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stealth61 [152]
3 years ago
14

Who knows how to do this please i need help I don’t understand

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
3 0

Answer:

9,4,0,1

Step-by-step explanation:

They give you different values for the X so all you have to do is plug in the X to the different equations

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If you take -7*300 is should equal  -2100
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∠A∠A and ​ ∠B∠B ​ are vertical angles with m∠A=xm∠A=x and m∠B=5x−80m∠B=5x−80 . What is m∠Am∠A ?
iris [78.8K]

The Vertical Angles Theorem states that if two angles are vertical angles, then they are congruent .Given <A and <B are vertical angles so they are equal.

<A=<B.

Measure of <A=x and <B=5x-80

Or  5x-80=x

Adding 80 both sides

5x-80+80=x+80

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Subtracting x both sides

5x-x=x-x+80

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Dividing both sides by 4

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3 years ago
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For what value of "a" will the product shown below have a purely imaginary value? (Show work please)
MakcuM [25]
If you expand out the brackets you get this,

(4+5i)(a+2i) = 4a + (5a)i + 8i - 10

The -10 comes from 5i * 2i.
Squaring i becomes -1.

Let's group the real stuff together,
and imaginary separately,

(4a - 10) + (5a + 8)i

For this to be purely imaginary,
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Use the following triangle to find Sec theta.
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Answer:

\frac{\sqrt{41}}{4}

Step-by-step explanation:

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In the diagram you provided the hypotenuse of the triangle is sqrt(41) and the opposite side is 5, using these two sides, we can solve for the adjacent side by using the Pythagorean Theorem: a^2+b^2=c^2

So this gives us the equation where a=adjacent side:

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Subtract 25 from both sides

a^2=16

Take the square root of both sides

a=4

So now plug this into the definition of sec(theta) and you get: \frac{\sqrt{41}}{4}. This is in most simplified form since 41, has no factors besides 41 and 1.

7 0
2 years ago
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