Question

evaluate the expression when a = - 7 and c = 2.
a - 4c

Explanation:

Step1: Substitute values

Substitute \(a = - 7\) and \(c = 2\) into \(a-4c\). We get \(-7-4\times2\).

Step2: Calculate multiplication

First, calculate \(4\times2 = 8\). So the expression becomes \(-7 - 8\).

Step3: Calculate subtraction

\(-7-8=-15\).

Answer:

-15