evaluate 0.1m + 8 - 12n when m = 30 and n = 1/4.

Explanation:

Step1: Substitute m value

$0.1\times30 + 8-12n$ $= 3+8 - 12n$

Step2: Substitute n value

$3 + 8-12\times\frac{1}{4}$ $=3 + 8 - 3$

Step3: Calculate the result

$3+8 - 3=8$

Answer:

$8$