Final answer:
The expression 2r+5s, when evaluated for r = -2 and s = -7, results in -39.
Step-by-step explanation:
To evaluate the expression 2r+5s for the given values of r and s (-2 and -7 respectively), we substitute the values into the expression:
2(-2) + 5(-7)
Simplifying, we get:
-4 - 35
Therefore, the expression evaluates to -39.