The expression to evaluate is:

$-15 + (-20) \div 5$

We will follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction):

1. First, perform the division: $-20 \div 5 = -4$

2. Now, substitute $-4$ back into the expression: $-15 + (-4)$

3. Simplify the addition: $-15 + (-4) = -19$

So, the correct result is $-19$, not $-7$.

Would you like more details, or have any questions?

Here are 5 related questions to practice:

1. Evaluate $-30 + (-40) \div 8$.
2. Solve $20 - 15 + (-35) \div 7$.
3. What is $-12 + 36 \div (-6)$?
4. Compute $-5 + (-25) \div 5 \times 2$.
5. Evaluate $10 + (-20) \div (-4)$.

Tip: Always perform division and multiplication before addition and subtraction when evaluating expressions.