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3 years ago

Please help me! i have no idea how to do this.

Mathematics

1 answer:

Sauron [17]3 years ago

4 0

20:30 so it becomes 2:3 as a fraction it would be 2/3. a fraction is basically a ratio.

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7. By selling a bicycle for * 2,850, a shopkeeper gains 14%. If the profit is reduced to 8%, then the selling price

sweet [91]

<h2>Correct option :</h2><h3> $= \color{plum}\bold{(b) \: 2,700}$ </h3><h2>Steps to derive answer :</h2>

Selling price of a bicycle = 2850

Profit percentage = 14%

We know that :

$\color{plum}\tt{Cost \: \: price = \frac{Selling \: \: price \: \times \: 100}{100 \: \: + \: \: profit \: \%} }$

Then, the cost price of this bicycle :

$= \tt \frac{2850 \times 100}{100 + 14}$

$= \tt \frac{285000}{114}$

$=\color{plum} \tt2500$

Thus, the cost price of this bicycle = 2500

In another scenario :

Profit percentage = 8%

Cost price of the bicycle = 2500

Then, Selling price will be equal to :

Let x be the selling price of the bicycle.

$= \tt2500 = \frac{\: x \: \times 100}{100 + 8}$

$= \tt2500 = \frac{100x}{108}$

$=\tt 100x = 2500 \times 108$

$= \tt100x = 270000$

$=\tt x = \frac{270000}{100}$

$=\color{plum}\tt x = 2700$

Therefore, the selling price with a profit of 8% will be = 2700

6 0

2 years ago

SOMEONE HELP ME PLEASE AND STOP PUTTING THOES LINKS PLEASE<br> THIS IS A TEst

nadezda [96]

Answer:

-12n + 42 -15n -27

-27n + 15

Step-by-step explanation:

C is your answer.

8 0

3 years ago

Why is the opposite of a number also called the additive inverse

lana66690 [7]

<span>This </span>number<span> is </span>also<span> known as the </span>opposite<span> (</span>number<span>), sign change, and negation. For a real </span>number<span>, it reverses its sign: the </span>opposite<span> to a positive </span>number<span> is negative, and the </span>opposite<span> to a negative </span>number<span> is positive. Zero is the </span>additive inverse<span> of itself.</span>

7 0

3 years ago

90 POINTS PLEASE HELP

11111nata11111 [884]

$sin\alpha = - 0.8$

<u>Step-by-step explanation:</u>

We have , $cos\alpha = \frac{3}{5}$ , where $\alpha$ is located in IV quadrant! Let's find out value of $sin\alpha$ :

$sin\alpha = \sqrt{1-(cos\alpha )^2$

⇒ $sin\alpha = \sqrt{1-(cos\alpha )^2$

⇒ $sin\alpha = \sqrt{1-(\frac{3}{5} )^2$

⇒ $sin\alpha = \sqrt{1-(\frac{9}{25} )$

⇒ $sin\alpha = \sqrt{(\frac{25-9}{25} )$

⇒ $sin\alpha = \sqrt{(\frac{16}{25} )$

⇒ $sin\alpha = \pm {(\frac{4}{5} )$

Value of $sin\alpha$ is dependent on which quadrant it is . Since, in question it's given that $\alpha$ is located in IV quadrant , So $sin\alpha$ is negative i.e.

⇒ $sin\alpha = - {(\frac{4}{5} )$

⇒ $sin\alpha = - 0.8$

Therefore, $sin\alpha = - 0.8$ .

4 0

3 years ago

Read 2 more answers

Solve The Triangle (See Picture!!)

joja [24]

Answer:

Step-by-step explanation:

use sin formula

$\frac{a}{sin \alpha } =\frac{b}{sin \beta } =\frac{c}{sin \gamma} \\\frac{10}{sin~40} =\frac{12}{sin ~\beta } \\sin~\beta =\frac{12}{10} \times sin~40\\ \beta=sin^{-1}(1.2 sin ~40)\approx 50.5 ^\circ\\\gamma=180-(40+50.5)=89.5^\circ\\\frac{c}{sin~89.5}=\frac{10}{sin~40} \\c=\frac{sin~89.5}{sin ~40} \times 10 \approx 15.6\\D$

4 0

3 years ago