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3 years ago

Twice a number is 17 Write it as an equation

Mathematics

1 answer:

BigorU [14]3 years ago

5 0

The answer would be
~2*x=17~

Hope this helps

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Step-by-step explanation:

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3 years ago

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4 years ago

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Can you please help me

Karolina [17]

Answer:

214d or (159+55)d

Step-by-step explanation:

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3 years ago

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Multiply by _ 3 9 10 _ 8 24

Viktor [21]

Answer:

Multiply by 3

10 × 3 = 30

Step-by-step explanation:

Multiply by x

3x = 9

10x = y

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3 years ago

Y is inversely proportional to the square root of x if y=3 when x=25 find y when x is 9

irga5000 [103]

Answer:

$y=5$

Step-by-step explanation:

$\textsf{If }y \textsf{ is \underline{inversely proportional} to the square root of }x, \textsf{ then}:$

$y \propto\dfrac{1}{\sqrt{x}} \implies y=\dfrac{k}{\sqrt{x}}\quad \textsf{(where k is some constant)}$

$\textsf{When }x=25, y = 3:$

$\implies 3=\dfrac{k}{\sqrt{25}}$

$\implies 3=\dfrac{k}{5}$

$\implies k=15$

Inputting the found value of k into the equation:

$\implies y=\dfrac{15}{\sqrt{x}}$

To find the value of y when x is 9, substitute x = 9 into the found equation:

$\implies y=\dfrac{15}{\sqrt{9}}$

$\implies y=\dfrac{15}{3}$

$\implies y=5$

8 0

2 years ago