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2 years ago

5. Which equation is an open sentence?

Mathematics

1 answer:

dimaraw [331]2 years ago

5 0

Answer:

Step-by-step explanation:

there is an unknown thingy which is x

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(11-5) + 6) + 13 - 42<br> Pls help I’ll mark brainliest

g100num [7]

Answer:

-17

Step-by-step explanation:

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2 years ago

Find the slope of the line going through the points (-5, 2) and (-1,5).

Karolina [17]

The slope would be 3/4 because 5 - 2 is 3 and -1 - (-5) is 4. Hope this helps!

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2 years ago

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12. Raul invests $6500 at a simple interest rate of 4%. How much will he earn

kenny6666 [7]

Answer:

$1,560

Step-by-step explanation:

Interest = Principal x Interest Rate x Time (in years)

I = 6500(.04)(6)

I = 1560

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1 year ago

Doreen bought 2 liters of lemonade. How many millimeters of lemonade did Doreen buy?

MatroZZZ [7]

Answer:

Mr. Perkins changed the oil in his car. He bought. 6 liters of oil. He put 4,500 ml in his car.

Step-by-step explanation:

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2 years ago

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Identify the radius and center.<br><br> x^2 + y^2 - 2x + 4y - 11 = 0

miss Akunina [59]

<h2>Hello!</h2>

The answer is:

Center: (1,-2)

Radius: 4 units.

To solve the problem, using the given formula of a circle, we need to find its standard equation form which is equal to:

$(x-h)^{2}+(y-k)^{2}=r^{2}$

Where,

"h" and "k"are the coordinates of the center of the circle and "r" is its radius.

So, we need to complete the square for both variable "x" and "y".

The given equation is:

$x^2+y^2-2x+4y-11=0$

So, solving we have:

$x^2+y^2-2x+4y=11$

$(x^2-2x+(\frac{2}{2})^{2} )+(y^2+4y+(\frac{4}{2})^{2})=11+(\frac{2}{2})^{2} +(\frac{4}{2})^{2}\\\\(x^2-2x+1)+(y^2+4y+4)=11+1+4\\\\(x^2-1)+(y^2+2)=16$

$(x^2-1)+(y^2-(-2))=16$

Now, we have that:

$h=1\\k=-2\\r=\sqrt{16}=4$

So,

Center: (1,-2)

Radius: 4 units.

Have a nice day!

Note: I have attached a picture for better understanding.

5 0

2 years ago