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fiasKO [112]
3 years ago
10

One angle of an isosceles triangle is 80º. What are the other two angles?

Mathematics
1 answer:
eimsori [14]3 years ago
4 0

Answer:

80 and 20

Step-by-step explanation:

80+80+20=180

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Determine the standard form of the equation of the line that passes through ( -5,0 ) ( 0 ,-9)
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The general form for a line through two points (a,b) and (c,d) is

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This is better than the slope forms because it works in the no slope case, as does the standard form.

If you haven't seen it before, it works because when (x,y)=(a,b) we get (c-a)(b-b)=(d-b)(a-a), both sides zero, and when (x,y)=(c,d) we get (c-a)(d-b)=(d-b)(c-a), clearly equal sides.

Here we have

(0 - -5)(y - 0) = (-9 - 0)(x - - 5)

5y = -9(x+5)

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Ironically there are two standards for standard form; one with the constant alone on the right and one with the whole thing equal to zero.  I like the constant alone.

Answer: 9x + 5y = -45

Check:

We check each point is on the line

(-5,0)

9(-5) + 5(0) = -45, good

(0, -9)

9(0) + 5(-9) = -45, good again


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<span>( 5, 2) and ( 6, 4)
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equation
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answer
</span><span>a. y = 2x - 8</span>
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Please can someone find X! Please!
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