Question

evaluate the expression when a=6 and c=-3. -a + 4c

Explanation:

Step1: Substitute the values of \(a\) and \(c\)

Given \(a = 6\) and \(c=-3\), substitute these into the expression \(-a + 4c\). So we get \(-(6)+4\times(-3)\).

Step2: Perform the arithmetic operations

First, calculate \(-(6)=-6\) and \(4\times(-3)=-12\). Then add these two results: \(-6+(-12)\). Adding two negative numbers, we get \(-6 - 12=-18\).

Answer:

\(-18\)