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3 years ago

What is the product (4x)( -3x^6)(-7x^3)

Mathematics

1 answer:

11111nata11111 [884]3 years ago

7 0

Answer:

84x^10

Step-by-step explanation:

The coefficients multiply, and the exponents add.

(4x)( -3x^6)(-7x^3) = (4)(-3)(-7)x^(1+6+3) = 84x^10

The rule for exponents is ...

(x^a)(x^b) = x^(a+b)

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Which expression represents the number 5i4+2i3+8i2+−4 rewritten in a+bi form?

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Remember
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Please help. I’m in a mastery test and keep getting the same one incorrect. This is my last chance.

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3 years ago

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8 ABC please trig assignment

Papessa [141]

Using equivalent angles, the solutions are given as follows:

a) $x = \frac{15\pi}{23}$ .

b) $x = \frac{9\pi}{62}, x = \frac{53\pi}{62}$ .

c) $x = \frac{3\pi}{8}, \frac{11\pi}{8}$

<h3>What are equivalent angles?</h3>

Each angle on the second, third and fourth quadrants will have an equivalent on the first quadrant.

For item a, we have to find the equivalent angle on the 2nd quadrant, where the sine is also positive.

Hence:

$\pi - \frac{8\pi}{23} = \frac{23\pi}{23} - \frac{8\pi}{23} = \frac{15\pi}{23}$

Hence $x = \frac{15\pi}{23}$ .

For item b, if two angles are complementary, the sine of one is the cosine of the other.

Complementary angles add to 90º = 0.5pi, hence:

$x + \frac{11\pi}{31} = \frac{\pi}{2}$

$x = \frac{31\pi}{62} - \frac{22\pi}{62}$

$x = \frac{9\pi}{62}$

The equivalent angle on the second quadrant is:

$\pi - \frac{9\pi}{62} = \frac{62\pi}{62} - \frac{9\pi}{62} = \frac{53\pi}{62}$

Hence the solutions are:

$x = \frac{9\pi}{62}, x = \frac{53\pi}{62}$

For item c, the angles are also complementary, hence:

$x + \frac{\pi}{8} = \frac{\pi}{2}$

$x = \frac{4\pi}{8} - \frac{\pi}{8}$

$x = \frac{3\pi}{8}$

The tangent is also positive on the third quadrant, hence the equivalent angle is:

$x = \pi + \frac{3\pi}{8} = \frac{8\pi}{8} + \frac{3\pi}{8} = \frac{11\pi}{8}$

Hence the solutions are:

$x = \frac{3\pi}{8}, \frac{11\pi}{8}$

More can be learned about equivalent angles at brainly.com/question/28163477

#SPJ1

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1 year ago