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marshall27 [118]
3 years ago
12

Hep me with this question

Mathematics
1 answer:
nasty-shy [4]3 years ago
6 0

x=3 for both of the questions

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Given that y varies inversely with x, if x =7 and y = 4, what is y when x = 2?
AysviL [449]

Answer:

y = 14

Step-by-step explanation:

y ∝ \frac{1}{x}

=> y = \frac{k}{x}     -------------(1)

<em><u>Where k is the constant of proportionality</u></em>

Now,

x = 7, y = 4

<em>Putting in (1)</em>

4 = \frac{k}{7}

So,

=> k = 28

Now y = ? when x = 2

<em>Putting x and k in (i)</em>

y = \frac{28}{2}

y = 14

3 0
3 years ago
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A rectangular room has an area of 120 square feet. a. The length of the room is 15 feet. Find the perimeter of the room. The per
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Since the area is 120 ft^2, and we know the length of the room is 15 ft, we can calculate the width.

120/15 = 8

To find the perimeter, we use the following formula

2l + 2w = P

2 (15) + 2 (8) = 46 ft
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3 years ago
How to answer a problem that says 5 ro the 4 power over 5
Eddi Din [679]

\bf ~~~~~~~~~~~~\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} \qquad \qquad \cfrac{1}{a^n}\implies a^{-n} \qquad \qquad  a^n\implies \cfrac{1}{a^{-n}} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{5^4}{5}\implies 5^4\cdot 5^{-1}\implies 5^{4-1}\implies 5^3\implies 125

4 0
3 years ago
Select the correct answer
Tcecarenko [31]

Answer:

C. 150

Step-by-step explanation:

It's right on Plato.

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3 years ago
1 meter is times as long as 1 decimeter
anzhelika [568]

Answer:

10

Step-by-step explanation:

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4 years ago
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