What does "⋅" mean in math..

Mathematics

2 answers:

nikklg [1K]3 years ago

6 0

That dot means multiplication

Vitek1552 [10]3 years ago

5 0

Hi!

It is another multiplication sign. There are a few multiplication signs. Here are what they look like:

Hope this helps! :)

-Peredhel

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Twice a number decreased by 8 by 12 is 2 less than half the number what is the number?

natali 33 [55]

Answer:
4
Step-by-step explanation:
with the information given, we can express the equation:

where is the unknown number?
to clear for first we multiply the equation by 2, to eliminate the fraction:

moving all terms with to the left:

and adding +16 to each side:

and finally, dividing by 3

the number is 4.

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What is the area of this figure? Part 4 NO LINKS!!!

Vlad [161]

<h3>Answer: 414 square yards</h3>

========================================================

Explanation:

Surround the entire figure in a bounding rectangle as shown below.

This surrounding rectangle is 23 by 27. It's total area is 23*27 = 621 square yards.

For a moment, let's ignore the 3x3 section marked in the dashed lines. The empty space in the bottom left corner is 15+3 = 18 by 9+3 = 12. Its area is 18*12 = 216 square yards. Accounting for the dash line 3x3 section means we subtract 9 from the 216 to get 216-9 = 207. The empty space takes up 207 square yards.

So the purple region must take up 621-207 = 414 square yards