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Tom has a collection of 30 CDs and Nita has a collection of 18 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 5 CDs a month to her collection. Find the number of months after which they will have the same number of CDs.
A. 1 month
B. 3 months
C. 2 months
D. 33 months **Weegy:** equation to show work:
1x + 30 = ?
5x + 18 = ?
x = the number of moths
x = 3 **User:** What is the solution of the system?y = –3x + 2
y = –3x + 4 **Weegy:** 2(2x/3 + 7) - 3 = 5x 4x/3 + 14 - 3 = 5x 11 = 11x/3 x = 3 y = 2(3)/3 + 7 = 9 x(y) = 3(9) = 18. Answer is d. **User:** What is the solution of the system?y = x + 5
y = –5x – 1 **Weegy:** x=2 **User:** 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:** A. (6, 12). 12 = 6 + 6, 12 = 6 * 2. **User:** 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. **User:** A corner store sells two kinds of baked goods: cakes and pies. A cake costs $5 and a pie costs $7. In one day, the store sold 15 baked goods for a total of $91. How many cakes did they sell?
A. 7 cakes
B. 4 cakes
C. 8 cakes
D. 5 cakes **Weegy:** A. 7 cakes **User:** 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:** B. two solutions **User:** 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:** 2(2x/3 + 7) - 3 = 5x 4x/3 + 14 - 3 = 5x 11 = 11x/3 x = 3 y = 2(3)/3 + 7 = 9 x(y) = 3(9) = 18. Answer is d. (More)

Question

Expert Answered

Updated 6/16/2014 8:38:43 AM

2 Answers/Comments

y = x + 5

y = –5x – 1

institute y in the second equation the result is:

x + 5 = -5x - 1

x + 5x = -1 - 5

6x = -6

x = -1

y = -1 + 5 = 4

The solution for the system y = x + 5 y = –5x – 1 is (-1, 4)

y = –5x – 1

institute y in the second equation the result is:

x + 5 = -5x - 1

x + 5x = -1 - 5

6x = -6

x = -1

y = -1 + 5 = 4

The solution for the system y = x + 5 y = –5x – 1 is (-1, 4)

Added 6/16/2014 8:34:23 AM

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 for the system 3x – 4y = 9 –3x + 2y = 9 is (-9, -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 for the system 3x – 4y = 9 –3x + 2y = 9 is (-9, -9)

Added 6/16/2014 8:38:43 AM

y = –3x + 2
y = –3x + 4
A.
no solutions
B.
(0, 2)
C.
infinitely many solutions
D.
(0, 4) **Weegy:** C. infinitely many solutions **User:** 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. **User:** 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:** B. two solutions (More)

Question

Expert Answered

Updated 6/16/2014 8:31:43 AM

2 Answers/Comments

There are no solutions for the system y = –3x + 2, y = –3x + 4 since the two lines are parallel.

Added 6/16/2014 8:30:34 AM

This answer has been confirmed as correct, not copied, and helpful.

Confirmed by andrewpallarca [6/16/2014 8:33:52 AM]

There are infinitely many solutions for the system x = -4y + 4, 2x + 8y = 8.

Added 6/16/2014 8:31:32 AM

This answer has been confirmed as correct, not copied, and helpful.

Confirmed by andrewpallarca [6/16/2014 8:34:01 AM]

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