Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 62298: Can you explain what it means to solve a linear system using the graph-and-check method?
Click here to see answer by funmath(2933)

Question 62206: Good evening,
What is the slope of any line that is parallel to the line through (-3,-4) and (5, -1)?
Thank you.
Click here to see answer by checkley71(8403)

Question 62333: 4b-5=-t solve for b
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Question 62364: 6c-t/7=b solve for c
Click here to see answer by joyofmath(189)

Question 62372: .6m+a=b solve for m
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Question 62366: This question is from a homework worksheet.
Write each equation in standard form.
y+3=2/5(x+9)
I am using ISBN 0-07-866766-6 Algebra 1 Glencoe Mathmatics as my text book, but I can't find any illustration that tells how to do this problem. PLEASE HELP
Click here to see answer by Earlsdon(6294)

Question 62382: p(t+1)=-2 solve for t
Click here to see answer by stanbon(75887)

Question 62391: 2g-m=5-gh solve for g
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Question 62343: .6m+a=b solve for m
Click here to see answer by checkley71(8403)

Question 62339: 6c-t/7=b solve for c
Click here to see answer by 303795(602)

Question 62338:
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Question 62413: If 2x - 3y = 0 and 3x + 2y = 13, find x + y. Do I solve for x and y and then just add them. Please show me.
Click here to see answer by 303795(602)

Question 62413: If 2x - 3y = 0 and 3x + 2y = 13, find x + y. Do I solve for x and y and then just add them. Please show me.
Click here to see answer by jai_kos(139)

Question 62419: 7x-4y=40
y-x=2
Click here to see answer by funmath(2933)

Question 62306: I am having trouble solving these systems. I get lost somewhere in the middle and it becomes a mess. Please help.
x-2y-3z=4
2x-4y+5z=-3
5x-6y+4z=-7
and
2x-y=-1
-2x+z=1
y-z=0
Thank you.
Click here to see answer by ankor@dixie-net.com(22740)

Question 62472: determine the equation of the line passing through the points (4,-3) and (-4,6)
Click here to see answer by checkley71(8403)

Question 62474: 5. 3X+Y=-8
5X-Y=-16
PLEASE EXPLAIN TO ME STEP BY STEP USING THE ELIMINATION BY ADDITION METHOD.
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Question 62491: You are selling tickets for a musical at your local community college. Student tickets cost $5 and general admission tickets cost $8. If you sell 500 tickets and collect $3475, how many student tickets and how many general admission
Click here to see answer by stanbon(75887)

Question 62487: 21. 3X-2Y+-13
9X+5Y=16
I tried to solve this equation using the the process of elimination by addition method. I know I am surpose to use the lcm which i did for 3x and 9x the lcm would be 18 by using this method I still came up with the wrong answer the book has (1,5) can you tell me what I am doing wrong? thanks
Click here to see answer by stanbon(75887)

Question 62496: One type of gasohol is 10% alcohol and another type is 35% alcohol. How much of each type must be mixed to obtain 400 gallons of a 25% alcohol mixture?
Click here to see answer by checkley71(8403)

Question 62475: An angle and its components always have a sum of 90 degrees. The sum of the measures og the angle and five times its complement is 298 degrees. What is the measure of the angle?
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Question 62511: 13. 2x+3y=8
3x-2y+-1 I have the lcm as 1 for ea equation but the right answer is (1,2) last equation is right but the first one is incorrect. please help
Click here to see answer by stanbon(75887)

Question 62571: 33. .2x=.3y-2
1.5y=x+.8
35. 0.5x+2y=1.15
-3x+0.4y=-0.7
I was having some problems with these two equation I know that I have to use 10 and multiply by the decimal number but the ans is off or incorrect. Please help me with this step by step. Thanks!!!
Click here to see answer by funmath(2933)

Question 62581: 37. x/4-y/3=4
x/4-y/4=-1
39. 2/5x-1/6y=7/10
3/4x-2/3y=19/8
I tried solving these equations I know the lcd the first equation is 30 and 24 the lcm is 3,2 the book has the correct ans for 39 is (1/2,-3).
37 equation is alittle confusing or maybe I am making to difficult. please help me.
Click here to see answer by stanbon(75887)

Question 62650: hello
solve by graphing to show independent, inconsistent or dependent:

2x - 3y = 12
3y - 2x = -12
tks!
Click here to see answer by funmath(2933)

Question 62649: Hello,
solve and how to determine if the system is independent, inconsistent or dependent:
y = 3x - 5
y = 3x +2
thks!
Click here to see answer by funmath(2933)

Question 62510: 13. 2x+3y=8
3x-2y+-1 I have the lcm as 1 for ea equation but the right answer is (1,2) last equation is right but the first one is incorrect. please help
Click here to see answer by checkley71(8403)

Question 62120: THE INSTRUCTIONS SAYS: SOLVE THE SYSTEM OF EQUATIONS USING SUBSTITUTION METHOD
1. X=y+5
x-y+1
3. x-y+5
3x+2y+7
5. 2x-y+-5
4x+y=2
7. x+2y=9
x+2y+1
I AM VERY CONFUSED WORKING AND SOLVING THE SYSTEM OF EQUATIONS USING SUBSTITUTION METHOD.. HELP!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 62295: Can you explain what it means to solve a linear system using the graph-and-check method?
Click here to see answer by ankor@dixie-net.com(22740)

Question 62708: 19. this cause for me to solve the system of equations using elimination by addition method this equation I had problems solving can you help me?
3x+5y=-19
6x+7y=-23
43. 2.1x-0.6y=8.4
-1.5x-0.3y=-6 this equation i used the 10 to change to a whole number and the answer was incorrect the book ans is (4,0)intersecting
Click here to see answer by 303795(602)

Question 62801: The inventor of a new product believes that the cost of producing the product is given by the function
C(x) = 1.75x + 7000
If the inventor charges $4 per unit, then her profit for producing and selling x units is given by the function P(x) = 2.25x - 7000
(a) What is her profit if she sells 2000 units?
(b) What is her profit if she sells 5000 units?
(c) What is the break-even point for sales?

Click here to see answer by funmath(2933)

Question 62878: Can u pease help me w/ the following problem... 4(3x-4)=8(17-8)
Click here to see answer by checkley71(8403)

Question 62900: help please!
Solve the equation for x and y. x+2y=-5 x=2y-1

choices are: (5,3) (5,0) (-3,-1) (1,-3)
Click here to see answer by praseenakos@yahoo.com(507)

Question 62900: help please!
Solve the equation for x and y. x+2y=-5 x=2y-1

choices are: (5,3) (5,0) (-3,-1) (1,-3)
Click here to see answer by funmath(2933)

Question 62820: 49. 9x-12y=18
2y=-x+1
47. X+Y=1
0.75X+0.5Y=2.21
When I tried to solve 47 according to the book my calulations are wrong the book ans is 6.84,-5.84 and for 49 the book ans is (8/5,-3/10 from both of these equation I got different ans. can you help me!!
Click here to see answer by checkley71(8403)

Question 62919: find k so the system is inconsistent:
x-6ky=5k
(k+10)y=(k-1)x-(k+8)
thanks so much for your help!
Click here to see answer by venugopalramana(3286)

Question 62985: Determine if the following equations are linear.
3x + 2(x-4y)=2x-y
x-3 over 2 = 4+y over 5

x-2x^2+3= x-7 over 2

Determine the x and y intercepts of the following linear equations, if possible, and then graph the equations.
4x-3y=12 x+2y=7 y-x=x-y

Click here to see answer by stanbon(75887)

Question 63064: Solve the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
x + 5y = 10
-2x - 10y = -20

Click here to see answer by funmath(2933)

Question 63173: Simpliy: This is so complicated please help.
2/z^2 - 3/2 / 2/5z^2 + 1/3z
Click here to see answer by ankor@dixie-net.com(22740)

Question 63368: Write an equation in slop-intercept form for the line with the given condition that contains the point (6,-2): Parallel to the line 2x+y=5
Click here to see answer by venugopalramana(3286)

Question 63548: 3x+5y=1
4x-5y=2
2x+3y+5=0
Then instructions says to find the slope of the line.
I tried working these problems but I am not fully understanding what to do first. Can you give me a break down step by step how to do these problems. thanks so much for your help.
Click here to see answer by venugopalramana(3286)

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