3 years ago

Find the Slope without graphing (-4,3) (5,6)

1 answer:

6 0

Use the equation y2-y1/x2-x1

This gets you the equation
6-3/5-(-4) which equals 3/9

Simplify it to get the actual slope

So the slope is 1/3x

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What is 23/46 reduced

artcher [175]

If you were trying to simplify it, it's not posible because 23 is a composite number so I just went ahead and did division for you:
23/46=0.5
I hope this helped!

4 0

3 years ago

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Solve the following system of equations algebraically:

d1i1m1o1n [39]

Answer:

(2,1) , (-4,-17)

x = 2 , y = 1

x = − 4 , y = − 17

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3 years ago

Which of the following best describes the expression 7x + 2y?

stira [4]

Answer:6

Step-by-step explanation:2+4

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2 years ago

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Show that cos(3x) = cos3(x) − 3 sin2(x)cos(x). (Hint: Use cos(2x) = cos2(x) − sin2(x) and the cosine sum

otez555 [7]

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

To prove:

$\cos 3x=\cos^3x-3\sin^2 x\cos x$

Identities used:

$\cos(A+B)=\cos A\cos B+\sin A\sin B$ ......(1)

$\sin 2A=2\sin A\cos A$ ........(2)

$\cos 2A=\cos^2A-\sin^2 A$ .......(3)

Taking the LHS:

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

Using identity 1:

$\Rightarrow \cos (x+2x)=\cos x\cos 2x-\sin x\sin 2x$

Using identities 2 and 3:

$\Rightarrow \cos x(\cos ^2x-\sin^2 x)-\sin x(2\sin x\cos x)\\\\\Rightarrow \cos^3x-\sin^2x\cos x-2\sin^2 x\cos x\\\\\Rightarrow \cos^3x-3\sin^2x\cos x$

As, LHS = RHS

Hence proved

4 0

3 years ago

Can somebody please help me with this? I’ll give you a Brainly:)

wolverine [178]

Answer:

I think 90 degrees hope it helps

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3 years ago