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3 years ago

about how much would it cost to buy 4 CD/MP3 players and 3 MP3 players... CD Players $74.00... MP3 $99.00

Mathematics

2 answers:

Shkiper50 [21]3 years ago

7 0

CD Players: $296
MP3 Players: $297

Why would either of those cost that much though?

Alinara [238K]3 years ago

4 0

If buying 1 CD player costs $74 and an MP3 player cost $99 dollars, then 74x4= $296 for 4 CD players, and 99x3= $297 for 3 MP3 players

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A 15 foot ladder is leaning against a wall. if the top slips down the wall at a rate of 4 ft/s, how fast will the foot be moving

hoa [83]

<span>From the pythagorean theorem, we know that x^2 and y^2 = 15^2, where x and y, where x is the base moving from the wall and y is the distance of the ladder sliding down. This means that y = sqrt(225 - x^2). Plugging in x = 13 gives us y = 2sqrt(14). Differentiating both sides of the original equations gives us dy/dt = 13 x 4 / 2sqrt(14) = 52/2sqrt(14) = 26/sqrt(14) ft/s.</span>

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3 years ago

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aleksandrvk [35]

Answer:

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Step-by-step explanation:

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2 years ago

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Ivanshal [37]

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3 years ago

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Plz help me!!! I need this answered correctly and with explanation!!! <br> Solve z/−8 ≥ −0.25

Svetlanka [38]

Answer:

z≤2

Step-by-step explanation:

Step 1: Simplify both sides of the inequality.

−1/8z≥−0.25

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3 years ago

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Item 19 The scale on a map is 1 cm:30 mi. The distance on the map between San Francisco, CA, and Chicago, IL, is 61.9 cm. What i

Harlamova29_29 [7]

Answer:

1857 miles.

Step-by-step explanation:

We have been given that the scale on a map is 1 cm:30 mi. The distance on the map between San Francisco, CA, and Chicago, IL, is 61.9 cm. We are asked to find the actual distance between San Francisco and Chicago.

We will use proportions to solve our given problem.

$\frac{\text{Actual distance}}{\text{Map distance}}=\frac{30\text{ miles}}{1\text{ cm}}$

Upon substituting map distance between San Francisco and Chicago, we will get:

$\frac{\text{Actual distance}}{61.9\text{ cm}}=\frac{30\text{ miles}}{1\text{ cm}}$

$\frac{\text{Actual distance}}{61.9\text{ cm}}\cdot 61.9\text{ cm}=\frac{30\text{ miles}}{1\text{ cm}}\cdot 61.9\text{ cm}$

$\text{Actual distance}=30\text{ miles}\cdot 61.9$

$\text{Actual distance}=1857\text{ miles}$

Therefore, the actual distance between San Francisco and Chicago is 1857 miles.

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3 years ago