Question

Evaluate the expression when x = -2 and y = -4
-4x + 7y

Answer 1

To evaluate the expression \(-4x + 7y\) when \(x = -2\) and \(y = -4\), follow these steps:

1. Substitute the values of \(x\) and \(y\) into the expression:
\[
-4(-2) + 7(-4)
\]

2. Calculate \(-4(-2)\):
\[
-4 \times -2 = 8
\]

3. Calculate \(7(-4)\):
\[
7 \times -4 = -28
\]

4. Now combine the two results:
\[
8 + (-28) = 8 - 28 = -20
\]

Thus, the value of the expression \(-4x + 7y\) when \(x = -2\) and \(y = -4\) is \(\boxed{-20}\).