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Nookie1986 [14]
3 years ago
13

Order of operations : 6+5-3x2+1-4:2=

Mathematics
2 answers:
Alexeev081 [22]3 years ago
8 0
3x2 is first then finish the equation like normal from the beginning to end!
Basile [38]3 years ago
8 0
You use
Parentheses
Exponent
Multiplication
Division
Addition
Subtraction
So you’ll read from left to right whatever come first and go down the list of PEMDAS
So the first thing you’ll do is 3x2 which is 6
So you should have 6+5-6+1-4/2 then do 4/2 which is 2 so you’ll have 6+5-6+1-2 next is addition so 6+5 is 11 now bring down the equation it’s 11-6+1-2 next do 11-6 it’s 5 so then it’ll be 5+1-2. 5+1 is 6 finally do 6-2 and that’s 4 so 4 is ur final answer

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Rewrite each expression by completing the square.
Lyrx [107]

Answer:

1) x^2 -4x +(\frac{4}{2})^2 -\frac{5}{2} - (\frac{4}{2})^2

(x-2)^2 -\frac{5}{2} -4=(x-2)^2 -\frac{13}{2}

2) x^2 -3x +(\frac{3}{2})^2 +\frac{1}{2} - (\frac{3}{2})^2

(x-\frac{3}{2})^2 +\frac{1}{2} -\frac{9}{4}=(x-\frac{3}{2})^2 -\frac{7}{4}

3) x^2 +\frac{9}{2}x +(\frac{9}{4})^2 -\frac{15}{4} - (\frac{9}{4})^2

(x+\frac{9}{4})^2 -\frac{15}{4} -\frac{81}{16}=(x+\frac{9}{4})^2 -\frac{141}{16}

4) c^2 -\frac{5}{4}c +(\frac{5}{8})^2 -\frac{139}{200} - (\frac{5}{8})^2

(c-\frac{5}{8})^2 -\frac{139}{200} -\frac{25}{64}=(c-\frac{5}{8})^2 -\frac{1737}{1600}

5) n^2 +\frac{1}{4}n +(\frac{1}{8})^2 +\frac{5}{8} - (\frac{1}{8})^2

(n+\frac{1}{8})^2 +\frac{5}{8} -\frac{1}{64}=(n+\frac{1}{8})^2 +\frac{39}{64}

Step-by-step explanation:

1. −2x^2 + 8x + 5

For this case we can begin dividing all the terms by -2 and we got:

x^2 -4x -\frac{5}{2}[/texAnd if we complete the square we got:[tex] x^2 -4x +(\frac{4}{2})^2 -\frac{5}{2} - (\frac{4}{2})^2

(x-2)^2 -\frac{5}{2} -4=(x-2)^2 -\frac{13}{2}

2. 2.5x^2 − 7.5x + 1.25

For this case we can begin dividing all the terms by 2.5 and we got:

x^2 -3x + \frac{1}{2}

And if we complete the square we got:

x^2 -3x +(\frac{3}{2})^2 +\frac{1}{2} - (\frac{3}{2})^2

(x-\frac{3}{2})^2 +\frac{1}{2} -\frac{9}{4}=(x-\frac{3}{2})^2 -\frac{7}{4}

3. 4 / 3x ^2 + 6x − 5

For this case we can begin dividing all the terms by 4/3 and we got:

x^2 + \frac{9}{2}x - \frac{15}{4}

And if we complete the square we got:

x^2 +\frac{9}{2}x +(\frac{9}{4})^2 -\frac{15}{4} - (\frac{9}{4})^2

(x+\frac{9}{4})^2 -\frac{15}{4} -\frac{81}{16}=(x+\frac{9}{4})^2 -\frac{141}{16}

4. 1000c^2 − 1250c + 695

For this case we can begin dividing all the terms by 1000 and we got:

c^2 - \frac{5}{4}c + \frac{139}{200}

And if we complete the square we got:

c^2 -\frac{5}{4}c +(\frac{5}{8})^2 +\frac{139}{200} - (\frac{5}{8})^2

(c-\frac{5}{8})^2 -\frac{139}{200} -\frac{25}{64}=(c-\frac{5}{8})^2 -\frac{487}{1600}

5. 8n^2 + 2n + 5

For this case we can begin dividing all the terms by 8 and we got:

n^2 + \frac{1}{4}x + \frac{5}{8}

And if we complete the square we got:

n^2 +\frac{1}{4}n +(\frac{1}{8})^2 +\frac{5}{8} - (\frac{1}{8})^2

(n+\frac{1}{8})^2 +\frac{5}{8} -\frac{1}{64}=(n+\frac{1}{8})^2 +\frac{39}{64}

3 0
3 years ago
What are the solutions to x2 - 2x -8=0?
pav-90 [236]
The answer is 2
Add like terms
Add 8 to -8 and the zero
To get 4x=8
Then divide 4 and 8 by 4
To get x=2
4 0
4 years ago
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algol13

Step-by-step explanation:

m1.m2= -1

(4y = -2x -9)= (y = -1x/2 -9/4)

-1/2.m2= -1

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formula = y - y1 = m2 ( x - x1)

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svp [43]
You can use spearman’s rank correlation coefficient but not sure if that’s the answer your looking for because it looks like you haven’t gave the whole question
8 0
3 years ago
How do I verify this?
Mashcka [7]

Answer:

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sec²-2scθ+tanθ+tan²θ

= 1+sin²θ-2sinθ/cos²θ

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=1-sinθ/sinθ+1

1-sinθ/sinθ+1=-1+sinθ/1+sinθ True

6 0
3 years ago
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