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irinina [24]
3 years ago
10

I really need help bad!!

Mathematics
1 answer:
const2013 [10]3 years ago
3 0

Answer:

  5.  x = 17

  7.  x = 2

Step-by-step explanation:

The applicable relation is, "the product of the near distance to the circle and the far distance to the circle is the same for each secant." Distance is measured from the point where the secants intersect.

__

<h3>5.</h3>

Using the rule, we have ...

  7(7+x) = 8(8+13)

  7+x = 24 . . . . . . . . . divide by 7

  x = 17 . . . . . . . . . . subtract 7

__

<h3>7.</h3>

The same rule applies.

  7(7 +6x -1) = 9(9 +x +3)

  42x +42 = 9x +108 . . . . . . simplify

  33x = 66 . . . . . . . . . . . . . subtract 9x+42

  x = 2 . . . . . . . . . . . . . . divide by 33

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Answer:

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Step-by-step explanation:

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Simplify the following expression. (10-4i)(4-5i)+(-15+20i)
Vikki [24]

Answer:

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Step-by-step explanation:

1. Multiply (10-4i) and (4-5i), I recomnd using foil:

40-50i-16+20i^2 + (-15+20i)

2. Remove the parenthesis around -15+20i

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3. Simplify i^2

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40-50i-16+20(-1) + (-15)+20

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40-50i-16-20 + (-15)+20

6. Combine like terms:

-5-50i-16i+20i

5-46i

And the problem is done

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