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4 years ago

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

1 answer:

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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Mars2501 [29]

$(sin x - cos x)^{2} = 1 - 2 sin x cos x$

Step-by-step explanation:

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

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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.

(-3 +4i)(-3 -4i) = 25 +0i

_____

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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3 years ago