3 years ago

Which is the correct answer ? please help !

Mathematics

2 answers:

Sindrei [870]3 years ago

5 0

Answer: A

Step-by-step explanation: 2(−3k−5) = (2)(−3k+−5) = (2)(−3k)+(2)(−5) = −6k−10

Anni [7]3 years ago

4 0

I’ve been needing help with this also

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Which measurement is most accurate to describe the weight of an apple?

timofeeve [1]

120 g from different country

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If sin A = 3/8, find the value of cosec A - sec A.

alexira [117]

Answer:

$\csc A - \sec A = \dfrac 83 + \dfrac{8}{\sqrt{55}}\\\\\csc A - \sec A = \dfrac 83 - \dfrac{8}{\sqrt{55}}$

Step by step explanation:

$\text{Given that,}\\\\~~~~~~\sin A = \dfrac 38 \\\\\implies \sin^2 A = \dfrac 9{64}\\\\\implies 1 - \cos^2 A = \dfrac{9}{64}\\\\\implies \cos ^2 A = 1 - \dfrac 9{64}\\\\\implies \cos^2 A = \dfrac{55}{64}\\\\\implies \cos A =\pm\sqrt{\dfrac{55}{64}}\\ \\\implies \cos A = \pm\dfrac{\sqrt{55}}8\\\\$

$\implies \dfrac 1{\cos A} = \pm\dfrac{8}{\sqrt{55}}$

$\text{Now,}\\\\\csc A - \sec A\\\\=\dfrac{1}{\sin A}- \dfrac{1}{\cos A}\\\\=\dfrac 83 -\left(\pm \dfrac 8{\sqrt {55}} \right)\\ \\\text{Hence,}\\\\\csc A - \sec A = \dfrac 83 + \dfrac{8}{\sqrt{55}}\\\\\csc A - \sec A = \dfrac 83 - \dfrac{8}{\sqrt{55}}$

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2 years ago

3. 3.A) The angles of triangle ABC are in the ratio of 8:3:4. What is the measure of the smallest angle?

Vanyuwa [196]

Answer:

36 degrees.

Step-by-step explanation:

8+3+4=15

180/15=12

12x3=36 degrees.

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

720 pt in a hour converted to quarts in a min

Strike441 [17]

1 quart = 2 pints

720/2 = 360 quarts per hour

1 hour = 60 minutes

360/60 = 6 quarts per minute

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3 years ago