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igomit [66]
3 years ago
15

Find the slope of a line parallel to each given line

Mathematics
1 answer:
rewona [7]3 years ago
6 0

Answer:

7) D

8) A

9) A

10) D

11) C

12) B

Step-by-step explanation:

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Please help math
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\displaystyle\\
15(2a - 2) = 5(a^2 -1) \\  \\ 
30a - 30 = 5a^2-5\\\\
-5a^2 + 30a -30 + 5 =0\\\\
-5a^2 + 30a -25 =0 ~~~~~\Big| \times (-1) \\\\
5a^2 - 30a +25 = 0~~~~~\Big| : 5 \\\\
a^2 - 6a +5 = 0 \\  \\ 
a_{12}= \frac{-b\pm \sqrt{b^2-4ac}}{2a}= \frac{6\pm \sqrt{36-20}}{2}= \frac{6\pm \sqrt{16}}{2}=\frac{6\pm 4}{2}= \boxed{3\pm 2} \\  \\ 
a_1 = 3+ 2 = \boxed{5}\\\\
a_2 = 3-2 = \boxed{1}



8 0
3 years ago
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The image represents what geometric construction?
boyakko [2]
<span>C) 
Parallel lines construction  


because they are parallel to each other</span>
8 0
3 years ago
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What is the center of (13,-2),(-1,-2),(6,-9)
goldfiish [28.3K]

Answer:

The center is [-1,-2

Step-by-step explanation:

6 0
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A string of decorative lights is 25 feet long. The first light on the string is 16 inches from the plug. The lights on the strin
joja [24]
25 feet = 25 x 12 = 300 inches

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Answer  72 lights
8 0
3 years ago
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