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Question 4 of 20 5.0 Points What is the solution of the system? Use substitution. y = x + 6 y = 2x A. (6, 12) B. (–12, –6) C. (–6, –12) D. (2, 4)
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Asked 3/31/2014 12:24:40 PM
Updated 7/10/2014 1:06:09 AM
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User: Question 4 of 20 5.0 Points What is the solution of the system? Use substitution. y = x + 6 y = 2x A. (6, 12) B. (–12, –6) C. (–6, –12) D. (2, 4)

Weegy: d
bankai123|Points 0|

User: Question 5 of 20 5.0 Points How many solutions does the system have? x = -4y + 4 2x + 8y = 8 A. one solution B. two solutions C. infinitely many solutions D. no solution

Weegy: The answer is D. no solution
alfred123|Points 10754|

User: Question 8 of 20 5.0 Points The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $1.80. Today they made $98.80 from the 70 wraps sold. How many of the wraps sold were vegetarian? A. 36 wraps B. 37 wraps C. 30 wraps D. 34 wraps

Weegy: The answer is 34 vegetarian wraps sold. [ v = vegetarian wrap c = chicken wrap v + c = 70 c = 70 - v v($1) + c($1.8) = $98.80 1v + 1.8c = 98.8 10v + 18c = 988 10v + 18(70 - v) =988 10v + 1260 - 18v = 988 -8v = -272 v = 34 ]
jher000|Points 8066|

User: Question 9 of 20 5.0 Points What is the solution of the system? Use substitution. x = –2y + 10 –6y = 6x – 6 z = –3x + 10y A. x = 9, y = –8, z = 114 B. x = –8, y = 9, z = 114 C. x = –8, y = 114, z = 9 D. x = 114, y = 9, z = –8

Weegy: A. x = 9, y = 8, z = 114 is the answer.
OxTornado007|Points 6899|

User: Question 11 of 20 5.0 Points What is the solution of the system? Use elimination. 3x – 4y = 9 –3x + 2y = 9 A. (3, 9) B. (–27, –9) C. (–3, –6) D. (–9, –9)

Weegy: D. ( 9, 9)
selymi|Points 13915|

User: Question 12 of 20 5.0 Points The local zoo has two water tanks for the elephant exhibit that are leaking One water tank contains 12 gal of water and is leaking at a constant rate of 3 gal/h. The second water tank contains 8 gal of water and is leaking at a constant rate of 5 gal/h. When will the two tanks have the same amount of water? Explain. Let x = the number of hours the tanks are filling and let y = the number of gallons in the tank. A. In 2 hours, because the solution to the system is (2,18). B. They will never have the same amount of water because the solution to the system is (–2,18). It is not possible to have time be –2 hours. C. In –2 hours, because the solution to the system is (–2,18). D. They will never have the same amount of water because the solution to the system is (–2,18). It is not possible to have –2 gallons in the tanks.

Weegy: B. They will never have the same amount of water because the solution to the system is ( 2,18). It is not possible to have time be 2 hours.
louispayne|Points 100|

User: Question 15 of 20 5.0 Points What is the solution of the system? Use a graph. y = –3x + 2 y = –3x + 4 A. no solutions B. (0, 2) C. infinitely many solutions D.

Weegy: the solution of the system has actually C. infinitely many solutions.
OxTornado007|Points 6899|

User: Question 16 of 20 5.0 Points The local zoo is filling two water tanks for the elephant exhibit. One water tank contains 34 gal of water and is filled at a constant rate of 4 gal/h. The second water tank contains 30 gal of water and is filled at a constant rate of 2 gal/h. Explain. Let x = the number of hours the tanks are filling and let y = the number of gallons in the tank. What are the constraints on the system? A. both x0, y0 B. x0 only C. y0 only D. There are no constraints on the system.

Question
Asked 3/31/2014 12:24:40 PM
Updated 7/10/2014 1:06:09 AM
4 Answers/Comments
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3
y = x + 6
y = 2x
substitute y in the first equation:
2x = x + 6
2x - x = 6
x = 6,
y = 2(6) = 12
The solution for the system y = x + 6 y = 2x is (6, 12)
Added 7/10/2014 12:58:55 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [7/10/2014 1:24:33 AM]
3
x = -4y + 4
2x + 8y = 8
substitute x in the second equation:
2(-4y + 4) + 8y = 8
-8y + 8 + 8y = 8
-8y + 8y = 8 - 8
0 = 0
There are infinitely many solutions for the system x = -4y + 4 2x + 8y = 8
Added 7/10/2014 1:03:13 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [7/10/2014 1:24:58 AM]
3
3x – 4y = 9
–3x + 2y = 9
adding up equations the result is:
-2y = 18
y = -9
3x - 4(-9) = 9
3x + 36 = 9
3x = 9 - 36 = -27
x = -9
The solution set for the system 3x – 4y = 9 –3x + 2y = 9 is (-9, -9)
Added 7/10/2014 1:04:50 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [7/10/2014 1:25:33 AM]
3
There are no solution for the system y = –3x + 2 y = –3x + 4 since the two lines have the same slope and are parallel to each other.
Added 7/10/2014 1:06:09 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [7/10/2014 1:25:47 AM]
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Updated 11/21/2014 1:39:47 AM
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Write an equation of a line with the given slope and y-intercept : m = –5, b = –3 is y = -5x - 3 .
Added 11/21/2014 1:26:54 AM
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Confirmed by jeifunk [11/21/2014 2:11:03 AM]
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Added 11/21/2014 1:28:01 AM
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Confirmed by jeifunk [11/21/2014 2:33:08 AM]
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Added 11/21/2014 1:30:33 AM
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Added 11/21/2014 1:32:01 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [11/21/2014 2:24:13 AM]
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Updated 3/31/2014 10:08:51 PM
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Added 3/31/2014 9:59:46 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [3/31/2014 10:07:08 PM]
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Confirmed by jeifunk [3/31/2014 10:07:08 PM]
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Added 3/31/2014 10:03:33 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [3/31/2014 10:07:09 PM]
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