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Xelga [282]
3 years ago
11

What are the rules?​

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
8 0

3rd row 420 | 21

4th row 20 | 1

5th row 100 | 5

6th row 1000 | 50

7th row 350 | 17.5

constant is 20

NISA [10]3 years ago
4 0

Answer:

See below

Step-by-step explanation:

3rd row 420 | 21

4th row 20 | 1

5th row 100 | 5

6th row 1000 | 50

7th row 350 | 17.5

constant is 20

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Please help me now ! Thank you
jarptica [38.1K]
First we'll do two basic steps. Step 1 is to subtract 18 from both sides. After that, divide both sides by 2 to get x^2 all by itself. Let's do those two steps now

2x^2+18 = 10
2x^2+18-18 = 10-18 <<--- step 1
2x^2 = -8
(2x^2)/2 = -8/2 <<--- step 2
x^2 = -4

At this point, it should be fairly clear there are no solutions. How can we tell? By remembering that x^2 is never negative as long as x is real. 

Using the rule that negative times negative is a positive value, it is impossible to square a real numbered value and get a negative result. 

For example
2^2 = 2*2 = 4
8^2 = 8*8 = 64
(-10)^2 = (-10)*(-10) = 100
(-14)^2 = (-14)*(-14) = 196

No matter what value we pick, the result is positive. The only exception is that 0^2 = 0 is neither positive nor negative.

So x^2 = -4 has no real solutions. Taking the square root of both sides leads to

x^2 = -4
sqrt(x^2) = sqrt(-4)
|x| = sqrt(4)*sqrt(-1)
|x| = 2*i
x = 2i or x = -2i
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Draw the number line like in the picture.

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√5 is about 2.236, meaning it's kind of close to 2.25.

√7 is about 2.646, meaning it's very close to 2.625.

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A triangle with three angles of the same measure would be best classifie as
galina1969 [7]
A. Equilateral because it says” same measure”
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