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nata0808 [166]
3 years ago
7

2x- 3 = 21 what is x?

Mathematics
2 answers:
Gekata [30.6K]3 years ago
6 0

Answer:

12

Step-by-step explanation:

lol! HIIIIIIIIIIIIIIIIIIIIiiiii

hodyreva [135]3 years ago
4 0
Easyyy, you do the opposite
21 + 3 = 24
24/2 = 12
X = 12
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I am factor of 12. The other factor is 3. What number am I
Goryan [66]
12*3= 36

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I hope this helped you! <3
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mafiozo [28]

Answer:

its 10 am I think

Step-by-step explanation:

it says 2 hours until midnight. 12 - 2 = 10

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A brace for a shelf has the shape of a right triangle. Its hypotenuse is 10 inches long and the two legs are equal in length. Ho
vagabundo [1.1K]
This is a classic example of a 45-45-90 triangle: it's a right triangle (one angle of 90) & two other sides of the same length, which means two angles of the same length (and 45 is the only number that will work). With a 45-45-90 triangle, the lengths of the legs are easy to determine:
45-45-90
1-1-sqrt2
Where the hypotenuse corresponds to sqrt2.
Now, your hypotenuse is 10.
To figure out what each leg is, divide 10/sqrt2 (because sqrt2/sqrt2 = 1, which is a leg length in the explanation above).
Problem: you can't divide by radicals. So, we'll have to rationalize the denominator:
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This can be rewritten:
10sqrt2/sqrt(2•2)
=10sqrt2/sqrt4
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3 years ago
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Answer:

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Step-by-step explanation:

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