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

Jun 24, 2015

color(green)(118

#### Explanation:

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

$30 \cdot 4.6 - 8 \cdot 3 + 4$

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

$= 138 - 24 + 4$

$= 114 + 4$

 =color(green)(118