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

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Question 800888: factor completely
x^12 y^10 +8x^6 y^5 z -9z^2
Please explain how i get this answer
My teacher has the answer as (x^6 y^5+ 9z)(x^6 y^5 -z)
Click here to see answer by stanbon(75887)

Question 800968: Please help me solve this equation:
3x-4y=2
2x-4y=-4
Click here to see answer by mananth(16946)

Question 801247: how to solve this problem y=6x show work

Click here to see answer by jim_thompson5910(35256)

Question 801314: y=-1
-2x-2y=-2 solve by substitution
Click here to see answer by waynest(281)

Question 801408: How do you solve y=2x+2 in substation form
6x+y=4
Click here to see answer by mananth(16946)

Question 801570: What if i have x=4y-6
How i can answer and graph that, i dont understand because my teacher always told me thar X is equals to 0.
Click here to see answer by Alan3354(69443)

Question 801572: What if I have x-y=-3
I dont understand
Click here to see answer by MathLover1(20850)

Question 801567: what is the answer of 3x+2y=-3 1x+1/3y=-4 by substitution
Click here to see answer by Cromlix(4381)

Question 802220: x y
-2 -16
-1 -20
0 -22
1 -28
2 -32
linear or non linear?
Click here to see answer by josgarithmetic(39617)

Question 802392: 5x - 2y = -1
x + 4y = 35
solve by elimination
Click here to see answer by Alan3354(69443)

Question 802534: solve the given system of equations
x+y+8z=40
x+y+6z=32
x+7y+3z=50
Click here to see answer by Alan3354(69443)

Question 802588: A snack food is made by mixing 6 lb of popcorn that costs $.80 per pound with caramel that costs $2.30 per pound. How much caramel is needed to make a mixture that costs $1.40 per pound?

Click here to see answer by josmiceli(19441)

Question 802626: Number of positive integer solutions for equation 2x +3y = 763
Click here to see answer by Edwin McCravy(20056)

Question 802909: I am very confused on using the substitution and elimination method on linear equations. Can you please explain it to me?
Click here to see answer by mananth(16946)

Question 803087: I am being asked to setup a system of linear equations for the following word problem & then use either substitution or linear combinations to solve.: There were a total of 480 tickets sold for the school play. Adult tickets sold for $8 & student tickets sold for $5. the ticket sales brought in &3,369. How many adult tickets,a, & syudent tickets,s, were sold? Write your answer as (a,s).
Click here to see answer by rfer(16322)

Question 803138: solve the linear inequality x/7+3x/14<2/7
Click here to see answer by waynest(281)

Question 803214: solve by elimination
y=2x+8
y=10x
Click here to see answer by waynest(281)

Question 803225: solve by elimination
3x-y+5=0
2y=6x+10
Click here to see answer by Alan3354(69443)

Question 803221: solve by elimination
3x-y+5=0
2y=6x+10
Click here to see answer by Alan3354(69443)

Question 803218: (1/3y)^3
Click here to see answer by Alan3354(69443)

Question 803306: I) An owner of a small business borrows money on three separate credit cards. X dollars on his Mastercard, y dollars on his Visa Card, z dollars on his American Express card. These amount satisfy the following equations.

1.18x + 1.15y + 1.09z = 11,244.25
3.54x - .55y + .27z = 3,732.75
.06x + .05y + .03z = 414.75
How much money did the owner borrow on each card

Click here to see answer by MathLover1(20850)

Question 804135: Can i Please ask for extra assistance on solving this simultaneous equation by the SUBSTITUTION Technique? Would really appreciate any help I can get.
4x+y=9
3x+2y=13
THANK YOU!
Click here to see answer by thejackal(72)

Question 804198: solve by the elimination method
2a+5b=33
-2a+b=9
determine the solution in an ordered pair
Click here to see answer by Alan3354(69443)

Question 804225: a school puts on a play. the play costs $1.200 in expenses. the student charge $4.00 for tickets. there will be one performanceof the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?
Click here to see answer by solver91311(24713)

Question 804645: I need the answer to:
3u+z=15
u+2z=10
Please show work and explain.
Click here to see answer by Alan3354(69443)

Question 805111: I need help solving these systems by substitution
y=-3x+19
y=2x-1
Click here to see answer by richwmiller(17219)

Question 805121: Solve the system, using substitution
4x + y = 4 and y = 4 - 4x
Click here to see answer by richwmiller(17219)

Question 805209: Can you solve 3n+2=14
Click here to see answer by Alan3354(69443)

Question 805302: Flying to Kampala with a tailwind a plane averaged 158 km/h. On the return trip the plane only averaged 112 km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air.

Click here to see answer by mananth(16946)

Question 804802: The sum of the digits of a two-digit number is 9. If the digits are reversed, the new number is 27 less than the original. Find the original number.
Click here to see answer by tommyt3rd(5050)

Question 805650: Solve each system by graphing, if possible
{ x - y = 4
( 2x + y = 5
Click here to see answer by josgarithmetic(39617)

Question 805769: Solve each system by graphing , if possible
{3x - y = -3
{2x + y = -7
Click here to see answer by mananth(16946)

Question 805852: Tell whether the equation is linear. If so, write the equation in standard form and give the values of A, B, and C.x+4/2= y-4/3
Click here to see answer by oscargut(2103)

Question 805894: twelve times the sum of a number and 2 is equal to 36 what is the number
Click here to see answer by trx1150(14)

Question 805918: hi iwanted to get help on this question im reviewing for math and it says
Write the equation of the quadratic function in vertex form and state the vertex of the graph.
f(x)= 32x+1-4x^2
there are options to this answer if u want to know
a: f(x)= -4(x-4)^2 +65
Vertex:(4,65)
b:f(x) -4(x+4)^2 +65
Vertex:(-65,4)
c:f(x) -4(x-4)^2 +65 vertex:65,4)
d:f(x)= -4(x+4)^2 +65 vertex (-4,65)
or E none of the above

Click here to see answer by richwmiller(17219)

Question 805985: Is 1/2y=1 a linear equation?
If so how did you find out
And if it is a linear equation, write 1/2y=1 in standered form

Click here to see answer by richwmiller(17219)

Question 805993: I need help solving each system by addition, and determine whether the equations are independent, dependent, or inconsistent. Here is the problem.
x- y=3
-6x+6y=17.

Click here to see answer by stanbon(75887)

Question 806026: I need help solving each system of equations. Here are the two question:
x+y-z=4
y =6
y+z=13

Click here to see answer by richwmiller(17219)

Question 806273: what are the x- and y- intercepts of the equation -2x+y=-2?
Click here to see answer by solver91311(24713)

Question 806715: Use the method of substitution to solve the system of
linear equations. How many solutions are there? Is
the system consistent or inconsistent?
-x + 12y = 12
2 x - y = -4
Click here to see answer by richwmiller(17219)

Question 806732: How do I solve the following inequality and graph it, subject to the non-negative restrictions.
15x - 50y < 1500, x is greater than or equal to 0, and y is greater than or equal to 0.
Thank you in advance for your assistance!
Christina
Click here to see answer by solver91311(24713)

Question 806768: How do I graph the inequality, subject to the non-negative restrictions on the following problem:
40x-55y > 0, x>=0 and y >= 0 (this means x and y are both greater than or equal to zero)
Thank you in advance for your assistance!
Christina
Click here to see answer by solver91311(24713)

Question 806781: Solve each system by addition, if possible
Having trouble understanding this.
x + y = 1
x - y = 7
Do I add it together like this:
x + y = 1
x - y = 7
--------------
2x = 8
Then, should I divide it like this:
8/2x = 4
Click here to see answer by solver91311(24713)

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