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3 years ago

Help me please it's a quiz

Mathematics

1 answer:

lesya692 [45]3 years ago

7 0

Answer:

8000in³

Step-by-step explanation:

20³=20*20*20=8000

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Kaylen earned $14.87 selling cookies and $7.76 selling

____ [38]

Answer: $12.63

Step-by-step explanation:

$14.87 + $7.76 = $22.63

2pizzas x $5 = $10

$22.63 - $10 = $12.63

3 0

2 years ago

Use demoivre's theorem to show that;<br>cos4¤ =8 cos4¤ -8cos2¤+1

ss7ja [257]

Answer:

$\cos4( \theta)=Re(\cos4( \theta)+i\sin4( \theta)) \\=Re(\cos ( \theta)+i\sin ( \theta))^4 \\ =Re(cos^4( \theta)+4cos^3( \theta)isin( \theta)+6cos^2( \theta)i^2sin^2( \theta)+4cosi^3( \theta)sin^3( \theta)+i^4sin^4( \theta)) \\cos( 4\theta) =cos^4( \theta)-6cos^2( \theta)sin^2( \theta)+sin^4( \theta) \\ =(1-\sin^2( \theta))^2-6(1-\sin^2( \theta))\sin^2( \theta)+sin^4( \theta) \\ = 1-2\sin^2( \theta)+\sin^4( \theta)-6\sin^2( \theta)+6\sin^4( \theta)+\sin^4( \theta) \\ =8\sin^4( \theta)-8\sin^2( \theta)+1$

7 0

3 years ago

Please help!

olasank [31]

8x + 84 = 500
8x = 416
x = 52

So if he wants to earn more than 500 dollars, he needs to make more than 52 dollars a week.

3 0

3 years ago

Read 2 more answers

Please answer correctly math problemo

MrMuchimi

Answer:

Step-by-step explanation:

We have to substitute x with 2 and y with 4

when the sign of a operation is not expressed it means that the operation is a

multiplication

So we have

3*2 + 2*(4)^2

6 + 2*(16)

6 + 32

4 0

3 years ago

HELLP THIS IS FOR FORMULAS AND IDK WHAT TO DOOO

4vir4ik [10]

Answer:

G=125 X + 50

Step-by-step explanation:

Bob charges 125 pieces for each magical brooms . And 50 as one time charge .

We have to find the formula for the number of gold pieces G as a function of X.

Let X be the number of brooms he constructed

The charge for a broom stick is 125 . So the number of gold pieces he received when X brooms are constructed is 125 X

There will be 50 Gold pieces as one time charge

so the total number of gold pieces will be 125 X + 50

therefore G=125 X +50

3 0

4 years ago