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3 years ago

How to solve 2x-3y-17 for y

Mathematics

1 answer:

uysha [10]3 years ago

4 0

Answer: y=-2/3x+-17/3

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Please help this is due in 20 mins, I will give brainliest

eduard

Answer:

L = 5 $\sqrt{10}$

Step-by-step explanation:

use Pythagorean Theorem:

L² + (5 $\sqrt{2}$ )² = (10 $\sqrt{3}$ )²

L² + 25(2) = 100(3)

L² + 50 = 300

L² = 250

L = $\sqrt{250}$ = $\sqrt{25}$ · $\sqrt{10}$ = 5 $\sqrt{10}$

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3 years ago

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How can u tell that 647 is less than 674?

Amiraneli [1.4K]

Look at the tenth's place. (:

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3 years ago

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Are the two figures similar? if so give the similarity ratio of the smaller figure to the larger figure.

Sophie [7]

Answer:

Not similar

Step-by-step explanation:

They are not similar because the ratio is not the same. 42/35 = 1.2 and 14/10=1.4

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2 years ago

Given that sectheta = -37/12 what is the value of cottheta for pi/2 < theta< pi?

lys-0071 [83]

Answer:

$cotg(\theta) = -\frac{12}{35}$

Step-by-step explanation:

The cotangent of theta is:

$cotg(\theta) = \frac{\cos{\theta}}{\sin{\theta}}$

For pi/2 < theta< pi

This means that the angle is in the second quadrant. In the second quadrant, the cosine is negative and the sine is positive. This means that the cotangent will be negative.

Secant:

$sec(\theta) = \frac{1}{\cos{\theta}}$

In this question

$sec(\theta) = -\frac{37}{12}$

$-\frac{37}{12} = \frac{1}{\cos{\theta}}$

Using cross multiplication

$-37\cos{\theta} = 12$

$37\cos{\theta} = -12$

$\cos{\theta} = -\frac{12}{37}$

Now we apply the following trigonometric identity:

$\sin{\theta}^{2} + \cos{\theta}^{2} = 1$

$\sin{\theta}^{2} + (-\frac{12}{37})^{2} = 1$

$\sin{\theta}^{2} = 1 - (-\frac{12}{37})^{2}$

$\sin{\theta}^{2} = 1 - \frac{144}{1369}$

$\sin{\theta}^{2} = \frac{1369 - 144}{1369}$

$\sin{\theta} = \pm \sqrt{\frac{1225}{1369}}$

Since the angle is in the second quadrant, the sine is positive.

$\sin{\theta} = \frac{35}{37}$

Finally, the cotangent:

$cotg(\theta) = \frac{\cos{\theta}}{\sin{\theta}}$

$cotg(\theta) = \frac{-\frac{12}{37}}{\frac{35}{37}}$

$cotg(\theta) = -\frac{12}{35}$

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3 years ago

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One hundred 50 cent coins have a mass of 690g. What is the mass of one 50 cent coin?

Nadya [2.5K]

You divide 690 by 100 which is 6.9
Therefore, one 50cent coin is 6.9g

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4 years ago

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