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777dan777 [17]
3 years ago
8

(x+2)(x2 - 2x+4)expand and simplify​

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
5 0

Answer:

Step-by-step explanation:

2x2 is 4

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Find the measure of angle A.<br> Can someone help
Zarrin [17]

80+x+45+2x+55=180

3x+100+80=180

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X=0

Measure of angle a=45

8 0
3 years ago
12g+6=78 thats what i need help with
Mrrafil [7]
I assume you need to solve for g?
12g + 6 = 78
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12g = 72
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I hope this helps! Let me know if you want me to explain anything :)
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When does the​ t-distribution approach the standard normal​ distribution? Choose the correct answer below. A. When the standard
const2013 [10]

Answer:

E. When the sample size​ increases, because the standard deviation of the distribution of sample means better estimates the population standard deviation for larger sample sizes.

Step-by-step explanation:

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The longer leg of a right triangle is 6cm longer than the shorter leg and also 1cm longer than the hyptenese. find the perimeter
CaHeK987 [17]
X - a leg  (x > 6);
x - 6 - a leg;
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Use the Pythagorean theorem
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Use:(a\pm b)^2=a^2\pm2ab+b^2

x^2+2x+1=x^2+x^2-12x+36\ \ \ |-x^2-2x-1\\\\x^2-14x+35=0\ \ \ |-35\\\\x^2-14x=-35\\\\x^2-2\cdot x\cdot7=-35\ \ \ |+7^2\\\\x^2-2\cdot x\cdot7+7^2=-35+7^2\\\\(x-7)^2=14\iff x-7=\pm\sqrt{14}\ \ \ |+7\\\\x=7-\sqrt{14} < 6;\ x=7+\sqrt{14}

x=7+\sqrt{14}\\x-6=1+\sqrt{14}\\x+1=8+\sqrt{14}

The perimeter:

7+\sqrt{14}+1+\sqrt{14}+8+\sqrt{14}=16+3\sqrt{14}
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Ella is 13 years, four months, and 19 days old. 
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4 years ago
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