Question

what happens to the value of the expression $20 + a$ as $a$ increases?
choose 1 answer.
a it increases.
b it decreases.
c it stays the same.

Explanation:

Step1: Test with sample values

Let $a=1$: $20 + 1 = 21$; Let $a=2$ (increased $a$): $20 + 2 = 22$

Step2: Compare results

$22 > 21$, so value rises as $a$ increases.

Answer:

A. It increases.