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Ksivusya [100]
4 years ago
5

Please hurry! What is the value of 3|–2x + y| when x = 6 and y = –4?a. –48b. –24c. 24d. 48

Mathematics
1 answer:
sdas [7]4 years ago
4 0
First, let’s plug in our x and y values.
3|-2(6) - 4|
simplify the inside of the absolute value brackets
3|-12 - 4|
3|-16|
Since the absolute value of -16 is 16, the equation looks like this:
3(16)
48.
The answer is D. 48
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(sin x - cos x)^{2}  = 1 - 2 sin x cos x

Step-by-step explanation:

Step 1 : Taking L.H.S(Left Hand Side) we have,

(sin x - cos x)^{2}  = sin^{2} x + cos^{2} x - 2 sin x cos x                       ... equation (1)    

Step 2 : As we know, sin^{2} x + cos^{2} x = 1

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5 0
3 years ago
What is the answer to this? i can’t figure it out.
Svetach [21]

9514 1404 393

Answer:

  25 +0i

Step-by-step explanation:

The conjugate of a complex number is that number with the sign of the imaginary part reversed.

For z = -3+4i, its conjugate z* is -3-4i. The product of z and z* is ...

  (-3 +4i)(-3 -4i) = -3(-3 -4i) +4i(-3 -4i)

  = 9 +12i -12i -16i² = 9 +16 = 25

The real part of the product is 25; the imaginary part is 0.

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_____

You may have noticed that (z)(z*) = |z|², the sum of the squares of the real and imaginary parts. It is always a non-negative real number.

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