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Vitek1552 [10]
3 years ago
14

(Please Help!) Find the radius of a circle so that its area and circumference have the same value.

Mathematics
1 answer:
Lapatulllka [165]3 years ago
4 0

Answer:

the radius must equal 2

Step-by-step explanation:

A = pi * r^2       C = 2 * pi *r

set them equal

pi * r^2 = 2 * pi *r

divide both sides by pi

r^2 = 2 * r

divide both sides by r

r^2 /r = 2r/r

r = 2


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Answer the following questions regarding the graphed inequality.
arsen [322]

Answer:

m = 0.5, b = 2, greater than symbol >

Step-by-step explanation:

Slope:

We can find the slope value by choosing two points on our line (the two green dots are already chosen for us) and dividing the vertical distance between the points (this is called the rise) by the horizontal distance between the points (this is called the run)

Rise ÷ Run

1 ÷ 2 = 0.5

Y-Intercept:

The y-intercept is where the line cuts through the vertical y-axis. We can see that this is at y = 2

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The area above the line is shaded in. This is to show that all values greater than the line are applicable, so we will use the greater than symbol, >

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What is 5 1/6 divided by (2 2/3 multiplied by 1 3/8)
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3 years ago
Answer true and false please<br> thanks
Aleksandr [31]
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How can you use the quadratic formula to complete a square?
Marina86 [1]
It has become somewhat fashionable to have students derive the Quadratic Formula themselves; this is done by completing the square for the generic quadratic equation ax2 + bx + c = 0. While I can understand the impulse (showing students how the Formula was invented, and thereby providing a concrete example of the usefulness of abstract symbolic manipulation), the computations involved are often a bit beyond the average student at this point.
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From delta math:<br> Subtract -2x^2 + 3x - 9 from 8x^2 + 10x - 10
Leto [7]

Answer:

10x^2 + 7x - 1

Step-by-step explanation:

Step 1: Build the expression in numerical form.

  • (8x^2 +10x - 10) - (-2x^2 + 3x - 9)

Step 2: Distribute the negative sign.

  • 8x^2 +10x -10 + (-1)(-2x^2) + (-1)(3x) + (-1)(-9)
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Step 3: Combine like terms.

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  • 10x^2 +7x -1

Therefore, the answer is 10x^2 + 7x -1.

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