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saw5 [17]
3 years ago
10

A used book store also started selling used CDs and videos. In the first week, the store sold 40 used CDs and videos, at 4.00 pe

r CD and 6.00 per video. The sales for both CDs and videos totaled to 180.00.
Mathematics
1 answer:
masha68 [24]3 years ago
4 0

Answer:

30 CDs and 10 Videos were sold.

Step-by-step explanation:

Given that a used book store also started selling used CDs and videos. In the first week, the store sold 40 used CDs and videos, at 4.00 per CD and 6.00 per video.

The sales for both CDs and videos totaled to 180.00.

Let CDs be x and Videos be y

Then we have x+y =3040

and 4x+6y = 180

Two simultaneous equations in two variables and can be solved by elimination method

multiply I equation by 4 and subtract from II.

2y = 20

y =10

x = 30

30 CDs and 10 Videos were sold.

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EleoNora [17]

Answer:

.90(85.00) would give the same result

Step-by-step explanation:

Rhonda is using the total cost of the item ($85.00) multiplied by the discount (10%) to find the total discount:  85 x 0.10 = 8.50.  Once Rhonda subtracts the discount ($8.50) from the total:  $85 - $8.50 = $76.50.  The other way to look at the problem, is that Rhonda is only paying for 90% of the total cost of the items, instead of 100% since she is receiving the 10% discount.  So, she would get the same final total by multiplying the cost of the items ($85.00) by 90%, or 0.90.  

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3 years ago
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Answer:

Table B

Step-by-step explanation:

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3 years ago
What is 17+6-6+6 divided by 6 + 17.
alina1380 [7]

Answer:

\boxed{\bold{1}}

Using Pedmas rule:

\dashrightarrow \sf \dfrac{17+6-6+6}{6+17}

<u>subtract: 6-6 = 0</u>

\dashrightarrow \sf \dfrac{17+6}{23}

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4 0
3 years ago
Read 2 more answers
If Usain Bolt can run a marathon (26.2) in 2 hours and 15 minutes, how fast would he run if he ran at the same constant rate?
inn [45]

Answer:

The speed of Usain Bolt is 0.194 miles per minutes to complete the marathon.

Step-by-step explanation:

Given as :

The Distance of marathon = 26.2 unit

The time taken to complete marathon = 2 hours and 15 minutes

                                                                = 120 + 15 = 135 minutes

Let The constant speed of Usain Bolt = S unit per minutes

So, Speed = \frac{Distance }{Time}

Or, S  = \frac{26.2 }{135}

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3 years ago
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Answer:

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Step-by-step explanation:

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Convert into scientific notation:

1.98 × 10^10

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