Chapter 6 - Systems of Equations and Inequalities - 6-3 Solving Systems Using Elimination - Practice and Problem-Solving Exercises - Page 384: 47

The total cost is $5.46

Let x = toothbrush's price y = tube's price t = added tax P = total cost You buy a toothbrush for $\$2.83$ and a tube of toothpaste for $\$2.37$. There is a $5\%$ sales tax. Therefore: $P=x + y +t$ $P=(2.83+2.37)\times 0.05 + 2.83 + 2.37$ $P=0.26 + 2.83 + 2.37$ $P=5.46$