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3 years ago

Can u help me on this... I will mark u as brilliant students.. plz

Mathematics

1 answer:

Colt1911 [192]3 years ago

8 0

Answer:

For number 5 . a= 3 and b = -1

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2y - 2(5y) + 3× - 4 (78) = 11

Lera25 [3.4K]

y= -947/8

Just isolate the variables, even though this is a long, painstaking, agonizing process

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3 years ago

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I don’t know how to solve this

Lady_Fox [76]

Answer:

$\theta =2\pi k,\ \ k\in Z\ \\\text{or}\ \\\theta=-\dfrac{2\pi}{3}+2\pi k,\ \ k\in Z$

Step-by-step explanation:

Given:

$\cos \theta-\sqrt{3}\sin \theta=1$

Divide this equation by 2:

$\dfrac{1}{2}\cos \theta-\dfrac{\sqrt{3}}{2}\sin \theta=\dfrac{1}{2}$

Note that

$\cos \dfrac{\pi }{3}=\dfrac{1}{2}\\ \\\sin \dfrac{\pi }{3}=\dfrac{\sqrt{3}}{2}$

So, the previous equation is

$\cos \dfrac{\pi}{3}\cdot \cos \theta-\sin \dfrac{\pi}{3}\cdot \sin \theta=\dfrac{1}{2}$

Remind that

$\cos x\cos y-\sin x\sin y=\cos (x+y),$

then

$\cos \left(\dfrac{\pi}{3}+\theta\right)=\dfrac{1}{2}$

The solution of this equation is

$\dfrac{\pi}{3}+\theta=\pm \arccos \dfrac{1}{2}+2\pi k,\ \ k\in Z\\ \\\dfrac{\pi}{3}+\theta=\pm \dfrac{\pi}{3}+2\pi k,\ \ k\in Z\\ \\\theta =2\pi k,\ \ k\in Z\ \text{or}\ \theta=-\dfrac{2\pi}{3}+2\pi k,\ \ k\in Z$

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3 years ago

Cuanto es 50 gramos en kilos por fa

tatuchka [14]

0.05 kilogramos.................

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3 years ago

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Missing only a few days of school will not impact your grades.

Yuliya22 [10]

Answer:

the answer is false

Step-by-step explanation:

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3 years ago

Please I need help with this question asap.

kiruha [24]

Answer:

The table is:

x y

1 1

2 5

3 9

The graph B shows the relationship y=4x-3

Step-by-step explanation:

We need to fill the table using the rule:

To find y multiply x by 4 and then subtract 3.

Writing rule in mathematical form:

y=4x-3

Now for completing the table we need to put x=1,2 and 3 and find values of y

$For x=1//y=4x-3\\ y=4(1)-3\\ y=4-3\\ y=1\\$

$For \ x=2\\y=4x-3\\ y=4(2)-3\\ y=8-3\\ y=5$

$For \ x=3\\y=4x-3\\ y=4(3)-3\\ y=12-3\\ y=9$

So, the table is:

x y

1 1

2 5

3 9

The graph B shows the relationship y=4x-3

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3 years ago

Can u help me on this... I will mark u as brilliant students.. plz ​

Can u help me on this... I will mark u as brilliant students.. plz