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

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Question 665403: What is the solution to this system of linear equations using the substitution method?
1/2x-1/5y=6
1/6+2/5y=9
Click here to see answer by MathTherapy(10552)

Question 664850: Find the general form equation of the line that contains (-3,2) and has a slope of 1/2
Click here to see answer by ReadingBoosters(3246)

Question 664850: Find the general form equation of the line that contains (-3,2) and has a slope of 1/2
Click here to see answer by MathTherapy(10552)

Question 665556: -6x-2y=20
y=-8x-15
Click here to see answer by lynnlo(4176)

Question 665625: Solve the following system of equations for y.
3x - 2y - 7 = 0
5x + y - 3 = 0
y =
Click here to see answer by lynnlo(4176)

Question 665656: How to solve for y and x using substitution and with y=x+(-1) and y=-4x+14
Click here to see answer by ReadingBoosters(3246)

Question 665824: 5x+y=22
4x-4y=8
solve by substitution
Click here to see answer by MathLover1(20850)

Question 665825: A grand tour of four cities begins at city A and makes successive stops at cities B, C, and D before returning to city A. If the cities are located as shown in the accompanying figure, find the total distance covered on the tour. (Give your answer correct to the nearest mile.)
. miles
(Graph is not drawn to exact scale. Coordinates of cities are listed below the graph for reference.)

City A (0, 0), City B (450, 300), City C (-810, 760), City D (-810, 0)

Click here to see answer by MathLover1(20850)

Question 665994: 10. x^4 � 13x^2 + 36 ≥ 0
Click here to see answer by ReadingBoosters(3246)

Question 665993: 1-2/x>15/x^2
Click here to see answer by lynnlo(4176)

Question 666129: I've tried to work out these coordinate pairs questions but am so stuck -I just need help with the first one to know how to proceed-please help me- Question: Complete these coordinate pairs so they satisfy the given rule A) y=x+7 (0, )(1, ),(2, ),(3, ),(4, ) -Thanks LK
Click here to see answer by Alan3354(69443)

Question 666243: I'm really bad at this stuff, I have a whole packet on it... It's extra credit and the whole packet it due Monday, October 15,2012

5x-2y=14
Click here to see answer by Alan3354(69443)

Question 666347: how do you find distance between points
Click here to see answer by Katiebug24(19)

Question 666347: how do you find distance between points
Click here to see answer by ReadingBoosters(3246)

Question 666483: 1/3 Y = 8 solve for y

Click here to see answer by lynnlo(4176)

Question 666499: Write a linear equation to fit the following data(linear regression)
1)Through (7,12) with m = -4/5
2) Perpendicular to 3x-4y=8 and through (-1,1)
3) Parallel to 3x-4y=8 and through (-1,1)

Click here to see answer by mananth(16946)

Question 666506: solve using elimination
5x-2y=8x-1
2x+7y=4y+9
Click here to see answer by lynnlo(4176)

Question 666578: please solve the system of linear equation by elimination method
x-y/x+y=4/5
7x-13y=50

i need its answer today..please

Click here to see answer by best82(13)

Question 666578: please solve the system of linear equation by elimination method
x-y/x+y=4/5
7x-13y=50

i need its answer today..please

Click here to see answer by Alan3354(69443)

Question 666643: What is the solutions of x and y for the equations x+y=1 and 2x-y=-2?
Click here to see answer by ewatrrr(24785)

Question 666679: y=4x;(-7,-28)
is it a solution
Click here to see answer by lynnlo(4176)

Question 666679: y=4x;(-7,-28)
is it a solution
Click here to see answer by MathTherapy(10552)

Question 666696: if you wanted to make the graph y=6x+7 less steep which equation could you use

multiple choice:
A)y=10x+7
B)y=6x+4
C)y=-6x+7
D)y=2x+7
Click here to see answer by vleith(2983)

Question 667138: After robbing a bank in Dodge City, a robber gallops off at 14 mi/h. 30 minutes later, the marshall leaves to pursue the robber at 15 mi/h. How long (in hours) does it take the marshall to catch up to the robber?
Click here to see answer by josmiceli(19441)

Question 667169: what the follwing system of equation by substitution and check. x-y=13 9x-y=45
Click here to see answer by mananth(16946)

Question 667188: how do you solve 4x+y=7

Click here to see answer by MathLover1(20850)

Question 667207: 4x+6y=15
-x+2y=5
Click here to see answer by ewatrrr(24785)

Question 667274: Find the slope of the line through the pair of points. A(2, �3), P(2, 9) A. 0 B. 2/3 C. -1/3D. undefined
Click here to see answer by ewatrrr(24785)

Question 667289: How do you solve the system -4x-6y=-12 and y=5x+19 using substitution?
Click here to see answer by ewatrrr(24785)

Question 667794: Extremely bad at math.
3/2 (5x + 7) = 16
3/2 * 2/3 (5x+7) = 16 * 2/3
5x+7=48/2
16 2 48
(--*-- = --- )
1 3 2
5x+7=48/2
Simplify
5x+7=24
-7 -7
---------
5x=17
17/5=3.4
Is that correct/

Click here to see answer by ewatrrr(24785)

Question 667804: 5/9 = 4/4x-3
9*4=36
5*2x-3=10x-3=7x
7x/36 <- Is that right?
Click here to see answer by Alan3354(69443)

Question 667828: Graph the linear system and estimate the solution. Then check the solution algebraically.
Problem # 25
y=5x
y=x+4
Click here to see answer by ewatrrr(24785)

Question 667884: I try doing but I got stuck on the last part. How do you solve ((3x^2)(6x^-1)^2/(16y^3)(5y^-1)). I got 108x^0/80y^2 but you have to simplify it which is 27/20y^2 but I do not understand how they got the 27 from.
Click here to see answer by MathTherapy(10552)

Question 667925: 5x+3y=22 5x-2y=2
Click here to see answer by stanbon(75887)

Question 667923: Use Standard form (x and y intercept) to graph
1) X- INTERCEPT = -2, Y-INTERCEPT = -2
What exactly am I supposed to do i don't know if I'm supposed to solve this or graph it. I'm stuck on what to do and my cap math class teacher gives no example on what it is I'm supposed to do or notes to assisst. What is this problem asking and how do I solve others like it?
Click here to see answer by ewatrrr(24785)

Question 667928: how do i solve 5x+3y=22 5x-2y=2
Click here to see answer by ewatrrr(24785)

Question 668034: -4x+4y=-8
x-4y=-7 Need to solve using system of elimination
Click here to see answer by Alan3354(69443)

Question 668059: 5x+3y+2z=-4
-5x-4y-2z=7
4x+2y+2z=-2
Solve with substitution or elimination
Click here to see answer by Alan3354(69443)

Question 668175: A basketball player scored 20 times during one game. He scored a total of 39 points, two for each two-point shot and one for each free throw. How many two-point shots did he make? How many free throws did he make?
Click here to see answer by Adrianne15(25)

Question 668197: Alvin paddled for 4 hourswith a 3km/h current to reach a campsite. The return trip against the same current took 7 hours. What is the speed of the boat in still water? What is the speed of the boat against the current?
Click here to see answer by swincher4391(1107)

Question 668169: I have to solve this problem using the substitution method. 4x-y=6 and 9x-2y=16. I have no idea how to do this.
Click here to see answer by ankor@dixie-net.com(22740)

Question 668277: find the slope, the y-intercept, and graph each line
-2x + 1/4y = 3/2
Click here to see answer by ReadingBoosters(3246)

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