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3 years ago

7

Levi made 50 phone calls during a charity fund raising drive and received 4 pledges for donations. If he makes 120 calls, about

how many pledges could Levi expect?

1 answer:

frutty [35]3 years ago

8 0

9 and 1/2 pledges could be expected.

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Implicit differentiation of 1/x +1/y=5 y(4)= 4/19<br> y'(4)=?

Aneli [31]

$\frac{1}{x} +\frac{1}{y} = 5\\\\x^{-1}+y^{-1}=5\\$

Above, I changed the fraction form of x and y into exponential form so it is easier to see the differentiation. Now, we can differentiate:

$-1x^{-2}+-1y^{-2}\frac{dy}{dx}=5\\\\\frac{-1}{x^2}-\frac{1}{y^2}\frac{dy}{dx}=5\\\\-\frac{1}{y^2}\frac{dy}{dx}=5+\frac{1}{x^2}\\\\\frac{dy}{dx}=-5y^2-\frac{y^2}{x^2}$

Now that we have dy/dx, we can plug in the x, which is 4, and the y, which is 4/19. We know these values of x and y because your question stated y(4) = 4/19.

$\frac{dy}{dx}=-5(\frac{4}{19})^2-\frac{(\frac{4}{19})^2}{(4)^2}\\\\\frac{dy}{dx}=-5(\frac{16}{361})-\frac{(\frac{16}{361})}{16}\\\\\frac{dy}{dx}=\frac{-80}{361}-\frac{1}{361}\\\\\frac{dy}{dx}=\frac{-81}{361}$

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4 years ago

The lowest point on a graph in the domain of the function is called its ____ ____. (2 words)

Anika [276]

<span>The lowest point on a graph in the domain of the function is called its
</span>
answer:
Absolute Minimum

4 0

3 years ago

Read 2 more answers

Determine if is y=3x^2+2x-3 linear, quadratic, or exponential.

podryga [215]

Answer:

it is quadratic

Step-by-step explanation:

a quadratic graph should look like this

MARK BRAINIEST IF IT HELPS

6 0

3 years ago

Fashion for all jeans on sale for $13 designer pants has jeans on sale for $26 write tye total costs of 1,2,3 and 4 pairs of jea

kramer

Answer:

To purchase 4 pairs of jeans at Fashion for all would cost you $52, while buying 4 pairs of jeans from designer pants would cost $104.

Step-by-step explanation:

Fashion for all jeans:

1=13

2=26

3=39

4=52

Designer jeans

1=26

2=52

3=78

4=104

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3 years ago

Please answer this question(picture included)

zlopas [31]

2xy^2 + 8y => 2y ( xy +4)

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3 years ago