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

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Question 107142: can someone please help me solve this problem? 3(x-2)-5(2x-1)>0. The greater than sign should have a _ under it.
Click here to see answer by stanbon(75887)

Question 107142: can someone please help me solve this problem? 3(x-2)-5(2x-1)>0. The greater than sign should have a _ under it.
Click here to see answer by edjones(8007)

Question 107137: How do I simplify (3a^2b^3)^4. Someone please help me I have a test coming up soon.
Thank You,
Ty
Click here to see answer by bucky(2189)

Question 107139: I have to solxe this problem for x (if there is an inequality express it in interval notation: x-5<2orx-5>2. Please help me.

Click here to see answer by edjones(8007)

Question 107155: Write and equation of the line containing (5,-2) and (8,4)
a. 2x-y=12
b.x-2y=9
c.2x+y=20
Click here to see answer by jim_thompson5910(35256)

Question 107231: Write an equation in standard form for the line that has an undefined slope and passes through (-2,8)
Click here to see answer by Earlsdon(6294)

Question 107231: Write an equation in standard form for the line that has an undefined slope and passes through (-2,8)
Click here to see answer by 3356(1)

Question 107255: solve each of the following problem by addititon. if a unique solution does not exist, state whether the system is inconsistent or dependent.
2x+3y=1
5x+3y=16
Click here to see answer by Annabelle1(69)

Question 107332: I'm not really clear on how to set up this type of problem. Any insight would be greatly appreciated. x+y=12
y=3x
Click here to see answer by ptaylor(2198)

Question 107332: I'm not really clear on how to set up this type of problem. Any insight would be greatly appreciated. x+y=12
y=3x
Click here to see answer by Fombitz(32388)

Question 107399: V= pie r sqaure h, solve for h
c= d/g solve for g
Click here to see answer by Annabelle1(69)

Question 107447: Solve the following by graphing:
2x - y = 4
2x - y = 6
Second problem
2x - 2y = 8
3x - 2y = 1
Third problem
3x - 6y = 9
x - 2y = 3
Click here to see answer by Annabelle1(69)

Question 107450: Find the values for m and b in the following systems so that the solution to the system is (1,2).
mx + 3y =8
-3x + 4y = b
Find the values for m and b in the following systems so that the solution to the systme is (-3,4).
5x + 7y = b
mx + y = 22
Click here to see answer by stanbon(75887)

Question 107478: Solve by any appropriate method.(Substitution or Elimination, I prefer Elimination). L1-(-4,4)and(2,-2) L2-(1,1) and (-3,3). I don't even know where to begin and our teacher and not provided any examples for this type of problem. He doesn't use the book much and I have tried to find examples and am unsuccessful.
Click here to see answer by stanbon(75887)

Question 107522: Solve each of the following systems by graphing:
x - 2y = 8
3x - 2y = 12
and
3x - 6y = 9
x - 2y = 3
Click here to see answer by checkley71(8403)

Question 107530: x/3 + y = 3
x/2 - y/4 = 1

Click here to see answer by solver91311(24713)

Question 107542: Mr. Irwin and Ms. Lippi are math teachers. They have a total of 46 years of teaching. Two years ago Mr. Irwin had taught 2.5 times as many years as Ms. Lippi. How long has each taught?
Click here to see answer by stanbon(75887)

Question 107543: A limited of a book published by a historical society was offered for sale to its members. The cost was one book for $12 or 2 books for $20. The society sold 880 books, and the total amount of money taken in was $9840. How many members ordered 2 books?
Click here to see answer by scott8148(6628)

Question 107697: rewrite the equation 2x-3y= -6 as a function of x
Click here to see answer by stanbon(75887)

Question 107697: rewrite the equation 2x-3y= -6 as a function of x
Click here to see answer by solver91311(24713)

Question 107690: solve the system by addition
5x+7y=12
x-4y= -3
Click here to see answer by jim_thompson5910(35256)

Question 107751: given g(x)= -3x-3, find g(2a)
Click here to see answer by stanbon(75887)

Question 107749: given f(x)=x^2-3x-7, find f(5)
Click here to see answer by scott8148(6628)

Question 107750: given f(x)= -x^3+2x^2-2x-2, find f(-2) and f(0)
Click here to see answer by checkley71(8403)

Question 107694: solve the system by addition or substitution
-15x+3y=6
y=2+5x
Click here to see answer by HyperBrain(694)

Question 107912: solve the linear system:
3x + 3y= 5
y= -x
Please help! thank you
Click here to see answer by jim_thompson5910(35256)

Question 108047: (A linear system) Solve using matrix inverse method. (A^-1B=X)
A-Bear's Catering service charges its customers according to the number of servings of each item that is supplied at the party. The table shows the number of servings of jambalaya, crawfish pie, file' gumbo, iced tea' and dessert for the last five customers along with the total cost of each party. What amount
does A-Bear's charge per serving of each item? Write all equations that would be used to solve this system.Be sure to define all variables.
Jambalaya Crawfish pie File' gumbo Iced tea Dessert cost
Boudreax 36 28 35 90 68 344.35
Thibodeaux 37 19 56 84 75 369.10
Fontenot 49 55 70 150 125 588.90
Arceneaux 58 34 52 122 132 529.50
Gautreaux 44 65 39 133 120 521.65
Write the matrix A=
write the matrix B=
write the matrix x=
This is a homework question that me and other classmates have been trying to figure out, but can't. We don't even know where to start.

Click here to see answer by stanbon(75887)

Question 108022: Write an equation of a line that is perpendicular to y= -3/4x + 2 and passes through (-4,1)
Click here to see answer by checkley71(8403)

Question 108081: solve system by addition, then state Y value
x+y=28
x-y=12
Click here to see answer by checkley71(8403)

Question 108048: use substitution to solve each system of equations. if the systemdoes not have exactly one solution,state whether it has no solution or infintely many solutions?
Click here to see answer by elima(1433)

Question 108208: What is the anser of if the coordinates are (2,6) and the slope is -1?
Click here to see answer by checkley71(8403)

Question 108238: daughter needs help, and so do i apparently, sure would like to know the procedure for solving this: 8y+5z=4390
y+z= 680 , any help is more that appreciated,
thanx phil
Click here to see answer by stanbon(75887)

Question 108198: please help me solve this equation:
x-3y=0
2x+3y+3z=18
x+2y-4z=10
Click here to see answer by scott8148(6628)

Question 108215: a train averaged 36 miles per hour and took 8 hours to travel from chicago to st.louis. what is the distance between chicag and st.louis?
Click here to see answer by elima(1433)

Question 108261: Kevin works 3 times as many hours in a week as Karen does. If each were to work 6h more per week, Kevin would be working twice as many hours as Karen does. How many hours does each work now?
Click here to see answer by wgunther(43)

Question 108384: Given f(x) = �x3 � 3x2 + 3x + 7, find f(�1), f(0), and f(2)
Click here to see answer by elima(1433)

Question 108482: Solve the system by addition.
4x � 6y = �1
8x + 3y = 3

Click here to see answer by elima(1433)

Question 108612: how would you do 6x+5=29? can you break it down for me? thank you =]
Click here to see answer by stanbon(75887)

Question 108615: How do we determine which method is better for graphing a system?
Click here to see answer by anne(47)

Question 108748: 1} x+2y=1
2} 2x+y=5
Click here to see answer by elima(1433)

Question 108868: Find the mean and the median.
�7, �1, 3, 9, 10, 16

Click here to see answer by checkley71(8403)

Question 108867: Solve the system by addition or substitution.
3x � 4y = 8
6x � 2y = 10

Click here to see answer by checkley71(8403)

Question 108869: Combine like terms.
6a2 + 4a + 5 + 3a2 + 7a � 2

Click here to see answer by stanbon(75887)

Question 108938: How do I do a linear equation of
a+d=100
1.00a+1.50=120
can you give me the steps to do so.
Click here to see answer by Fombitz(32388)

Question 109118: Find the slope of the line passing through the points (14, 6) and (9, 1).
Click here to see answer by jim_thompson5910(35256)

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