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2 years ago

Identify the trinomial that is not a perfect square.

Mathematics

1 answer:

ANEK [815]2 years ago

6 0

The answer is 36x^2 − 20x + 9

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Find gradient xe^y + 4 ln y = x² at (1, 1)

cricket20 [7]

$xe^y+4\ln y=x^2$

Differentiate both sides with respect to x, assuming y = y(x).

$\dfrac{\mathrm d(xe^y+4\ln y)}{\mathrm dx}=\dfrac{\mathrm d(x^2)}{\mathrm dx}$

$\dfrac{\mathrm d(xe^y)}{\mathrm dx}+\dfrac{\mathrm d(4\ln y)}{\mathrm dx}=2x$

$\dfrac{\mathrm d(x)}{\mathrm dx}e^y+x\dfrac{\mathrm d(e^y)}{\mathrm dx}+\dfrac4y\dfrac{\mathrm dy}{\mathrm dx}=2x$

$e^y+xe^y\dfrac{\mathrm dy}{\mathrm dx}+\dfrac4y\dfrac{\mathrm dy}{\mathrm dx}=2x$

Solve for dy/dx :

$e^y+\left(xe^y+\dfrac4y\right)\dfrac{\mathrm dy}{\mathrm dx}=2x$

$\left(xe^y+\dfrac4y\right)\dfrac{\mathrm dy}{\mathrm dx}=2x-e^y$

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{2x-e^y}{xe^y+\frac4y}$

If y ≠ 0, we can write

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{2xy-ye^y}{xye^y+4}$

At the point (1, 1), the derivative is

$\dfrac{\mathrm dy}{\mathrm dx}\bigg|_{x=1,y=1}=\boxed{\dfrac{2-e}{e+4}}$

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3 years ago

Solve for a!!!!!!!!!!

malfutka [58]

Answer:

a = 4

Step-by-step explanation:

ur welcome

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2 years ago

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Will give brainliest for 5marks

anastassius [24]

Answer:

$230

Step-by-step explanation:

Work hours Monday till Friday:

3.5 + 5 + 2.5 + 4 + 2 = 18 hours

Payment for 5 days:

15*$8 + (18 - 15)*$10 = $150

Payment for Saturday:

5*2*$8 = $80

Total payment:

$150 + $80 = $230

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Left Wic loves her pet frogs. If she spends $4.92 for a dozen frogs how much would one frog cost Leftwich

blagie [28]

Answer:

$0.41

Step-by-step explanation:

4.92 ÷ 12 = .41 (Look at drawing)

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3 years ago

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Help me answer this please FAST

Mnenie [13.5K]

Answer:

Step-by-step explanation:do you know what x is

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