Question

How do you evaluate `30a - 8*3 + 4` for a = 4.6?

Answer 1

`color(green)(118`

Explanation:

Substituting `a=4.6` in the expression gives us:

`30*4.6 -8*3 + 4`

Using the PEMDAS rule, we multiply first, and then add/subtract

`= 138 - 24 + 4`

`= 114+4`

`=color(green)(118`