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3 years ago

How to write as equation, the product of 7 and a number

Mathematics

2 answers:

mote1985 [20]3 years ago

8 0

Let us say that "a number" is x. If you were to do this, then the product of 7 and a number, x would be 7x.

BlackZzzverrR [31]3 years ago

5 0

You would consider it as "7n=x" as n is the undefined number and since it is an equation, it must have an equal sign, so x is the product.

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Step-by-step explanation:

This is an example of a related rate problem. A related rate problem is a problem in which we know one of the rates of change at a given instant $\frac{dx}{dt}$ and we want to find the other rate $\frac{dy}{dt}$ at that instant.

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If we apply implicit differentiation in the formula of the distance we get

$s=\sqrt{x^2+y^2}\\\\s^2=x^2+y^2\\\\2s\frac{ds}{dt}= 2x\frac{dx}{dt}+2y\frac{dy}{dt}\\\\\frac{ds}{dt}=\frac{1}{s}(x\frac{dx}{dt}+y\frac{dy}{dt})$

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