2 years ago

What is (-25) - 55 =

Mathematics

1 answer:

Aleonysh [2.5K]2 years ago

3 0

Answer:

-80

Step-by-step explanation:

-25+-55=-80

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djyliett [7]

Answer:

the second one

Step-by-step explanation:

420 minus 20 for every week "W" until the balance is at 240 dollars

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2 years ago

If an object that is 85 ft. long is represented on a scale drawing as a line 5 in. long, what is the scale used to make the draw

wolverine [178]

The answer is A.
85/5 is 17 and scales are unit rates. Also, process of elimination.

7 0

2 years ago

204 thousands equals

jeka57 [31]

204 thousand equals 204,000 or two hundred and four thousand.
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2 years ago

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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2 years ago

If one exterior angle is 4x-2 and the exterior angle equals 120, what is angle X

Evgen [1.6K]

Answer:

x is 30 because 4*30 is 120 and minus 2 is 118

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2 years ago