Breinor needed some school supplies to finish out the year. His mom bought him a 3-pack of pens for $3.59, a pack of highlighters for $5.15, and two notebooks for a $1.99 each. The sales tax is 8%. What was the total price she paid including tax? $12.72 $12.72

$13.74
$13.74

$10.73
$10.73

$11.59

13.74

Step-by-step explanation:

3.59+5.15+1.99+1.99=12.72 total without tax

12.72x1.08 (includes 8% sales tax)=13.74

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,