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

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Question 328327: how do you graph this?
-3x+6y=36
-x+2y=-8
Click here to see answer by Fombitz(32388)

Question 328473: How do you do linear equations?
Click here to see answer by nyc_function(2741)

Question 328571: y = x�
Find y when x=(3) and (-3)

Click here to see answer by stanbon(75887)

Question 328449: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40 miles per hour and train B is traveling at 48 miles per hour. Train A passes a station at 3:10 A.M. If train B passes the same station at 3:25 A.M, at what time will train B catch up to train A??

When will train B catch up to train A??
Click here to see answer by checkley77(12844)

Question 328606: This is the question that is on my homework... Select the graph from the choices below that is a solution to the following system of equations:
-3x +4y = 12
6x - 8y =16
I Cant put graphs up on here so can you please tell me how to solve this question and give somewhat of an algorithem on how you do these steps?
Thank you for your Time.
Click here to see answer by josmiceli(19441)

Question 328618: Please help, show work. thanks!
solve the system.
x+y=12
x-y=2
Click here to see answer by Alan3354(69443)

Question 328595: Complete the equation of the line L satisfying each of the following sets of geometric conditions by determining the value of b0 in the equation:
y = b1x + b0
L has slope of 3/4 and x-intercept of (-4,0)
Click here to see answer by Fombitz(32388)

Question 328724: what would de answer be for this system of equation, using substitution or elimination?
3x-2y=5
-6x+4y=7

Click here to see answer by stanbon(75887)

Question 328760: solve the system of equations graphically. y=3x-12
Click here to see answer by Fombitz(32388)

Question 328853: Solve the following system of equations for the unknown variables.
x + y = 12
x � y = �2
Click here to see answer by Fombitz(32388)

Question 329016: You have been hired by a group of anthropologists to sort out the data that they collected from a trip to Ja-Ji, a remote island in the south Pacific. The people of Ja-Ji do not permit outsiders to count them directly; so, the anthropologists had to collect all sort of other data to get to the population. They fear that they may have missed something and your job is to make that assessment, or better yet, use what they have to get the population of Ja-Ji. This is what their notes say:
People in Ja-Ji are either single or in monogamous unions. 10% of the adult population of Ja-Ji is homosexual and they are all in long term relationships. These homosexual unions constitute one fifth of the unions in Ja-Ji. There are 1,000 children, which constitute half of the single population of Ja-Ji.
HOW DO I SET THIS ONE UP?
Click here to see answer by scott8148(6628)

Question 329030: Q) Find the angle θ (in radians and degrees) between the lines. Round to three decimal places, if necessary.
6x + 2y = 9
�5x + 6y = 4
Click here to see answer by Fombitz(32388)

Question 329127: Use the substitution method to find all solutions of the system equations.
4. x^2 + y^2 = 25
y = 2x
6. x^2 + y = 9
x- y + 3 = 0
8. x^2 - y = 1
2x^2 + 3y = 17
Click here to see answer by Fombitz(32388)

Question 329268: Solve the system of equations by using substitution:
{ y=4-x }
{4x+3y=10}
Click here to see answer by solver91311(24713)

Question 329329: How do you solve:
(w+5)-(2w+5)=5
Click here to see answer by mananth(16946)

Question 329273: please Express in simplest radical form:
reduce radical to simplest term:
2sqrt(3) - 8sqrt(3)
Then add: -6sqrt(3)
Click here to see answer by coyparra@yahoo.com(2)

Question 329541: The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the situation.
x + y = 56
b. The sales representative later indicates that there are three times as many homes available with the second floor plan than the first. Write an equation that illustrates this situation. Use the same variables you used in Part a.

x + 3y = 56

c. Use the equations from Parts a. and b. of this exercise as a system of equations. Use substitution to determine how many of each type of floor plan is available. Describe the steps you used to solve the problem.
d. What are the intercepts of the equation from Part a. of this problem? What are the intercepts from Part b. of this problem? Where would the lines intersect if you solved the system by graphing?
Click here to see answer by stanbon(75887)

Question 329622: Simplify showing steps:
(2x)^-2(2y)^3(4x)
thank you
Click here to see answer by stanbon(75887)

Question 329620: Find the value of "a" if a line containing the point (a,-2a) has a y-intercept of 6 and slope of -2/3.
thank you
Click here to see answer by stanbon(75887)

Question 329621: Write the equation of the bisector of the segment joining the points with coordinates of (-3,4) and (5,-2)
thank you
Click here to see answer by stanbon(75887)

Question 329801: Help please!
I tried to solve these but I'm not sure if its correct.

4x � 3y = 1
X = 1 � y
4/7 and y = 3/7

8 x � 6y = 0
X + y = 134
x = 39/28 and y = 13/7

I'm also having trouble solving these. Can you please help? (you can use any convenient method)
-3 - 7z = 27,
-6x + y - 5z = `45
4x + 4y - 6z =0
x + 4y + z = 11
3x + 4y = 7
5x + 2y + 2z =19
-5X +5y + z = 8
9x + 8y + 9z = 116
x + 2y + 9z = 86
Thank you in advance!
Click here to see answer by edjones(8007)

Question 330006: x+y=15
x-y=-3
what is the solution?
is it consistent or inconsistent?
dependent or independent?
Click here to see answer by Fombitz(32388)

Question 330295: Solve the system of equations by the method of your choice. Are the equations independent, dependent, or inconsistent?
x + y=4 and x-y=5?
Thank you
Shelley
Click here to see answer by jim_thompson5910(35256)

Question 330438: steps to solveY = -4x -3
Click here to see answer by solver91311(24713)

Question 330585: Classify the following system of equations:
4x − 5y = 10
3y = 7x + 14

Click here to see answer by nyc_function(2741)

Question 330557: -2x + 3y=0
2x + 6y=3
Click here to see answer by Fombitz(32388)

Question 330485: Need help with the problem below.Thanks in advance.
Systems of Equations
Solve the following problems for X and Y in these two system equations, and for X and Y and Z, in these three system equations.
X+10Y+Z=52.....5X+Y+4Z=15.....X+2y-3Z=12..... X=? Y=? Z=?

Click here to see answer by Fombitz(32388)

Question 330688: How does (2,0); (3,0) equial 3x+2y=6
can you explain so I can help my daugther
Click here to see answer by rfer(16322)

Question 330688: How does (2,0); (3,0) equial 3x+2y=6
can you explain so I can help my daugther
Click here to see answer by solver91311(24713)

Question 330818: substitution:
2x+y=5
x-2y=3
Click here to see answer by Fombitz(32388)

Question 330858: Solve the system of equations:
y = x^2 - 4^x + 4 and y = -x^2 + 6x - 8

Click here to see answer by privani(34)

Question 330858: Solve the system of equations:
y = x^2 - 4^x + 4 and y = -x^2 + 6x - 8

Click here to see answer by Fombitz(32388)

Question 330737: f(x) = 2x + 5 when f(7) and f(8)
Click here to see answer by privani(34)

Question 329888: Solve the system by substitution
x + 7y = -2
3x + y =34
Click here to see answer by privani(34)

Question 329869: How would you solve -4x(squared) + 6xy when x = -2 and y = 5
Click here to see answer by privani(34)

Question 330856: Solve the system of equations:
y = x2 + 3x + 5 and y = x2 - 2x - 5

Click here to see answer by Fombitz(32388)

Question 329842: Wireless phone company A charges $20 per month plus $0.12 per minute. Wireless phone company B charges $50 per month plus $0.06 per minute. For how many minutes of calls will the monthly bills be the same?
(A) 80 minutes
(B) 100 minutes
(C) 160 minutes
(D) 250 minutes
(E) 500 minutes
Click here to see answer by privani(34)

Question 330495: If the lengths of a pair of opposite sides of a rectangle were doubled and the other pair of opposite sides were each decreased by 14 m, the new rectangle would be a square with a perimeter of 84 m. Find the rectangle's original dimensions. ........
Click here to see answer by privani(34)

Question 330868: How do I determine if these are consistent or inconsistent?
2x + y = 7
x - 2y = 7
Click here to see answer by Fombitz(32388)

Question 330867: I'm some problems with my algebra lesson. It's systems of equations. I am suppose to figure out if the ordered pair of (8,-1) is a solution to the systems: 2x + 3y = 13 and x - y = 19. I know how to do this, just not with this problem. On the second equation I am confused as to what the x and the y are supposed to be, number wise. What do I do with the x and y when there is no other number?
Click here to see answer by Alan3354(69443)

Question 329663: Solve this system with three linear equations....
4x+3y-5z=-29
3x-7y-z=-19
2x+5y+2z=-10
Thanks!!!
Click here to see answer by Fombitz(32388)

Question 330909: how do you know if its above or below the line

Click here to see answer by Fombitz(32388)

Question 331164: How can i solve this equation;
7x+5y=9
4x+5y=6
Click here to see answer by AAfter.Com(18)

Question 331163: solve by substitution method (linear equation) x-5y=4 and 3x-4y=12

Click here to see answer by AAfter.Com(18)

Question 331341: How many liters of a 30% alcohol solution must be mixed with 90 liters of a 60% solution to get 40% solution?
Click here to see answer by checkley77(12844)

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