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Vilka [71]
3 years ago
6

Please answer 7 and 8, thank you guys for helping! <3

Mathematics
2 answers:
Ivenika [448]3 years ago
8 0
7. is D. -68 feet because the submarine is already at -28 ft, subtract another 40 ft and you get -68 ft
8. is A. -14 yards because they lost 6 yards (-6 yds) then lost another 8 yards (-8 tds) so subtract 8 from -6 to get -14 yards
elena-14-01-66 [18.8K]3 years ago
6 0
7: since they went down further you go further from zero: -28-40=-68 or D.
8: they lost 6 and then 8 so 6+8=14 but they lost them so -14 or A :)
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5 0
3 years ago
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Select the correct answer.
mariarad [96]

Answer:

B.

f(x) and g(x) are closed under subtraction because when subtracted, the result will be a polynomial.

Step-by-step explanation:

f(x)-g(x)\\=(a_0+a_1x+a_2x^2...+a_nx^n)-(b_0+b_1x+b_2x^2...b_mx^m)

Assume m>=n WOLOG

=(a_0-b_0)+(a_1x-b_1x)+(a_2x^2-b_2x^2)+...+(a_nx^n-b_nx^n)-b_{(n+1)}x^{n+1}-...-b_{m-1}x^{m-1}-b_mx^m

=(a_0-b_0)+(a_1-b_1)x+(a_2-b_2)x^2+...+(a_n-b_n)x^n-b_{(n+1)}x^{n+1}-...-b_{m-1}x^{m-1}-b_mx^m

Are also a polynomial in general, but maybe in a different degree

Closure under subtraction means, for all polynomials, under the operation of subtraction, it also belongs to polynomials

6 0
3 years ago
I need help from someone please?!
Andreyy89
3)
(x/3)+(2/5)
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4)
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3 years ago
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4 0
3 years ago
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If Professor Wilson found that the test scores of his students had a variance of 4.4, what is the standard deviation? Type a num
malfutka [58]

Answer:

The standard deviation will be: 2.1        

Step-by-step explanation:

We know that standard deviation is basically the square root of variance.

Using the formula to calculate the standard deviation

s=\sqrt{s^2}

As

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so the standard deviation can be calculated as:

standard deviation =\sqrt{s^2}

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Therefore, the standard deviation will be: 2.1                      

8 0
3 years ago
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