Question

Find the value of the expression $3x-1$ for the given values of $x$:
$x=1,5,-6,\frac{3}{7}$

• A. $2,14,-17,\text{and}\frac{2}{7}\text{respectively}$
• B. $2,14,-19,\text{and}\frac{2}{7}\text{respectively}$

Answer 1

The correct option is B $2,14,-19,\text{and}\frac{2}{7}\text{respectively}$

Here the expression is $3x-1$. While evaluating this expression, the operation of multiplication, addition or subtraction should be in correct order.
Input $\left(x\right)$ Output $(3x-1)$

$1$	$3\times \left(1\right)-1=2$
$5$	$3\times \left(5\right)-1=14$
$-6$	$3\times (-6)-1=-19$
$\frac{3}{7}$	$3\times \left(\frac{3}{7}\right)-1=\frac{2}{7}$

$\therefore$ The outputs are $2,14,-19,\frac{2}{7}$ respectively.