Q57. - Algebra 2

Question

If $f\left(x\right)=2x-5$, then $f\left(0\right)=$

$\text{A} 0.$                             $\text{B}-5.$                    $\text{C}-3.$                     $\text{D} \frac{5}{2}.$

Step-by-Step Solution

Answer

The correct option is B.

Step 1 – Order of operations.

To evaluate any expression involving more than one operation, follow the below order of operations:

• First evaluate expressions inside grouping symbols like parentheses $( )$ or brackets$[ ]$.
• Evaluate the exponents.
• Perform Multiplication and division from left to right.
• Perform addition and subtraction from left to right.

Step 2 – Substitute the given value in the given function.

Substitute $x=0$ in the function $f\left(x\right)=2x-5$.

 $f\left(0\right)=2\left(0\right)-5$

Step 3 – Calculate the value by simplification.

$\begin{array}{l}f\left(0\right)=2\left(0\right)-5\\ f\left(0\right)=0-5\\ f\left(0\right)=-5\end{array}$

If $f\left(x\right)=2x-5$, then $f\left(0\right)=-5$.

Thus, the correct option is B.