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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
1 Answer/Comment
(2m + 3)(m^2 – 2m + 1)
= 2m^3 - 4m^2 + 2m + 3m^2 - 6m + 3
= 2m^3 - m^2 - 4m + 3
Added 1/19/2018 7:12:36 PM
This answer has been confirmed as correct and helpful.
Lori rented a car for one day. The daily rental rate was $12.50 plus 25 cents per mile. The total cost of her rental was $46. How many miles did she drive that day? A. 46 B. 134 C. 50 D. 96
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Updated 9/6/2021 1:23:47 PM
1 Answer/Comment
Lori rented a car for one day. The daily rental rate was $12.50 plus 25 cents per mile. The total cost of her rental was $46. Lori drove 134 miles that day:
$46 - 12.50 = $33.50.
$33.50 / 0.25 = 134.
Added 9/6/2021 1:23:47 PM
This answer has been confirmed as correct and helpful.
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