Which expressions are equivalent to the expression 4a – 6b + 3c?

Mathematics

1 answer:

marshall27 [118]3 years ago

7 0

2(2a-3b)+3c = 4a-6b+3c

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Solve for x C. 120 2x 3x D. (2x+6) X 126

brilliants [131]

Answer:

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Step-by-step explanation:

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2 years ago

I need help with the steps. The answer is (5,2)

Elden [556K]

So with this, I will be using the substitution method. With the first equation, substitute (y+3) into the x variable and solve for y:

$y+3+y=7\\2y+3=7\\2y=4\\y=2$

Next, now that we have the value of y, substitute it into either equation to solve for x:

$x+2=7\\x=5\\\\x=2+3\\x=5$

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MAXImum [283]

Answer:

$x\geq -2$

Step-by-step explanation:

well the values for x are from -2 to ∞

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3 years ago

Complete the identity. sin4x - cos4x = ?

Katyanochek1 [597]

Since sin(2x)=2sinxcosx, we can plug that in to get sin(4x)=2sin(2x)cos(2x)=2*2sinxcosxcos(2x)=4sinxcosxcos(2x). Since cos(2x) = cos^2x-sin^2x, we plug that in. In addition, cos4x=cos^2(2x)-sin^2(2x). Next, since cos^2x=(1+cos(2x))/2 and sin^2x= (1-cos(2x))/2, we plug those in to end up with 4sinxcosxcos(2x)-((1+cos(2x))/2-(1-cos(2x))/2)
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4 0

3 years ago

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