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3 years ago

Can someone tell me the answer to the ones with the question marks. Ill give a brainliest

Mathematics

2 answers:

Norma-Jean [14]3 years ago

8 0

Answer:

1. 41.9

2. 38.8

3. it cant be solved without knowing the green measurments.

Step-by-step explanation:

use the pythagorean theorem

1. add 81 to 1681 and then square root it.

2. find the square of 12 which is 144 then add it to 1369 and then square root it.

igomit [66]3 years ago

8 0

1. 41.9
2. 38.8
3. I do not know

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I need to replace the carpet for my bedroom floor and the supplier wants to

I am Lyosha [343]

Answer:

D. 120 square feet

Step-by-step explanation:

12×10=120

120 square feet

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3 years ago

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motikmotik

Answer:

9) x = 89°

10) x = 118°

11) x = 145°

12) x = 40°

Step-by-step explanation:

9) 180-91 = 89

10) x = 118° because it is alternate interior to 118

11) x-30 = 115, x = 145

12) 4x-15 = 145, 4x = 160, x = 40

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3 years ago

Divide 2.875x10^6by2.3x10^3

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Answer:

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Step-by-step explanation:

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3 years ago

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Find sin2x, cos2x, and tan2x if sinx=-15/17 and x terminates in quadrant III

vodka [1.7K]

Given:

$\sin x=-\dfrac{15}{17}$

x lies in the III quadrant.

To find:

The values of $\sin 2x, \cos 2x, \tan 2x$ .

Solution:

It is given that x lies in the III quadrant. It means only tan and cot are positive and others are negative.

We know that,

$\sin^2 x+\cos^2 x=1$

$(-\dfrac{15}{17})^2+\cos^2 x=1$

$\cos^2 x=1-\dfrac{225}{289}$

$\cos x=\pm\sqrt{\dfrac{289-225}{289}}$

x lies in the III quadrant. So,

$\cos x=-\sqrt{\dfrac{64}{289}}$

$\cos x=-\dfrac{8}{17}$

Now,

$\sin 2x=2\sin x\cos x$

$\sin 2x=2\times (-\dfrac{15}{17})\times (-\dfrac{8}{17})$

$\sin 2x=-\dfrac{240}{289}$

And,

$\cos 2x=1-2\sin^2x$

$\cos 2x=1-2(-\dfrac{15}{17})^2$

$\cos 2x=1-2(\dfrac{225}{289})$

$\cos 2x=\dfrac{289-450}{289}$

$\cos 2x=-\dfrac{161}{289}$

We know that,

$\tan 2x=\dfrac{\sin 2x}{\cos 2x}$

$\tan 2x=\dfrac{-\dfrac{240}{289}}{-\dfrac{161}{289}}$

$\tan 2x=\dfrac{240}{161}$

Therefore, the required values are $\sin 2x=-\dfrac{240}{289},\cos 2x=-\dfrac{161}{289},\tan 2x=\dfrac{240}{161}$ .

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3 years ago

Use the distributive property to rewrite the expression –5(3x – 2).

Kazeer [188]

The answer is -15x-10

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