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seropon [69]
3 years ago
12

What is the reciprocal of 5 1/4?

Mathematics
1 answer:
KengaRu [80]3 years ago
3 0

Answer: 4/21

Step-by-step explanation: first convert it to an improper fraction, which would be 21/4

reciprocal means flip the fraction so it’s 4/21

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A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y = 5 − x 2 . What are the dimensions
kherson [118]

Answer:

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola

y=5−x^2. What are the dimensions of such a rectangle with the greatest possible area?

Width =

Height =

Width =√10 and Height = \frac{10}{4}

Step-by-step explanation:

Let the coordinates of the vertices of the rectangle which lie on the given parabola y = 5 - x² ........ (1)

are (h,k) and (-h,k).

Hence, the area of the rectangle will be (h + h) × k

Therefore, A = h²k ..... (2).

Now, from equation (1) we can write k = 5 - h² ....... (3)

So, from equation (2), we can write

A =h^{2} [5-h^{2} ]=5h^{2} -h^{4}

For, A to be greatest ,

\frac{dA}{dh} =0 = 10h-4h^{3}

⇒ h[10-4h^{2} ]=0

⇒ h^{2} =\frac{10}{4} {Since, h≠ 0}

⇒ h = ±\frac{\sqrt{10} }{2}

Therefore, from equation (3), k = 5 - h²

⇒ k=5-\frac{10}{4} =\frac{10}{4}

Hence,

Width = 2h =√10 and

Height = k =\frac{10}{4}.

8 0
3 years ago
Match each verbal description to its equivalent function rule as applied to the given function below.
stepladder [879]
The top-left graph goes with the bottom-right equation, y=90(1/4)^x

The bottom-left graph goes with the top-right equation, y = 120(3/4)^x

The top-right graph goes with the bottom-left equation, y = 120(1/4)^x

The bottom-right graph goes with the top-left equation, y = 90(3/4)^x

y=90(1/4)^x has a larger percent decrease than y = 90(3/4)^x
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same with the y = 120(3/4)^x ones
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Answer:

division

Step-by-step explanation:

2x/2=8/2=x=4

x=4

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2 years ago
Cheryl regularly checks her bank account balance online. Yesterday her account balance was $67.12. Today the balance is -$2.56.
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Just by simply adding the two quantities you can get the net change.  $67.12 +(addition sign because we want the net change) $2.56= $69.68.  The last number is the net change!
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Howard pays $327 for one dozen collector's edition baseball cards. About how much does he pay for each baseball card?
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Divide 327 by 12 to get 27.25. Howard pays 27 dollars and 25 cents for each card.
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3 years ago
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