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scoundrel [369]
3 years ago
13

The equation of a circle is x2 + y2 = 56.25. Find the radius of the circle?

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
7 0

Answer:

r = 7.5

Step-by-step explanation:

Circle equation: (x - h)^2 + (y - k)^2 = r^2

Since we are already give <em>r²</em>, we simply just take the square root of 56.25, and we should get 7.5 as our final answer!

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Multiply total meters by 100 to get total centimeters:

6 meters x 100 = 600 centimeters.

Now divide total centimeters by 2.554 to get total inches:

600 centimeters / 2.54 = 236.22 inches.

Rounded to the nearest inch = 236 inches.

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What is the minimum angle of rotational symmetry for the quadrilateral shown below?
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3 years ago
Which method would be best (quickest) for solving the system below:<br> 3x - 4y = -2<br> y = 2x + 1
taurus [48]
To solve with Elimination:

Write the equations under one another, like this:

2x - y = -1
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Ideally, we would like for one of the variables to be eliminated when we add vertically (straight down). But if we add them as they are this does not happen. We must manipulate one of the equations so that it will happen. Again, you can try to eliminate either x or y. I always look for a term that has a coefficient of 1 (or negative 1). So, let's use that y from the first equation again.

If the coefficient of the y in the other equation is POSITIVE 4, then I need the coefficient from the first equation to be its opposite, NEGATIVE 4. To do this, simply multiply the first equation by 4, this will create MAGIC!

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Be certain to Distribute across the entire first equation, so multiply all three terms by 4.

8x - 4y = -4
+ 3x + 4y = 26

Now add straight down (vertically). The y term will be eliminated.

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Divide both sides of the equation by 11.

x = 2

Almost there! Now, substitute the 2 in for x in either of the original equations. Either one will work. I'm gonna use the second equation.

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Subtract 6 from both sides of the equation.

4y = 20

Divide both sides of the equation by 4.

y = 5

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8 0
3 years ago
Write an equivalent expression by distributing the
melamori03 [73]

Answer:

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Step-by-step explanation:

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