Q20. - Algebra 1

Question

If $f\left(x\right)=5-2x$ and $g\left(x\right)=x^2+7x$, find each value.

$g\left(3\right)$

Step-by-Step Solution

Answer

The value of the $g\left(3\right)$ is $30$.

Step 1. Given information.

We have a function $g\left(x\right)=x^2+7x$

To find the value of $g\left(3\right)$.

Step 2. Apply the concept.

We substitute the value of the $x=3$ in the given function $g\left(x\right)$ and find the value of $g\left(3\right)$.

Step 3. Calculation.

Substitute $x=3$ in the function $g\left(x\right)=x^2+7x$

$g\left(3\right)=3^2+7\times 3$

$\Rightarrow g\left(3\right)=9+21$

$\Rightarrow g\left(3\right)=30$

Hence, the value of the $g\left(3\right)$ is $30$.