5x−y=6 −2x+y=8 combining equations

Mathematics

2 answers:

lapo4ka [179]2 years ago

8 0

Answer:

x=9 y=2

Step-by-step explanation

adoni [48]2 years ago

5 0

Answer:

Step-by-step explanation:

5x-y=6

2x+y=8

add them up

7x=14

divide by 7 to get x

x=2

fit it into both equation

y=4

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klio [65]

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3 years ago

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3 years ago

The circle below is center Ed at O. Decide which length,if any, is definitely the same as the length. a) AD. b) BC. Justify your

Mars2501 [29]

Answer:

Point O is the center of the circle.

$\overline{A\:\!F}$ is a chord.

$\overline{OD}$ is a segment of the radius and is perpendicular to $\overline{A\:\!F}$

If a radius is perpendicular to a chord, it bisects the chord (divides the chord into two equal parts).

Therefore, $\overline{AD}=\overline{DF}$

If $\overline{BE}$ was extended past point E to touch the circumference it would be a chord.

As $\overline{OC}$ is perpendicular to $\overline{BE}$ , it would bisect the chord, but as $\overline{BE}$ is only a portion of a chord, $\overline{OC}$ <u>does not</u> bisect $\overline{BE}$ .