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3 years ago

Multiply - 7a(a2- 9a+1)?

Mathematics

2 answers:

aleksklad [387]3 years ago

8 0

Answer:

-7a^3+63a^2-7a

Step-by-step explanation:

Licemer1 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

(−7a)(a2−9a+1)

=(−7a)(a2+−9a+1)

=(−7a)(a2)+(−7a)(−9a)+(−7a)(1)

=−7a3+63a2−7a

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Consider the circle of radius 5 centered at (0,0), how do you find an equation of the line tangent to the circle at the point (3

Flauer [41]

$\text{We know that the tangent at any point on a circle is perpendicular}\\
\text{to the radius at that point.}\\
\\
\text{so first we find the equation of the line joining (0,0) and (3,4)}\\
\text{and then using the slope, we find the line perperndicular to it at (3,4)}\\
\\
\text{the equation of the line passing through (0,0) and (3,4) is}\\
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y-0=\frac{4-0}{3-0}(x-0)$

$\Rightarrow y=\frac{4}{3}x\\
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\text{so the slope of radius is }m=\frac{4}{3}.\\
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\text{so the slope of the perpendicular line would be}=-\frac{1}{4/3}=-\frac{3}{4}\\
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\Rightarrow y-4=-\frac{3}{4}x+\frac{9}{4}\\
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\Rightarrow y=-\frac{3}{4}x+\frac{9}{4}+4\\
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kati45 [8]

Answer:

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Answer:

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Step-by-step explanation:

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Write an equation in Slope intercept form of the line that passes through the given points (-3,4) (1,4)

kvasek [131]

Answer:

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Step-by-step explanation

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3 years ago

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Hunter-Best [27]

Answer:

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Step-by-step explanation:

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