Three classmates are working with three different expressions. Each classmate substitutes in the value x = 4 into their expression.

Answer 1

Sure! Let's denote the three classmates as Classmate A, Classmate B, and Classmate C, and let’s assign them the following expressions:

1. Classmate A: \( f(x) = 2x + 3 \)
2. Classmate B: \( g(x) = x^2 - 5x + 6 \)
3. Classmate C: \( h(x) = \frac{1}{x} + 2 \)

Each classmate substitutes \( x = 4 \) into their expression:

1. Classmate A: \[ f(4) = 2(4) + 3 = 8 + 3 = 11 \]

2. Classmate B: \[ g(4) = (4)^2 - 5(4) + 6 = 16 - 20 + 6 = 2 \]

3. Classmate C: \[ h(4) = \frac{1}{4} + 2 = 0.25 + 2 = 2.25 \]

To summarize, the results of their calculations are:

• Classmate A: \( 11 \)
• Classmate B: \( 2 \)
• Classmate C: \( 2.25 \)