# How do you evaluate 5r-8.35s when r=12 and s=4?

Jul 6, 2018

color(crimson)(26.6

#### Explanation:

$r = 12 , s = 4$

$5 r - 8.35 s = \left(5 \cdot 12\right) - \left(8.35 \cdot 4\right)$

$\implies 60 - 33.4 = 26.6$

Jul 6, 2018

$26.6$

#### Explanation:

$\text{substitute the given values for r and s into the expression}$

$\left(5 \times \textcolor{red}{12}\right) - \left(8.35 \times \textcolor{b l u e}{4}\right)$

$= 60 - 33.4$

$= 26.6$

Jul 6, 2018

$26.6$

#### Explanation:

We can just plug the values for the variables in our expression to get:

$5 \textcolor{b l u e}{\left(12\right)} - 8.35 \textcolor{red}{\left(4\right)}$

$\implies 60 - 33.4$

$= 26.6$

Hope this helps!