what is the value of -3r + 8 when r = 4?\n-12\n-4\n4\n12

Explanation:

Step1: Substitute r value

Substitute $r = 4$ into $-3r + 8$. We get $-3\times4+8$.

Step2: Calculate multiplication

First, calculate $-3\times4=-12$. So the expression becomes $-12 + 8$.

Step3: Calculate addition

$-12+8=-4$.

Answer:

-4