Question

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

• A. $2,14,-19,\frac{2}{7}$
• B. $2,14,19,\frac{2}{7}$
• C. $2,14,29,\frac{2}{7}$
• D. $2,14,39,\frac{2}{7}$

Answer 1

The correct option is A $2,14,-19,\frac{2}{7}$

$x=\{1,5,-6,\frac{3}{7}\}$

Expression : $3x-1$

When we take $x=1,$ output $3x-1=\left(3\right)\left(1\right)-1=3-1=2$

When we take $x=5,$ output $3x-1=\left(3\right)\left(5\right)-1=15-1=14$

When we take $x=-6,$ output $3x-1=\left(3\right)(-6)-1=-18-1=-19$

When we take $x=\frac{3}{7},$ output $3x-1=\frac{3\left(3\right)}{7}-\frac{7}{7}=\frac{9-7}{7}-=\frac{2}{7}$

So,

$x$	$\to$	$3x-1$
$1$	$\to$	$2$
$5$	$\to$	$14$
$-6$	$\to$	$-19$
$\frac{3}{7}$	$\to$	$\frac{2}{7}$

$3x-1=\{2,14,-19,\frac{2}{7}\}$