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3 years ago

Need help with this math problem

Mathematics

2 answers:

azamat3 years ago

8 0

Answer: 12in

Step-by-step explanation:

Length+width+length+width

guajiro [1.7K]3 years ago

7 0

Answer:

<h3> first you 4x2 </h3><h3>and then you get the answer which is 8. </h3>

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3 years ago

What 2 numbers multiply to get -120 and add to get -14

mr Goodwill [35]

Answer:

-20 and 6

Step-by-step explanation:

-20 x 6 = -120

and if you add -20 and 6, you get -14.

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3 years ago

Is the point (2, 2 1/2) on the graph of y=x+2? How do you know?

Ksenya-84 [330]

Answer:

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Step-by-step explanation:

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3 years ago

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natali 33 [55]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Find all complex numbers $z$ such that $z^4 = -4.$

patriot [66]

Converting -4 to polar form gives $-4=4\exp(i\pi)$ .

Then the 4th roots of -4 would be the numbers

$4^{1/4}\exp\left(i\dfrac{\pi+2k\pi}4\right)$

where <em>k</em> is taken from {0, 1, 2, 3}.

So we have

$z_1=4^{1/4}\exp\left(\dfrac{i\pi}4\right)=\sqrt2\left(\cos\dfrac\pi4+i\sin\dfrac\pi4\right)=1+i$

$z_2=\sqrt2\left(\cos\dfrac{3\pi}4+i\sin\dfrac{3\pi}4\right)=-1+i$

$z_3=\sqrt2\left(\cos\dfrac{5\pi}4+i\sin\dfrac{5\pi}4\right)=-1-i$

$z_4=\sqrt2\left(\cos\dfrac{7\pi}4+i\sin\dfrac{7\pi}4\right)=1-i$

4 0

3 years ago

Need help with this math problem ​

Need help with this math problem