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lisov135 [29]
3 years ago
13

Laura bought 4 CDs that were each the same price. Including sales tax, she paid a total of $68.40. Each CD had a tax of $0.60. W

hat was the price of each CD before tax?
Mathematics
1 answer:
brilliants [131]3 years ago
6 0

Answer:

The right answer is $16.50

Step-by-step explanation:

68.40- 2.40 = 66.00

66.00 divide by 4 = 16.50

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Given CD is an altitude such that AD=BC , AB=3 cm and CD= √2 cm.

Let AD=x, Since given AB=3

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Since ΔBCD is rght angle triangle, let's apply Pythagoras theorem

BC^{2} = DB^{2} +CD^{2}

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Let us apply Pythagoras theorem for ΔACD

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AC=\sqrt{\frac{193}{36} } = 2.315cm

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Step-by-step explanation:

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