Question

c. nine cold cubes were adde
-9 + -2 =
d. ten cold cubes were addec

Explanation:

Step 1: Recall the rule for adding two negative numbers.

When adding two negative integers, we add their absolute values and keep the negative sign. The absolute value of \(-9\) is \(9\) and the absolute value of \(-2\) is \(2\).

Step 2: Perform the addition of the absolute values.

Add the absolute values: \(9 + 2=11\).

Step 3: Apply the negative sign.

Since both numbers are negative, the result will be negative. So, \(-9+(-2)=-(9 + 2)=-11\).

Answer:

\(-11\)