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2 years ago

Help please by tomorrow

Mathematics

2 answers:

maxonik [38]2 years ago

6 0

Answer:

You multiply 4 by 7 then you get 28

slava [35]2 years ago

3 0

Answer:

Step-by-step explanation:

You substitute 4 in every space that has an n. 6+4 does not equal 24, so a is out. 5 times 4 is 20, not 54. 12-4=8, not 16. So the last is 7 times 4, which is 28, so this is the correct answer.

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Assuming that the equations define x and y implicitly as differentiable functions x=f(t),y=g(t) find the slope of the curve x=f(

Mumz [18]

The given equations are
$x(t+1)-4t \sqrt{x} =9$ (1)
$2y+4y^{3/2}=t^{3}+t$ (2)

When t=0, obtain
$x=9 \\ 2y+4y^{3/2}=0 \,\,=\ \textgreater \ \, y(1+2 \sqrt{y} )=0 \,=\ \textgreater \ \,y=0$

Obtain derivatives of (1) and find x'(0).
x' (t+1) + x - 4√x - 4t*[(1/2)*1/√x = 0
x' (t+1) + x - 4√x -27/√x = 0
When t=0, obtain
x'(0) + x(0) - 4√x(0) = 0
x'(0) + 9 - 4*3 = 0
x'(0) = 3
Here, x' means $\frac{dx}{dt}$ .

Obtain the derivative of (2) and find y'(0).
2y' + 4*(3/2)*(√y)*(y') = 3t² + 1
When t=0, obtain
2y'(0) +6√y(0) * y'(0) = 1
2y'(0) = 1
y'(0) = 1/2.
Here, y' means $\frac{dy}{dt}$ .

Because $\frac{dy}{dx} = \frac{dy}{dt} / \frac{dx}{dt}$ , obtain
$\frac{dy}{dx} |_{t=0}\, = \frac{1/2}{3}= \frac{1}{6}$

Answer:
The slope of the curve at t=0 is 1/6.

3 0

3 years ago

What is the remainder of (x^3-6x^2-9x+3)/(x-3)

marta [7]

Thw answer is -51
Found through long division

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3 years ago

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=
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3 years ago

If the perimeter of a rectangle is 38 cm and the area is 78 square cm, then what are the dimensions of the rectangle?

nexus9112 [7]

The length is 13 and the width is 6. The way I figured it out is: find two factors of the area (that if multiplied with each other, they equal the area) and see which ones add up and then get multiplied by two to find the perimeter. I found 6 and 13 and then added them together to get 19. Then I multiplied 19 by two and got 38. This is how I have always done it idk.

Your answer is length = 13 and width = 6.
hope this helps :)

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3 years ago

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MariettaO [177]

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3 years ago

Read 2 more answers

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