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)

Question

Asked 3/31/2014 12:24:40 PM

Updated 7/10/2014 1:06:09 AM

4 Answers/Comments

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Question

Asked 3/31/2014 12:24:40 PM

Updated 7/10/2014 1:06:09 AM

4 Answers/Comments

This conversation has been flagged as incorrect.

Rating

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)

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

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)

–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]

Question 1 of 20
5.0 Points
Combine like terms.
(-3y2 - 7y - 9) - (4y2 + 6y + 9)
A. y2 - y
B. -9y2 - 11y - 18
C. 7y2 13y 18
D. -7y2 - 13y - 18
**Weegy:** (-3y2 - 7y - 9) - (4y2 + 6y + 9) = -7y2 - 13y - 18
**User:**
Question 2 of 20
5.0 Points
Name the binomial you can multiply by (x + 9) to get the product x2 + 5x - 36.
A. 4 - x
B. x + 6
C. x - 4
D. x - 6
**Weegy:** x - 4 is the binomial you can multiply by (x + 9) to get the product x2 + 5x - 36. **User:**
Question 4 of 20
5.0 Points
Simplify the product.
(x - 4)(x + 3)
A. x2 - 7x - 12
B. x2 + x - 12
C. x2 - x - 12
D. x2 - 12x - 1
**Weegy:** (x - 4)(x + 3) = x^2 - x - 12 **User:**
Question 6 of 20
5.0 Points
Suppose you mark n points on a circle, where n is a whole number greater than 1. The number of segments you can draw that connect these points is
.
How many segments can you draw if you mark 8 points on the circle?
A. 56 segments
B. 32 segments
C. 60 segments
D. 28 segments
(More)

Question

Not Answered

Updated 7/10/2014 1:12:48 AM

0 Answers/Comments

Question 6 of 20
5.0 Points
Below are the graphs of y = | x | and y = | x | - 9 . How are the graphs related?
A. The graphs have the same shape. The y-intercept of y = | x | is 0 and the x-intercept of the second graph is –9.
B. The graphs have the same y-intercept. The second graph is steeper than y = | x | .
C. The two graphs are the same.
D. The graphs have the same shape. The y-intercept of y = | x | is 0 and the y-intercept of the second graph is –
**Weegy:** We are not capable of viewing graphs here in weegy. **User:**
Question 7 of 20
5.0 Points
The table shows the height of a plant as it grows. What equation in point-slope form gives the plant’s height at any time? Let y stand for the height of the plant in cm and let x stand for the time in months.
Time (months)
Plant Height (cm)
3
15
5
25
7
35
9
45
A. y – 15 = (x – 3)
B. y – 15 = 5(x – 3)
C. y – 3 = (x – 15)
D. The relationship cannot be modeled.
**Weegy:** B. y ? 15 = 5(x ? 3) **User:**
Question 8 of 20
5.0 Points
Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y when x = –2?
A. y = –0.75x; 1.50
B. y = –1.33x; 2.67
C. y = 1.33x; –2.67
D. y = 0.13x; –0.25
**Weegy:** The answer is B. y = 1.33x; 2.67 **User:**
Question 9 of 20
5.0 Points
The scatter plot shows the number of mistakes a piano student makes during a recital versus the amount of time the student practiced for the recital. How many mistakes do you expect the student to make at the recital after 6 hours of practicing?
A. 55 mistakes
B. 37 mistakes
C. 63 mistakes
D. 45 mistakes
**Weegy:** A. 55 mistakes **User:**
Question 11 of 20
5.0 Points
Write an equation of a line with the given slope and y-intercept. m = –5, b = –3
A. y = –5x – 3
B. y = –5x + 3
C. y = 5x – 3
D. y = –3x – 5
**Weegy:** -2 is the y-intercept for the equation: y = 5x ? 2 **User:**
Question 12 of 20
5.0 Points
Write an equation in point-slope form for the line through the given point with the given slope. (8, 3); m = 6
A. y + 3 = 6(x - 8)
B. y - 3 = 6(x - 8)
C. y - 3 = 6(x + 8)
D. y + 3 = 6x + 8
**Weegy:** b
**User:**
Question 13 of 20
5.0 Points
What are the slope and y-intercept of the graph of the given equation?
y = –4x + 2
A. The slope is –2 and the y-intercept is –4.
B. The slope is 2 and ... (More)

Question

Not Answered

Updated 11/21/2014 1:39:47 AM

5 Answers/Comments

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

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [11/21/2014 2:11:03 AM]

The slope and y-intercept of the graph of the given equation of y = –4x + 2 is: The slope is -4 and the y-intercept is 2 .

Added 11/21/2014 1:28:01 AM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [11/21/2014 2:16:31 AM]

The slope of the line that passes through the pair of points: (1, 7), (10, 1) is -2/3.

Slope = (1 - 7)/(10 - 1 = -6/9 = -2/3 .

Slope = (1 - 7)/(10 - 1 = -6/9 = -2/3 .

Added 11/21/2014 1:29:32 AM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [11/21/2014 2:33:08 AM]

Write y = x + 5 in standard form using integers is x - y = -5.

Added 11/21/2014 1:30:33 AM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [11/21/2014 2:23:55 AM]

The equation for the line that is parallel to the given line and passes through the given point. y = x + 8; (2, 16) is y = x + 14 .

y - 16 = x - 2

y = x - 2 + 16

y = x + 14 is the equation .

y - 16 = x - 2

y = x - 2 + 16

y = x + 14 is the equation .

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]

Question 14 of 20
5.0 Points
What is the slope of the line that passes through the pair of points? (1, 7), (10, 1)
A. 3/2
B. -2/3
C. -3/2
D. 2/3
**Weegy:** The slope of the line that passes through (0, 0) and (-2, -3) is: 3/2 **User:**
Question 15 of 20
5.0 Points
The table shows the height of a plant as it grows. What equation in point-slope form gives the plant’s height at any time? Let y stand for the height of the plant in cm and let x stand for the time in months.
Time (months)
Plant Height (cm)
3
15
5
25
7
35
9
45
A. y – 15 = (x – 3)
B. y – 15 = 5(x – 3)
C. y – 3 = (x – 15)
**Weegy:** B. y ? 15 = 5(x ? 3) **User:**
Question 16 of 20
5.0 Points
What are the slope and y-intercept of the graph of the given equation?
y = –4x + 2
A. The slope is –2 and the y-intercept is –4.
B. The slope is 2 and the y-intercept is –4.
C. The slope is 4 and the y-intercept is –2.
D. The slope is –4 and the y-intercept is 2.
**User:**
Question 18 of 20
5.0 Points
Below are the graphs of y = | x | and y = | x | - 9 . How are the graphs related?
A. The graphs have the same shape. The y-intercept of y = | x | is 0 and the x-intercept of the second graph is –9.
B. The graphs have the same y-intercept. The second graph is steeper than y = | x | .
C. The two graphs are the same.
D. The graphs have the same shape. The y-intercept of y = | x | is 0 and the y-intercept of the second graph is –9.
**Weegy:** We are not capable of viewing graphs here in weegy. **User:**
Question 19 of 20
5.0 Points
The number of sofas a factory produces varies directly with the number of hours the machinery is operational. Suppose the factory can produce 455 sofas in 48 hours. What is an equation that relates the number of sofas produced, n, with the amount of time, t, in hours? What is the graph of your equation?
A. n = 9.48t
B. n = 0.11t
C. t = 4.74n
D. t = 9.48n
**Weegy:** d **User:**
Question 20 of 20
5.0 Points
Find the slope of the line.
A.
B.
C. -2
D. 2
**Weegy:** TRUE. 0 > -2.
**User:** ... (More)

Question

Not Answered

Updated 3/31/2014 10:08:51 PM

5 Answers/Comments

The slope of the line that passes through the pair of points (1, 7), (10, 1) is B. -2/3

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]

The slope and y-intercept of the graph of the given equation y = –4x + 2 is D. The slope is –4 and the y-intercept is 2.

Added 3/31/2014 10:01:31 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [3/31/2014 10:07:08 PM]

The relationship between the graphs of y = | x | and y = | x | - 9 is: D. The graphs have the same shape. The y-intercept of y = | x | is 0 and the y-intercept of the second graph is –9.

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]

Suppose the factory can produce 455 sofas in 48 hours. Then it can produce 455/48 = 9.48 sofas per hour. The equation that relates the number of sofas produced, n, with the amount of time, t, in hours is: A. n = 9.48t

Added 3/31/2014 10:06:41 PM

This answer has been confirmed as correct and helpful.

Confirmed by jeifunk [3/31/2014 10:07:09 PM]

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