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3 years ago

5.5% tax on a $309.95 purchase

Mathematics

2 answers:

Zina [86]3 years ago

7 0

Answer:

$17.05 tax.

Step-by-step explanation:

multiply 309.95 by .055 to get 17.04725

the tax on a 309.95 purchase is about 17 dollars and 5 cents.

oksano4ka [1.4K]3 years ago

6 0

To find a 5.5% tax on $309.95, you need to multiply them together.

5.5% x 309.9

= 0.55 x 309.9

= 170.445

≈ $170.45

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<u>Step-by-step explanation:</u>

First, set up the equations for each coin:

$\begin {array}{c|c|c|l}\underline{\quad Type\quad }&\underline{Value}&\underline{Quantity}&\underline{\qquad \qquad \qquad Equation\qquad }\\ Nickel& \$0.05&6+d&0.05(6+d) = 0.30 + 0.05d\\Dime& \$0.10&d&\qquad 0.10(d)=0.10d\\Quarter& \$0.25&2d&\qquad 0.25(2d)=0.50d\\\end{array}$

Next, the sum of the coins is $4.85 so substitute and solve for the variable:

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Lastly, plug the d-value into the quantity equation for the nickels and quarters to find their quantity.

nickels: 6 + d = 6 + (7) = 13

quarters: 2d = 2(7) = 14

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