Question

add 7 + (-9).
16
-2
-16
2

Explanation:

Step1: Recall addition of integers

When adding a positive and a negative number, we can rewrite it as subtraction: \(a + (-b)=a - b\) (where \(a,b>0\)). So \(7+(-9)=7 - 9\).

Step2: Perform the subtraction

Since \(9>7\), we find the difference and take the negative sign. \(9 - 7 = 2\), so \(7 - 9=-2\).

Answer:

-2 (corresponding to the option "-2")