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3 years ago

Twice of x diminished by 9 equals 5 times x

Mathematics

1 answer:

Jlenok [28]3 years ago

5 0

Answer:

2x - 9 = 5x

Step-by-step explanation:

This question is asking you to write an equation for the statement given. Twice of x is 2 times x, or 2x. Diminished by 9 means subtracting 9 from 2x, so 2x-9. Finally this is equal to 5x. So, 2x-9=5x.

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3 years ago

PLEASE SOMEONE HELP I TRULY DO NOT UNDERSTAND

IceJOKER [234]

Hi there!

$\large\boxed{f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} } }$

$f(x) = 9x^{3} - 4$

Find the inverse by replacing f(x) with y and swapping the x and y variables:

$x = 9y^{3} - 4$

Isolate y by adding 4 to both sides:

$x + 4 = 9y^{3}$

Divide both sides by 9:

$\frac{x+4}{9}= y^{3}$

Take the cube root of both sides:

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3 years ago

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aniked [119]

Answer:

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Step-by-step explanation:

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3 years ago

A Food Marketing Institute found that 39% of households spend more than $125 a week on groceries. Assume the population proporti

Anuta_ua [19.1K]

Answer:

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Step-by-step explanation:

Given that a Food Marketing Institute found that 39% of households spend more than $125 a week on groceries

Sample size n =87

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and standard error = $\sqrt{\frac{0.39(1-0.39)}{87} } \\=0.0523$

the probability that the sample proportion of households spending more than $125 a week is between 0.29 and 0.41

= $P(0.29$

There is 0.6210 probability that the sample proportion of households spending more than $125 a week is between 0.29 and 0.41

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Step-by-step explanation:

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