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qwelly [4]
3 years ago
10

Please help! The expressions 3x - 9 and 23 - 5x represent the lengths (in feet) of two sides of an equilateral triangle. Find th

e length of a side. Show your work.
Mathematics
1 answer:
valentina_108 [34]3 years ago
5 0
An equilateral triangle has 3 congruent sides so the 2 expressions above are equal
3x - 9= 23 - 5x
And then you solve for x
-22=-2x
X=11
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Step-by-step explanation:

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Which of the following disjunctions is false ?
notsponge [240]
A disjunction is false if both parts of the disjunction are false; otherwise, it is true
----------------------------------------------
Choice A

4-3=2 is false
6*3=9 is false

both parts are false, so overall the entire disjunction is false
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Choice B

5*6=30 is true
3+4=7 is true

Neither part is false, so overall the entire thing is true
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Choice C

8+3=11 is true
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Choice D

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5*2=10 is true

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In summary, we have

A. False
B. True
C. True
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7 0
3 years ago
How do you solve 4b^2+8b+7=4 using the quadratic formula
lina2011 [118]

4b^2+8b+7=4\\
4b^2+8b+3=0\\\\
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x=\dfrac{-8\pm\sqrt{8^2-4\cdot4\cdot3}}{2\cdot4}\\
x=\dfrac{-8\pm\sqrt{64-48}}{8}\\
x=\dfrac{-8\pm\sqrt{16}}{8}\\
x=\dfrac{-8\pm4}{8}\\
x=\dfrac{-2\pm1}{2}\\
x=\dfrac{-1}{2 }\vee x=\dfrac{-3}{2}\\
x=-\dfrac{1}{2 }\vee x=-\dfrac{3}{2}
4 0
3 years ago
Read 2 more answers
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