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2 years ago

15

In the XY coordinate plane, the slope of a line is 4 and it passes through the point (1,3). Find the equation of a line that is

perpendicular to the given line and intersects it at the given point.
A. y=4x-1
B. y=-4x+7
C. y=1/4x -1
D. y=4x+13/4
E. y=-1/4x+13/4

1 answer:

Sergeeva-Olga [200]2 years ago

7 0

Answer:

E?

Step-by-step explanation:

I'm sorry of this answer is wrong

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$k=\pm3$

Step-by-step explanation:

[...] if you can write the LHS as a perfect square, or if you can't spot a factorization of it right away, if and only if the discriminant $\Delta = b^2-4ac$ (or, if b is an even number, 1/4 of it) is zero.

<u>I see it! I see it!</u>

Stare at it for a while. First term is $3(2x)^2$ , third term is $3(1)^2$ , we are missing a double product, but we can play with k. For the LHS to be $3(2x\pm1)^2 = 3(4x^2\pm4x+1) = 12x^2\pm12x+3$ you just need $4k= \pm12 \rightarrow k=\pm3$ .

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Answer:

The volume of the cone in terms of π is 90.31π inches³ to the nearest hundredth.

Step-by-step explanation:

Volume = πr²(h/3) = ?

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Now that we have both Height (15 inches) and Radius (4.25 inches), calculate the volume.

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