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3 years ago

5 more than three times a number is sixty-five. A. write an equation. B.what is the number?

1 answer:

3 0

A.3x+5=65
-5 -5
subtract 5 from 5, subtract 5 from 65 to get 3x=60
B. 3x=60
divide 3x by 3,divide 60 by 3 to get x by itself
x=20

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Answer:

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Step-by-step explanation:

Given:

The chlorine per liter of water in the pool is 2.5 milligrams.

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Now, to find the quantity of chlorine in the pool.

Let the quantity of chlorine be $x.$

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According to question, the amount of chlorine in the swimming pool is proportional to the volume of water.

So, 2.5 mg of chlorine is equivalent to 1 liter.

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Read 2 more answers

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Answer:

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Step-by-step explanation:

Given function.

$f(x)=6x-4$

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Step 1:

Replace $f(x)$ with $y$ in the function.

$y=6x-4$

Step 2:

Interchange $y$ with $x$ in the equation.

$x=6y-4$

Step 3:

Solve for $y$ .

We have $x=6y-4$

Adding 4 to both sides,

$x+4=6y-4+4$

$x+4=6y$

Dividing each term by 6 to isolate $y$

$\frac{x}{6}+\frac{4}{6}=\frac{6y}{6}$

$\frac{x}{6}+\frac{4}{6}=y$

Simplifying fractions by dividing the numerator and denominator by their GCF.

$\frac{x}{6}+\frac{4\div 2}{6\div 2}=y$

$\frac{x}{6}+\frac{2}{3}=y$

Thus the equation of $y$ is:

$y=\frac{x}{6}+\frac{2}{3}$

Step 4:

Replace $y$ with $f^{-1}(x)$

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Thus, we have the inverse function

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3 years ago