Evaluate the expression for r = 3, s = 9, and t = –15.6.

Question

Write your answer as a decimal or whole number.

rs + t − 7.7

Answer 1

To evaluate the expression \( rs + t - 7.7 \) for \( r = 3 \), \( s = 9 \), and \( t = -15.6 \), we can follow these steps:

1. Calculate \( rs \): \[ rs = 3 \times 9 = 27 \]

2. Substitute \( rs \) and \( t \) into the expression: \[ 27 + (-15.6) - 7.7 \]

3. Simplify: \[ 27 - 15.6 - 7.7 \]

4. First, calculate \( 27 - 15.6 \): \[ 27 - 15.6 = 11.4 \]

5. Next, subtract \( 7.7 \): \[ 11.4 - 7.7 = 3.7 \]

Therefore, the value of the expression is \( \boxed{3.7} \).