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nikdorinn [45]
3 years ago
7

Lines AB and CD are straight lines. Find x and y. Give reasons to justify your solutions.

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
5 0

9514 1404 393

Answer:

  x = 14°

  y = 5°

Step-by-step explanation:

Angle COL is complementary to both 25° (∠AOC) and 5y (∠LOM). Then it must be true that ...

  5y = 25°

  y = 5° . . . . . . divide by 5

__

Similarly, angle MOB is complementary to angle LOM, so ...

  90° -25° = 3x +23°

  42° = 3x . . . . . subtract 23° and simplify

  14° = x . . . . . .  divide by 3

The values of x and y are ...

  • x = 14°
  • y = 5°
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Answer:

  • <u>The rate of return is 8.15%</u>
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<u></u>

Explanation:

For the first question, you need to find the rate that makes the present value of a stream of ten constant annual payments of $15,000 equal to the $100,000 investment.

The formula that returns the present value of a constant payment is called the annuity formula and is:

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In your problem you know:

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  • payment: $15,000
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Try 5%:

       \$15,000\times \bigg[\dfrac{1}{0.05}-\dfrac{1}{0.05(1+0.05)^{10}}\bigg]=\$115,826

Then, the rate of return is greater than 5%. After several trials you will find that the rate of return is 8.15%.

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3 years ago
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larisa [96]

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The outside factor multiplies each term in parentheses.

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