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3 years ago

Write the equation of a circle with a circumference of 14pie and center (4,-1)

Mathematics

1 answer:

Pani-rosa [81]3 years ago

6 0

Answer:

(x-4)^2 + (y +1)^2=196

Step-by-step explanation:

hope this helps

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The graph of the equation 2x2 + xy + y2 = 4 is the tilted ellipse pictured below; i.e. the points (x,y) in the plane that satisf

mihalych1998 [28]

Answer:

The slope of tangent at point (1,-2) is $\frac{2}{3}$ .

Step-by-step explanation:

The given equation of ellipse is

$2x^2+xy+y^2=4$

Differentiate both sides with respect to x.

$\frac{d}{dx}(2x^2+xy+y^2)=\frac{d}{dx}(4)$

$\frac{d}{dx}(2x^2)\frac{d}{dx}(xy)+\frac{d}{dx}(y^2)=\frac{d}{dx}(4)$

$4x+x\frac{dy}{dx}+y+2y\frac{dy}{dx}=0$

$(4x+y)+(x+2y)\frac{dy}{dx}=0$

$\frac{dy}{dx}=-\frac{4x+y}{x+2y}$

Calculate the value of \frac{dy}{dx} at (1,-2).

$\frac{dy}{dx}_{(1,-2)}=-\frac{4(1)+(-2)}{(1)+2(-2)}$

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

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

Therefore the slope of tangent at point (1,-2) is $\frac{2}{3}$ .

3 0

3 years ago

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I need help will give brainliest!!!

Marysya12 [62]

Answer:

29,25,C

Step-by-step explanation:

5 0

3 years ago

A soft drink costs $1.65, and each refill for the drink costs $0.95. If you have $4.50, how many refills can you purchase?

aleksandrvk [35]

You can apurchase 3 refills

5 0

3 years ago

Read 2 more answers

posledela

Answer:

6(x-8)=5-2x

Step-by-step explanation:

let the number be x

so we have six times the difference between a number and 8

that is 6(x-8).

is equal to 5 less than twice the number ..we have

=5-2x.

therefore, our answer becomes:

6(x-8)=5-2x

5 0

3 years ago

CAN SOMEONE PLEASE HELP ME WITH MY GEOMETRY HOMEWORK PLEASE?

Kay [80]

Answer:

Option A

Step-by-step explanation:

The complete question is shown in the attachment.

The sum of angles in a triangle is 180 degrees.

This implies that:

$m\angle A+85+53=180$

m<A+138=180

m<A=180-138=42

Now we use the sine rule to find AC=b

$\frac{b}{\sin 85}=\frac{85}{\sin 42}$

This implies that:

$b=\frac{85}{\sin 42}*\sin 85$

$b=126.5$

5 0

3 years ago