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Lisa [10]
2 years ago
6

Can u explain how to solve this?

Mathematics
1 answer:
svlad2 [7]2 years ago
5 0

Answer: B.pi/2

ABCD is a square

=> Δ ABD is a  isosceles right triangle at A

using pythago theorem, we have:

AB² + AD² = BD²

=> 2AD² = 4

⇔ AD² = 2

⇒ AD = √2

through O, draw EF parallel to AD and BC

=> EF is  diameter

because EF//AD => EF = AD = √2 (because circle O is inscribed the square ABCD)

=> the area of the circle is S=\frac{(\sqrt{2})^{2}  }{4}.\pi =\frac{\pi }{2}

Step-by-step explanation:

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the starving actors guild holds its annual winter arts festival in hopes of raising $13,344 by selling 824 tickets. The guild ch
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A + c = 824                             represents number of tickets to sell
20a + 12c = 13,344                represents cost of each type of ticket

multiply equation 1 by -12 to cancel the variable 'c' and solve for 'a'

-12(a + c = 824)

-12a - 12c = - 9888
 20a + 12c = 13,344         add equations together
-----------------------------
    8a          = 3456           divide both sides by 8
     a = 432

To find children's tickets substitute adult numbers back into equation 1.
a + c = 824
432 + c = 824
subtract 432 from both sides
c = 392

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3 years ago
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All of them? Pls reply if so!

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3 years ago
When you have 6 significant numbers and want to get 9 what do you do
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V(0,0).

Use the following points for graphing:

Y = -2x^2.

(x,y)

(-2,-8)

(-1,-2)

V(0,0)

(1,-2)

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Y = -2x^2 + 4.

h = Xv = -B/2A = 0/-4 = 0.

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V(0,4).

(-2,-4)

(-1,2)

V(0,4)

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