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vampirchik [111]
3 years ago
14

Please help! click to see the picture of the question !

Mathematics
2 answers:
katen-ka-za [31]3 years ago
8 0
First you find the area of the entire thing.
13*9=117
then find the area of the inside part
6*8=48
then subtract the inside area from the outside area
117-48=69
*immature laughter* 
ok. 69 ft. sq. is the area of the shaded area
brainliest please
Pie3 years ago
4 0
69 square feet is the answer
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What is <br><br>20-2w^2<br><br>when, w= 3​
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2

Step-by-step explanation:

Use order of operations PEMDAS

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Please help, and thank you!
lawyer [7]

Answer:

3. C

4. D

Step-by-step explanation:

3.

x^2+25=0\\x^2=-25\\x=\pm\sqrt{-25}

Once \sqrt{-1}=i

x=\pm5i

4.

A quadratic equation has no real roots when the discriminant (\Delta) is negative. \Delta.

Let's try all the equations:

(A)

2x^2-7x-9=0\\\\\Delta=\sqrt{\left(-7\right)^2-4\cdot \:2\left(-9\right)}\\\Delta=\sqrt{\left(-7\right)^2+4\cdot \:2\cdot \:9}\\\Delta=\sqrt{121} \\\Delta=11

(B)

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$x=\frac{7}{2} $

(C)

2x^2+7x-9=0\\\Delta = \sqrt{7^2-4\cdot \:2\left(-9\right)}\\\Delta = \sqrt{7^2+4\cdot \:2\cdot \:9}\\\Delta = \sqrt{121} \\\Delta= 11

(D)

2x^2-7x+9=0\\\Delta = \sqrt{\left(-7\right)^2-4\cdot \:2\cdot \:9}\\\\\Delta=\sqrt{-23} \\\Delta=\sqrt{23i}

8 0
3 years ago
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