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3 years ago

Where do I put one set of parentheses in this equation?

Mathematics

1 answer:

julia-pushkina [17]3 years ago

5 0

Answer:

You could put a set of parentheses around $8^{2}$ ÷ $4$

Step-by-step explanation:

Division or multiplication (depending on which one is in the equation. In our case, it's division) always has to be solved first.
Therefore, you would put your parentheses around $8^{2}$ ÷ $4$

I hope this helps!

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If x² + xy – 3y = 3, then at the point (2, 1), dy/dx

Scilla [17]

Answer:

Step-by-step explanation:

We have the equation:

$x^2+xy-3y=3$

Take the derivative of both sides with respect to x:

$\frac{d}{dx}[x^2+xy-3y]=\frac{d}{dx}[3]$

Implicitly differentiate:

$2x+y+x\frac{dy}{dx}-3\frac{dy}{dx}=0$

Solve for dy/dx:

$\frac{dy}{dx}(x-3)=-2x-y\\$

Divide:

$\frac{dy}{dx}=-\frac{2x+y}{x-3}$

To find dy/dx at (2, 1), substitute 2 for x and 1 for y. So:

$\frac{dy}{dx}_{(2, 1)}=-\frac{2(2)+1}{2-3}=-\frac{5}{-1}=5$

Hence, our answer is A.

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3 years ago

So what is the answer?

Dimas [21]

Answer for what?????

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3 years ago

The cake store is having a 25% off sale on all of its cakes. If the cake you want regularly costs $9 how much would you save wit

Gre4nikov [31]

9(.25)=2.25
You would save $2.25

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3 years ago

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2 years ago

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Which set of ordered pairs represent a function

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The 3rd set, no x or y numbers are repeated.

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