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Darya [45]
3 years ago
5

If z varies inversely as x^2, and z = 9 when x = 2/3, find z when x = 5/4

Mathematics
1 answer:
zimovet [89]3 years ago
6 0

Answer:

Step-by-step explanation:

z varies inversely

so z=a/x^2

9=a/(2/3)^2

9=a/(4/9)

9=9a/4

a=4

z=4/x^2

z=4/(5/4)^2

z=4/(25/16)

z=64/25

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Answer:

Simplify the expression.

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A car is traveling 150 feet per second. Convert this to miles per hour.
Nana76 [90]

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Multiply feet per second by 3600 to get feet in 1 hour:

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Divide feet per hour by 5280 to get miles per hour:

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yawa3891 [41]

Answer:

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Step-by-step explanation:

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3 years ago
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Divide. −4 1/3 ÷ −2 3/5 A. 1 2/3 B. 1 4/5 C. 2 1/5 D. 2 3/5
Inga [223]

a. 1 \frac{2}{3}

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7 0
3 years ago
You need to design a rectangle with a perimeter of 14.2 cm. The length must be 2.4 cm. What is the width of the
irina1246 [14]

Part (a)

<h3>Answer: 2(2.4+w) = 14.2</h3>

--------------

Explanation:

L = 2.4 = length

W = unknown width

The perimeter of any rectangle is P = 2(L+W)

We replace L with 2.4, and replace P with 14.2 to get 14.2 = 2(2.4+w) which is equivalent to 2(2.4+w) = 14.2

========================================================

Part (b)

<h3>Answer:   w = 4.7</h3>

--------------

Explanation:

We'll solve the equation we set up in part (a)

2(2.4+w) = 14.2

2(2.4)+2(w) = 14.2

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The width must be 4.7 cm.

4 0
3 years ago
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