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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 312474: simplify the following expression:
3x^3 y^4 z^-2
--------------
6x^-1 y^3 z^-3
I don't get how to do it, I've tried everything, Please help
Click here to see answer by rapaljer(4671)

Question 312578: Solve this linear system. 2y=3x+2 (Give answer in ordered pair)
Solve this linear system. 3x-4y=8 (Give answer in ordered pair)
Click here to see answer by checkley77(12844)

Question 312660: what is 9-x-4x=11
Click here to see answer by rfer(16322)

Question 312702: Please help me solve this:
The length of a rectangle is 6 cm more than the width. The perimeter is 156 cm. Find the length of the rectangle.

Click here to see answer by Fombitz(32388)

Question 312682: Write an equation of the line containing the given point and parallel to the given line? (-8,5)4x=5y+3.
Click here to see answer by Fombitz(32388)

Question 312700: Classify the following system of equations:
3x + 5y = 6
10y = 6x + 3

Click here to see answer by Fombitz(32388)

Question 312762: how to learn scientific notation?
Click here to see answer by rapaljer(4671)

Question 312623: An earthquake has a duration of 0.3 seconds and a amplitude of 7,500 micrometers. Find the measure on the Richter scale.

R=log A over P
Click here to see answer by Fombitz(32388)

Question 312863: what is x and y? answered with systems of equations solving with substitution
-8x-7y=-12, -7x-6y=-11
Click here to see answer by checkley77(12844)

Question 313246: The area of a rectangle is 24 square centimeters and its side lengths are x centimeters and x + 2 centimenters.
a. find the side lengths of a rectangle. justify your answer
b. find the perimeter of the rectangle
Click here to see answer by checkley77(12844)

Question 313259: Hello I have a problem, but cant seem to find out what i am doing wrong. The equations are solutions to systems of linear equations in three variables.
2x+ y-3z=-12
3x-2y-z= 3
-x+5y+2z=-3
I know you have to work only two equations at a time. My teacher took the class through it step by step but i'm thinking im making a mistake on my adding or subtracting because i keep coming out with the wrong answer.
THanks
Kayla
Click here to see answer by Alan3354(69443)

Question 313451: i was wondering how you would do these following problems there not my homework there examples I took from the algbra textbook about systems of inequalities and graphing a linear inequality, graphing a system of inequalities.
1) y<=4x-1
2) -2x+3y<-6
3) 5x+3y>-6 and 2y+x<6
4) 2x-3y>=9 and -x-4y>=8
Click here to see answer by nyc_function(2741)

Question 313471: i really dont understand this lesson well. so my teacher gave me this problem to do on my own and i was wondering was this right:2x-3y=12,x-y=-5

-3y=-2x-12 -y=-x+5
y=2/3x+4 y=x+5
Click here to see answer by OmniMaestra(21)

Question 313568: slove the system of equations by graphing then classify the system.
y + -x -10
4x -3y+16
solve by the substitution method
9x-2y=-91
7x+73=y
solve by the sub method
2m+n=1
m-6n=7
Click here to see answer by solver91311(24713)

Question 313567: slove the system of equations by graphing then classify the system. x + y+10
x - y+ -2
#2 slove the system equation by graphing 6 x - y +39
6 x + 7y + -33
#3 5 u + v +0
5u + v + 10
is the system consistent/ inconsistent
independent/ dependent
Click here to see answer by solver91311(24713)

Question 313694: x+y=56 y=3x solve these using substitution, The number 56 equals the number of houses available for sale, and there are two different floor plans available (x&y)I am trying to determine how many of each type there is.
Click here to see answer by stanbon(75887)

Question 313708: If I have the ordered pairs of (2,54) &(54,2) How would I figure out where they would intersect. I know there is an equation for it but I can't remember hwo to get it started.
Click here to see answer by Alan3354(69443)

Question 313703: During a publicity campaign, a cycle shop gave away 5000 miniature cycles and bumper stickets. The cycles cost $0.21 each and the bumper stickers cost $0.14 each. The cycle stop spent $826 on the gifts. How many of each gift did they buy?
Click here to see answer by rfer(16322)

Question 313929: Hello,
I am trying to figure out how to find the solution for this equation.
2x-y+3z=1
-x+2y-z=-2
x+y+2z=-1
Can anybody help me solve this problem?
thanks
Click here to see answer by ankor@dixie-net.com(22740)

Question 313946: what is the y-intercept and vertex of y=x^2+2x?
Click here to see answer by checkley77(12844)

Question 313978: (2,7) x+8y=9
The equation of the line is y=
Click here to see answer by Alan3354(69443)

Question 313981: find the slope and y intercept of the line 3y+3x+2=11+3x
Click here to see answer by rapaljer(4671)

Question 313981: find the slope and y intercept of the line 3y+3x+2=11+3x
Click here to see answer by checkley77(12844)

Question 313987: write an equation of the line containing the given point and parallel to the given line y=mx+b
(2,7)x+8y=9
y=
Click here to see answer by checkley77(12844)

Question 314092: Hello,
I have to solve a linear equation but can not find a solution.
Please help me how to calculate.
x+y+z+u=1
2x+3y-4z+5u=2
3x+4y-3z+6u=0
Thank you sooo much in advance.
Click here to see answer by Theo(13342)

Question 314184: Solve the systems by the addition method
2) 3x + 9y = 15
�x + 5y = 3
Click here to see answer by Fombitz(32388)

Question 314352: 3x-2y=17
4x-5y=18
Click here to see answer by Fombitz(32388)

Question 314481: determine the value of k for which the system of linear equations has no solution:
2x-y=3 ; 4x+ky=4.
Click here to see answer by vleith(2983)

Question 314483: Determine the solution:
5/4x-2/3y=3; 1/4x+5/3y=6
Click here to see answer by eshomali(33)

Question 314704: how do yu solve y=4x-8 and y=2x+10
Click here to see answer by checkley77(12844)

Question 314704: how do yu solve y=4x-8 and y=2x+10
Click here to see answer by rapaljer(4671)

Question 314720: I am having a hard time with this problem. Can someone help me please with the steps on how it is solved as well? Thank you
Solve by substitution method.
8x+6y=-14
-6x+y=49
It's asking for a solution in an ordered pair. I have tried this problem for the past 30 min and can't seem to get the correct pair and I'm not sure what I'm doing wrong??
Click here to see answer by checkley77(12844)

Question 314703: how do yu solve 6x+4y=-12 and 8x-14y=-16
Click here to see answer by checkley77(12844)

Question 314758: Hello I was wondering if someone could help me with this problem. Use substitution method. Thank you
9x-2y=3
9x-6=y
The work I have done is this 9x-2y=3
3x-6=y
y=6+3x
9x-2(6+3x)=3
9x+12+6x=3
15x=3-12
15x=--9 <----- I know this isn't right, but I'm not sure how to make it right??
Click here to see answer by mananth(16946)

Question 314769: use the substitution method.
9x-2y=3
3x-6=4
Could someone please tell me if I did this correctly?
y=6+3x
9x-2(6+3x)=3
9x-12+6x=3
12+6=3
6x/6=12/6
x=2
y=6+3(2)=6-6=0
(2,0)
Click here to see answer by stanbon(75887)

Question 314765: y=a and x=b , a and b are real numbers. Is this dependent or independent? consostent or inconsistent? WHY
Click here to see answer by Fombitz(32388)

Question 314834: (x-3y=6) + (x+2y=4) = ?
Click here to see answer by Fombitz(32388)

Question 314842: how do we use the slope-intercept method in graphing linear equations?
Click here to see answer by Fombitz(32388)

Question 314937: Solving this linear equation with substitution.
The linear equation is:
4x-5y=20 and 5x+5y=70.
I need this solved by substitution and I must show all the work.
Thanks
Click here to see answer by Fombitz(32388)

Question 314967: what is -2x(x-8)
Click here to see answer by unlockmath(1688)

Question 315098: This is blowing my mind - the problem reads:
Consider the system y=a and x=b where a and b are real numbers. Is this system dependent or independent? Is it consistent or inconsistent? Describe the system. If it is consistent, what is the solution?
My assumption is that we are supposed to treat y=a as (0,a) on a graph and x=b as (b,0) on a graph - I believe that would mean one verticle line and one horizontal line which would eventually intersect and, therefore the system would be consistent and independent - I don't know if this is correct or not and I have no idea (other than the way I just described it) how to "describe the system". Furthermore, I have no clue as to what "the solution" would be.
Any help would be greatly appreciated - I conceptualize much better with numbers than letters (and I'm not that great dealing with the numbers).
Thank You!

Click here to see answer by Fombitz(32388)

Question 315117: find the hcf of x^2-xy-2y^2 and 2x^2-xy-y^2
Click here to see answer by malaydassharma(59)

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