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3 years ago

8

Salma bought 3 CDs that were each the same price. Including sales tax, she paid a total of $44.70. Of that total, $2.10 was the

tax. What was the price of each CD before tax?

1 answer:

Bad White [126]3 years ago

4 0

44.7-2.10= 42.6
42.6/3= 14.20
Each CD costs $14.20

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Step-by-step explanation:

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3 years ago

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Answer: $\bold{9)\ \sin \theta=\dfrac{1}{3}\qquad 10)\ \sin \theta = \dfrac{4}{5}\qquad 11)\ \cos \theta = \dfrac{\sqrt{11}}{6}\qquad 12)\ \tan \theta = \dfrac{17\sqrt2}{26}}$

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

Pythagorean Theorem is: a² + b² = c² , <em>where "c" is the hypotenuse</em>

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$9)\ \sin \theta=\dfrac{\text{side opposite of}\ \theta}{\text{hypotenuse of triangle}}=\dfrac{4}{12}\quad \rightarrow \large\boxed{\dfrac{1}{3}}$

Note: 4² + (8√2)² = hypotenuse² → hypotenuse = 12

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Note: 12² + opposite² = 20² → opposite = 16

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Note: adjacent² + 5² = 6² → adjacent = √11

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3 years ago

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Step-by-step explanation:

In order for the number to be divisible by 9, the sum of it's digit has to be divisible by 9.

In our case, $4+A+A+1= 9k$ where k is an integer. the easiest way happens when k=1

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Higher values of k will likely most work (with k=2 you get A to be a non-integer, which can't work since it's the digit of a number, and with higher values of K you're not getting a number in base 10.

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2 years ago

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