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Molodets [167]
2 years ago
10

Tell me whether the lines are parallel, perpendicular, or neither. If the lines intersect, name the point of intersection.

Mathematics
1 answer:
nata0808 [166]2 years ago
6 0

Answer:

(Neither they aren't parallel because they intersect and they aren't perpendicular because while they intersect they don't make a 90 degree angle and the point of intersection is (1.5,0) and (0,2) since it intersects at 2 places.) -Raymond :3

Step-by-step explanation:

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Find a1, for the arithmetic series<br> with S14 = - 420 and d = -6.
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\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{term position}\\ a_1=\textit{first term}\\ d=\textit{common difference}\\ \cline{1-1} n = 14\\ d= -6 \end{cases} \\\\\\ a_{14}=a_1+(14-1)(-6)\implies a_{14}=a_1+(13)(-6)\implies a_{14}=a_1-78 \\\\[-0.35em] ~\dotfill

\bf \textit{sum of a finite arithmetic sequence} \\\\ S_n=\cfrac{n(a_1+a_n)}{2}\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{last term's}\\ \qquad position\\ a_1=\textit{first term}\\ \cline{1-1} n= 14\\ S_{14}=-420\\ a_{14}=a_1-78 \end{cases}\implies S_{14}=\cfrac{n(a_1+a_{14})}{2} \\\\\\ -420=\cfrac{14[a_1+(a_1-78)]}{2}\implies -420=7(2a_1-78)\implies \cfrac{-420}{7}=2a_1-78 \\\\\\ -60=2a_1-78\implies 18=2a_1\implies \cfrac{18}{2}=a_1\implies 9=a_1

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3 years ago
A(n) a0 is a complex community of organisms that function as a unit in an environment.
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I'm fairly sure that the answer is an ecosystom.
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What is the value of 4p -2 , when p=8 ?
Katen [24]

Answer:

30

Step-by-step explanation:

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Hope it helps! :)

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Answer:

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Step-by-step explanation:

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2 years ago
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