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3 years ago

Solve each equation. d(d+3)-d(d-4)=9d-16

Mathematics

1 answer:

likoan [24]3 years ago

3 0

Answer:

2d+3d-2d+4d= 9d-16

2d is cancelled

3d+4d=9d-16

7d=9d-16

16=9d-7d

16=2

16/2

d=8

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4 lines are shown. 3 lines intersect and extend from one point forming 2 angles. The top angle is labeled 1 and the bottom angle

svp [43]

Answer:

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Step-by-step explanation:

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3 years ago

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Enter a recursive rule for the geometric sequence.

Jlenok [28]

Answer:

$x_{n} = 5 \ * \ (-2)^{n-1}$

Step-by-step explanation:

Given the geometric sequence:

5, −10, 20, −40, ...

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So, the rule for the given geometric sequence is:

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3 years ago

Consider a ﬁrm handling concessions for a sporting event. The ﬁrm’s manager needs to know whether to stock up with coffee or col

julsineya [31]

Answer: Cola is more profitable over Coffee

Step-by-step explanation:

E(cola) = 0.3 * 1500 + 0.7 * 5000

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E(coffee) = 1200 + 700

E(coffee) = 1900

From the decision tree which is attached, and the calculations above, it would be advised that the firm should focus on Cola, since it has a higher expected revenue of $3950, compared to the expected revenue of $1900 for coffee.

See the attached image for the decision tree

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4 years ago

Yan is climbing down a ladder. Each time he descends 4 rungs on the ladder, he stops to see how much farther he has to go. If Ya

aleksandr82 [10.1K]

Answer: B

Step-by-step explanation:

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3 years ago

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sesenic [268]

Hello! :)

$\large\boxed{\frac{-e^{\frac{3}{x}} (3 + 2x )}{x^{4}}}$

Find the derivative using the quotient rule:

$\frac{f(x)}{g(x)} = \frac{g(x) * f'(x) - f(x) * g'(x)}{(g(x))^{2}}$

In this instance:

$f(x) = e^{\frac{3}{x} }\\\\g(x) = x^{2}$

Use the following properties to find the derivative of f(x) and g(x):

$e^{u} = u' * e^{u}\\\\x^{n} = nx^{n-1}$

Use the quotient rule:

$\frac{x^{2} * (e^{\frac{3}{x}} * (-3x^{-2})) - e^{\frac{3}{x}} * 2x }{(x^{2} )^{2}}$

Simplify the numerator:

$\frac{(e^{\frac{3}{x}} * (-3)) - e^{\frac{3}{x}} * 2x }{(x^{2} )^{2}}$

Factor out $e^{\frac{3}{x}}$

$\frac{e^{\frac{3}{x}} (-3 - 2x )}{x^{4}}$

Factor out -1 from the numerator:

$\frac{-e^{\frac{3}{x}} (3 + 2x )}{x^{4}}$

And we're done! Thanks for posting the question to my 1000th answer!

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3 years ago

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