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zalisa [80]
3 years ago
15

What is (m−3+4n)⋅(−8)

Mathematics
2 answers:
antoniya [11.8K]3 years ago
8 0

Answer:

-8m+24-32n

Step-by-step explanation:

To expand this, we have to multiply -8 into m, -3, and 4n. Expanding, we get

(-8)(m)+(-8)(-3)+(-8)(4n)

This simplifies to

-8m+24-32n, which is our answer.

Volgvan3 years ago
7 0

Just use the distributive property

-8 * m = -8m

-8 * -3 = 24

-8 * 4n = -32n

-8m + 24 -32n

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3 years ago
Find the midpoint given the endpoints (4,-10) (22,-4) Please do not use space when
Elza [17]

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Step-by-step explanation:

By using the formula (x_{m},y_{m})  =(\frac{x_{1}+x_{2}  }{2},\frac{y_{1}+y_{2}  }{2} )

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For finding the midpoint X variable do:

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For finding the midpoint Y variable do:

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x: 13

y: -7

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6 0
3 years ago
Given that the quadratic equation has equal roots (k^2-1)x^2-2kx-3k-1=0
Alik [6]

Answer:

(See explanation for further details)

Step-by-step explanation:

The real expression is:

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x = \frac{2\cdot k \pm \sqrt{4\cdot k^{2}-4\cdot (k^{2}-1)\cdot (-3\cdot k + 1)}}{k^{2}-1}

This condition must be observed for the case of a quadratic equation with equal roots:

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7 0
4 years ago
Prove the identity sin4x=2sin2xcos2x
Musya8 [376]
There is a trig identity called the sum of 2 angles for sin its<span>
sin(a+b)=sin(a)cos(b)+cos(a)(sin(b)
</span>
You will need to use it. So in your question split the 4x in 2 equal parts 2x and 2x
 <span>
</span><span>sin(4x)=sin(2x+2x)

</span>Now using the expansion above you will get

<span>sin(2x+2x)=sin(2x)×cos(2x)+cos(2x)×sin(2x)

</span>And it will simplify to 

<span><span>2sin(2x)cos(2x)

I hope this helps you! Good luck :)</span></span>
5 0
3 years ago
Read 2 more answers
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