Question

find the sum.
the sum (c - 4) + (3c + 9) is \boxed{}.

Explanation:

Step1: Remove parentheses

To find the sum of \((c - 4)+(3c + 9)\), we first remove the parentheses. Since there are no negative signs outside the parentheses that would change the signs inside, we can rewrite the expression as \(c - 4+3c + 9\).

Step2: Combine like terms

Next, we combine the like terms. The like terms with \(c\) are \(c\) and \(3c\), and the constant terms are \(-4\) and \(9\). Combining the \(c\) terms: \(c+3c = 4c\). Combining the constant terms: \(-4 + 9=5\). So the simplified expression is \(4c + 5\).

Answer:

\(4c + 5\)