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4 years ago

Which would the phrase twice the difference of a number and five look like as a variable expression

Mathematics

1 answer:

joja [24]4 years ago

4 0

We have to represent the phrase "twice the difference of a number and five" as variable expression.

A variable expression is a mathematical phrase that can contain ordinary numbers, variables (like x or y) with operations as addition, subtraction ,multiplication and division.

Let the number be 'x'.

Twice of a number = $2 \times x = 2x$

The difference of '2x' and 5 = 2x - 5

Therefore, the variable expression representing the given phrase is "2x-5".

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elixir [45]

<h2>At the moment when the radius is 24 centimeters, the volume is increasing at a rate of 2171.47 cm³/min.</h2>

Step-by-step explanation:

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Differentiating with respect to time,

$\frac{dV}{dt}=\frac{d}{dt}\left (\frac{4}{3}\pi r^3 \right )\\\\\frac{dV}{dt}=\frac{4}{3}\pi \times 3r^2\times \frac{dr}{dt}\\\\\frac{dV}{dt}=4\pi r^2\times \frac{dr}{dt}$

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