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3 years ago

PLEASE PLEASE PLEASE HELP I WILL GIVE BRAINALIST AND EXTRA POINTS FIRST PERSON

Mathematics

1 answer:

Sladkaya [172]3 years ago

5 0

Answer:

$66.14

Step-by-step explanation:

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What type of lines are shown on the graph on the right? Explain your answer.

Trava [24]

Answer: Parallel lines

Step-by-step explanation:

These lines are Parallel due to the fact that they will never cross each other. Since they are both perfectly lined up with each other, this makes them Parallel.

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3 years ago

Which data set COULD NOT be represented by the histogram shown?

igomit [66]

D. Only has 3 numbers in the 5-9 range, while the histogram shows 4. Hope this helps :)

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3 years ago

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Convert the Cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation.

SashulF [63]

ANSWER

${r}^{2} = 4 \cos2\theta$

EXPLANATION

The Cartesian equation is

${( {x}^{2} + {y}^{2} )}^{2} = 4( {x}^{2} - {y}^{2} )$

We substitute

$x = r \cos( \theta)$

$y = r \sin( \theta)$

and

${x}^{2} + {y}^{2} = {r}^{2}$

This implies that

${( {r}^{2} )}^{2} = 4(( { r \cos\theta) }^{2} - {(r \sin\theta) }^{2} )$

Let us evaluate the exponents to get:

${r}^{4} = 4({ {r}^{2} \cos^{2}\theta } - {r}^{2} \sin^{2}\theta)$

Factor the RHS to get:

${r}^{4} = 4{r}^{2} ({ \cos^{2}\theta } - \sin^{2}\theta)$

Divide through by r²

${r}^{2} = 4 ({ \cos^{2}\theta } - \sin^{2}\theta)$

Apply the double angle identity

$\cos^{2}\theta -\sin^{2}\theta= \cos(2 \theta)$

The polar equation then becomes:

${r}^{2} = 4 \cos2\theta$

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3 years ago

I need help with this as fast as possible thanks bye

makvit [3.9K]

Answer:

153.9

Step-by-step explanation:

You use the formula πr^2 for the area, where r is the radius of the circle which is equal to half the diameter

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3 years ago

An Internet service provider charges $9.95/month for the first 20 hours and $0.50 for each additional hour. Write an expression

inn [45]

I= 9.95 + .5h

20-35=15
I = 9.95+.5(15)
9.95+7.5
I = 17.45

If you used the internet for 35 hours, your bill would be $17.45

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3 years ago

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