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4vir4ik [10]
4 years ago
11

Solve the following system of equations algerbraically 3x+2y=4 4x+3y=7

Mathematics
1 answer:
liberstina [14]4 years ago
5 0

Answer:

point form:

( -2, 5)

equation:

x = -2

y = 5

Step-by-step explanation:

i'm gonna solve by addition/ elimination

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If sin tetha=root3/2, what is cos tetha?​
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Answer:

The value of cos Ф is ± \frac{1}{2}

Step-by-step explanation:

There are important rules for sin Ф and cos Ф

  • sin²Ф + cos²Ф = 1
  • sin²Ф = 1 - cos²Ф
  • cos²Ф = 1 - sin²Ф

∵ sin Ф = \frac{\sqrt{3}}{2}

∴ sin²Ф = (\frac{\sqrt{3}}{2})^{2}

∴ sin²Ф = \frac{3}{4}

→ By using the third rule above

∵ cos²Ф = 1 - sin²Ф

∴ cos²Ф = 1 - \frac{3}{4}

∴ cos²Ф = \frac{1}{4}

→ Take square root for both sides

∴ cos Ф = ± \frac{1}{2}

∴ The value of cos Ф is ± \frac{1}{2}

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Step-by-step explanation:

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James says that since -5 is farther from zero on a number line than -4 is, then -5 > -4. Use complete sentences to explain th
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