How to solve 13-5x=-5x+13

Mathematics

1 answer:

igor_vitrenko [27]3 years ago

3 0

Answer:

"all real numbers."

Step-by-step explanation:

Subtract 13 from both sides, obtaining -5x = -5x.

This result is true for all x, so the solution set is "all real numbers."

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A student selecting 3 classes for Winter quarter there are 4 drawing and design courses 3 general education courses and 3 other

pychu [463]

Answer:

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Step-by-step explanation:

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3 years ago

A large washer has an outer radius of 10mm and a hole with a diameter of 14mm. What is the area of the top surface of the washer

choli [55]

<h2>Answer:</h2>

The area of the top surface of the washer is: 160.14 square mm.

<h2>Step-by-step explanation:</h2>

The top of the surface is in the shape of a annulus with a outer radius of 10 mm and a inner radius of 7 mm ( since the diameter of the hole is: 14 mm and we know that the radius is half of the diameter)

Now, we know that the area of the annulus region is given by:

$Area=\pi (R^2-r^2)$

where R is the outer radius and r is the inner radius.

Here we have:

$R=10\ mm\\\\and\\\\r=7\ mm$

Hence, we have:

$Area\ of\ top\ surface=\pi (10^2-7^2)\\\\i.e.\\\\Area\ of\ top\ surface=\pi (100-49)\\\\i.e.\\\\Area\ of\ top\ surface=\pi\cdot 51\\\\i.e.\\\\Area\ of\ top\ surface=160.14\ mm^2$