- 2.5r

Answer 1

The expression that represents John's total points if he answered r short-answer questions correctly is 50 + 2.5r.

Step-by-step explanation:

The expression that represents John's total points if he answered r short-answer questions correctly is 50 + 2.5r.

To understand this, we can break down the expression:

• The constant term 50 represents the points John starts with.
• The coefficient 2.5 represents the number of points John earns for each correct short-answer question.
• The variable r represents the number of short-answer questions John answered correctly.

By multiplying the number of correct answers (r) by the number of points earned for each correct answer (2.5) and adding the starting points (50), we get John's total points.