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3 years ago

Brainliest to correct answer help

Mathematics

2 answers:

shutvik [7]3 years ago

8 0

Answer:

Step-by-step explanation:

its c trust i am a man in my moms bacement

Vladimir [108]3 years ago

7 0

<h2>Answer:</h2>

[B] y = 1,000x has a proportional relationship with a constant of proportionality of 1,000.

"<u>An equation has a proportional relationship if it can be written in the form y = kx where k is the constant of proportionality</u>."

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What are the two ordered pairs for 5x=3

valkas [14]

Well the equation of this line is $x=3/5$ . Which means that for any value of y the x will always equal to 3/5, so the points (ordered pairs) for eg. are $(3/5,2),(3/5,\sqrt{7})$ .

Hope this helps.

3 0

3 years ago

The number of years from the start of the Great Depression to the first presidential election of Richard Nixon is six years less

sergij07 [2.7K]

Answer: Raul is 15

Step-by-step explanation:

Start of the great depression: 1929

The first presidential election of Richard Nixon: 1969

Difference: 40 years + 6 years= 46 years

46 years/3= 15.3

8 0

3 years ago

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8 divided by (7 - 3) x ( 4 + 6)<br> Equals?

gregori [183]

8÷(7-3)x(4+6)

8÷4x10

2x10

3 0

3 years ago

Rewrite with only sin x and cos x.

Annette [7]

Option A

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

<em><u>Solution:</u></em>

Given that we have to rewrite with only sin x and cos x

Given is cos 3x

$cos 3x = cos(x + 2x)$

We know that,

$\cos (a+b)=\cos a \cos b-\sin a \sin b$

Therefore,

$\cos (x+2 x)=\cos x \cos 2 x-\sin x \sin 2 x$ ---- eqn 1

We know that,

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

$\cos 2 x=\cos ^{2} x-\sin ^{2} x$

Substituting these values in eqn 1

$\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)$ -------- eqn 2

We know that,

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

Applying this in above eqn 2, we get

$\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)$

$\begin{aligned}&\cos (x+2 x)=\cos x-2 \sin ^{2} x \cos x-2 \sin ^{2} x \cos x\\\\&\cos (x+2 x)=\cos x-4 \sin ^{2} x \cos x\end{aligned}$

$\cos (x+2 x)=\cos x-4 \cos x \sin ^{2} x$

Therefore,

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

Option A is correct

7 0

3 years ago

Find 51* 49 USING MENTAL MATH'

Nesterboy [21]

I used mental math and it took a long time, but I got the answer of 2,499.

7 0

3 years ago

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