4 years ago

Which of the following is a rational function

Mathematics

2 answers:

storchak [24]4 years ago

7 0

F (x) = x^2 - 9

------------------------------

7 x

Anestetic [448]4 years ago

3 0

B is the only rational answer.

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determine whether 0 is a solution of inequality. x>-3 is o a solution yes or no if yes how u get to solution

expeople1 [14]

Really !

If zero is a solution, then you can put it in place of 'x' and the statement will be true.

x > -3
Put zero in place of 'x':

Zero is greater than -3 .

Is that true ?
(Hint: Yes, it's true.)

Then zero is a solution.

8 0

4 years ago

Find the dr/d(theta) for:<br>r = (theta)sin(theta) + cos(theta)

maxonik [38]

$r=\theta\sin\theta+\cos\theta$

$\dfrac{\mathrm dr}{\mathrm d\theta}=\dfrac{\mathrm d(\theta\sin\theta)}{\mathrm d\theta}+\dfrac{\mathrm d(\cos\theta)}{\mathrm d\theta}$

By the product rule,

$\dfrac{\mathrm d(\theta\sin\theta)}{\mathrm d\theta}=\dfrac{\mathrm d(\theta)}{\mathrm d\theta}\sin\theta+\theta\dfrac{\mathrm d(\sin\theta)}{\mathrm d\theta}=\sin\theta+\theta\cos\theta$

and

$\dfrac{\mathrm d(\cos\theta)}{\mathrm d\theta}=-\sin\theta$

So we have

$\dfrac{\mathrm dr}{\mathrm d\theta}=\sin\theta+\theta\cos\theta-\sin\theta$

$\implies\dfrac{\mathrm dr}{\mathrm d\theta}=\theta\cos\theta$

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3 years ago

Scott and Teri read mystery novels. Teri has read 3 less than 5 times as many as Scott. She has read 17. How many has Scott read

natulia [17]

<span>Scott read 4. Put it this way: x=4. If = 4, then put it into an equation. 5x-3= 17. So, you add three to both sides, then it comes out as this: 5x= 20. Divide by five, and you get x= 4.</span>

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4 years ago

Read 2 more answers

A school has 415 third graders and 338 second graders. How many more third graders are there than second graders?

Aleks04 [339]

Answer:

Step-by-step explanation:

415-338=77

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3 years ago

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Picture shows the questions

SpyIntel [72]

Answer:

121 cm

Step-by-step explanation:

12x13=156

7x5= - 35

________

121

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3 years ago