At the electronics store you have a coupon for 20% off of up to 2 cds. you buy 4 cds with an original cost of $10.99/each. the sales tax is 5%. what is the total cost of your purchase?

The total cost of the purchase = $41.54

Step-by-step explanation:

Let's find the price of 2 CDs because which has 20% discount coupon.

Cost of 2 CDs =   $10.99 × 2 = $21.98

Which has 20% of discount.

Discount = 20% × $21.98 = 0.2 * $21.98 = $4.396 = $4.40 [Rounded off to nearest hundredths place]

Cost of 2 CDs with discount = $21.98 - $4.40 = $17.58

Other 2 CDs with price of $10.99 each.

So, the total price before tax = 2 discounted CDs + 2 without discount price CDs

=  $17.58 + $2*10.99

= $17.58 +$21.98

= $39.56

Now let's find sales tax, which is 5%

Sales tax = 5% × $39.56 = 0.05*$39.56 = $1.978 = $1.98 {rounded off to nearest hundredths place]

So, the total cost of the purchase = $39.56 + 1.98 = $41.54

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2