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Solve the following system by any method. –8x – 8y = 0 –8x + 2y = –20 A. (0, –2) B. (–2, 2) C. (2, –2) D. (2, 2)
–8x – 8y = 0 –8x + 2y = –20 (–8x + 2y = –20) - (–8x – 8y = 0) 10y = -20 y = -20/10 y = -2 –8x – 8(-2) = 0 -8x + 16 = 0 -8x = -16 x = -16/-8 x = 2 Solution set: (2, -2)
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Asked 1/19/2018 2:00:13 PM
Updated 1/19/2018 7:35:04 PM
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–8x – 8y = 0
–8x + 2y = –20

(–8x + 2y = –20) - (–8x – 8y = 0)
10y = -20
y = -20/10
y = -2

–8x – 8(-2) = 0
-8x + 16 = 0
-8x = -16
x = -16/-8
x = 2

Solution set: (2, -2)
Added 1/19/2018 7:35:04 PM
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Multiply (2m + 3)(m2 – 2m + 1). A. 2m3 – m2 – 4m + 3 B. 2m3 – 7m2 – 4m + 2 C. 2m3 – m2 – 10m + 3 D. 2m3 – m2 – 8m + 3
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Updated 1/19/2018 7:12:36 PM
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(2m + 3)(m^2 – 2m + 1)
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= 2m^3 - m^2 - 4m + 3
Added 1/19/2018 7:12:36 PM
This answer has been confirmed as correct and helpful.
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