Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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Question 466167: solve the following system using Gauss-Jordan elimination
-8x1 -4x2 = -32
2x1 + x2 =8

Click here to see answer by robertb(4012)

Question 466226: Solve the system by the elimination method.
5x+5y= -13
7x-2y=11
Click here to see answer by Love math(28)

Question 466224: Solve by substitution
8m-n+70
m-2n=13
Click here to see answer by Love math(28)

Question 466168: solve the system using Gauss- Jordan elimination
-6x1 - 3x2 = 21
2x1 + x2 =7
Click here to see answer by robertb(4012)

Question 465761: what is the x and y intercept for x-y=3
Click here to see answer by robertb(4012)

Question 467084: Solve the following system for real number solutions using elimination or substitution. I am just trying to check my work. Here is what I got:
x^2+y^2=9
2x-y=3
Answer:
using substitution y=2x-3
x^2+(2x-3)^2=9
x^2+4x^2-12x+9=9
5x^2-12x=0
x(5x-12)=0
x=0 and x=12/5
Therefore:
(0,-3) and (12/5,9/5)
But I feel like I am missing something. When I graph on my calculator there is only one intersection but both answers seem to work. Plus, I am concerned about the ^2, did I capture all possible real number answers?
Thanks!
Click here to see answer by Alan3354(30993)

Question 465758: .5(2-x) = 1.5x+7
please show your work.....thanks
Click here to see answer by gwendolyn(128)

Question 467457: Is this a non linear equation y=3x-2 if so I am not sure how to give 2 inputs. Can someone help me?
Click here to see answer by stanbon(57347)

Question 468136: 3(x-1)+5=15x+7-4-4(3x+1)+3
Click here to see answer by rfer(12660)

Question 468135: 2x+7-3x=-x+12
Click here to see answer by rfer(12660)

Question 468406: I need to graph a nonlinear equation
y= 2/3x - 1
Click here to see answer by jorel1380(2518)

Question 468875: plaase help me solve this system equations x+2y+2xy=3 and 3x+4y-2xy=4
Click here to see answer by Edwin McCravy(8909)

Question 470832: Solve the system by the method of substitution.
{x^2+y^2=25
{3x-4y=0
a. no real solution
b.(3,4),(3,-4)
c.(4,3),(-4,-3)
d.(4,3)
e.(4,3)(-4,3),(-4,-3),(4,-3)
Click here to see answer by hinaahsan(5)

Question 470828: Solve the system by the method of elimination.
{-0.04x+0.04y=0.03
{-0.02x+0.04y=0.2
a.(5,23/4)
b.inconsistent
c.(9,19/2)
d.(a,3+4a/4) (dependent)
e.(17/2,37/4)
Click here to see answer by Tatiana_Stebko(1326)

Question 470825: Solve each system of equations by the elimination method.
-5x+4y=14
-6x+8y=14
a.(7/8,7/2)
b.(-7/8,-7/2)
c.(-7/32,-7/8)
d.(-77/8,21/2)
Click here to see answer by hinaahsan(5)

Question 470823: Solve the system by the method of substitution.
{-1/9x-1/3y=1
{-1/6x-1/4y=1
a.(-3,-2)
b.(-2,-3)
c.(3,2)
d.(-3,2)
e.(2,-3)
Click here to see answer by Edwin McCravy(8909)

Question 470830: Solve the system of equations below:
7x-8y+6z=0
-3x-2y-z=0
-7x-y-z=0
a.(-5c,8c,-8c)
b.(0,0,0)
c.(-5,-8,8)
d.(-8,8,-5)
e.(-8c,8c,-5c)
Click here to see answer by Alan3354(30993)

Question 471031: Solve this using the substition method:
-3x+6y=-3
-6x+4y=-10
Click here to see answer by jorel1380(2518)

Question 471819: Can you please Help"
Divide and Check: 4x^4y-8x^6y^2+12x^8y^6/4x^4y
Click here to see answer by stanbon(57347)

Question 472014: please help me solve this substitution by elimination problem
5x+15y=30
x+3y=6

Click here to see answer by LVSMath(2)

Question 472442: I would like help on what steps do I have to take to solve: (2/3)x-5=x-3. I am not sure where to begin.
Click here to see answer by Alan3354(30993)

Question 473312: 3x+y=9
x=3, y=0
Click here to see answer by rfer(12660)

Question 473333: In a 3 drawer chest, sadie has 25% of her sweaters in drawer A, 30% in drawer B and the rest in drawer C. What is the smallest number of sweaters she could have in drawer C?
Click here to see answer by edjones(7569)

Question 473392: The total number of reds and blues was one greater than the number of greens. The sum of three times the number of reds and twice the number of blues exceeded the number of greens by nine. How many of each color were there if three times the number of blues exceeded the number of greens by two?
Click here to see answer by stanbon(57347)

Question 473391: There are 27 nickels, dimes, and quarters in the drawer with a value of $3.00. How many coins of each type are there if there are three times as many nickels as there are dimes? Write and solve a system of equations.
Click here to see answer by stanbon(57347)

Question 473296: Solve the system
2x-3y+z=13
x+2y+3z=2
3x-y+z=12
Click here to see answer by Edwin McCravy(8909)

Question 473389: Robert has a box of nickels, dimes and quarters. There are a total of 28 coins in the box. The total value of the coins is $4.95 and there are five more nickels than dimes. How many of each type of coin does Robert have?
Click here to see answer by stanbon(57347)

Question 473610: Solve the system of equations using any method.
n + d + q = 27
5n +10d +25q = 300
n - 3d + 0q = 0

Click here to see answer by Alan3354(30993)

Question 473612: Solve the system of equations using any method.
x-3y-z=7
2x+y-2z=0
x-y+z=1
Click here to see answer by Alan3354(30993)

Question 473611: Solve the system of equations using any method.
n + d + q = 28
5n +10d +25q = 495
n - d + 0 = 5

Click here to see answer by Alan3354(30993)

Question 473609: Solve the system of equations using any method.
r + b - g = 1
3r +2b - g = 9
0r + 3b - g = 2
Click here to see answer by Alan3354(30993)

Question 473607: Solve the system of equations using either elimination or substitution
2x-3y+z=13
x+2y+3z=2
3x-y+z=12
Click here to see answer by Alan3354(30993)

Question 473862: solving systems of equations
solve the system of equation

{ x+y=7
x-y=13

i know the answer is (10, -3)
my question is how? can someone show me a step by step on how to do this?
Click here to see answer by Alan3354(30993)

Question 474061: Which of the following constraints are not linear or cannot be included as a constraint in a linear programming problem?
a. 2x1 + x2 – 3x > 50
b. 2 x1 + vx2 > 60
c. 3x2 <45

Click here to see answer by Tatiana_Stebko(1326)

Question 474605: (a/b-b/a)(a- a^2/a+b)
Click here to see answer by Tatiana_Stebko(1326)

Question 474788: Find all solutions of the system
y+x^2=4x
y+4x=16
Click here to see answer by mananth(12270)

Question 475588: The difference of two numbers is 2 and the sum of thier squares is 52
Click here to see answer by edjones(7569)

Question 475893: Solve the system
2/3x-2/5y=2
0.03x+0.04y=0.67
Click here to see answer by MathLover1(6634)

Question 475916: There were 35 nickels,dimes, and silver dollars in the pile, and their value was $12.25. How many coins of each kind were there if there were twice as many silver dollars as nickels?
Click here to see answer by stanbon(57347)

Question 475967: Solve the system
x-3y-z=7
2x+y-2z=0
x-y+z=1
Click here to see answer by Maths68(1474)

Question 476501: As a college graduation gift, your Aunt plans to buy shares of two stocks for you. The first costs $23 and she pays $1.40 in dividends per share. The second costs $32 and pays $1.20 per share in dividends. If she has $10,100 to spend and wants you to earn $540 individends, how many of each stock should she buy?
Click here to see answer by mananth(12270)

Question 476437: find a cubic equation with integra; coefficients that has -3 and 2i as roots
Click here to see answer by ankor@dixie-net.com(15652)

Question 476571: Solve this system of equations.
x+y+z= 11
2x+5y+2z= 31
-x+7y-3z= 1
Click here to see answer by Maths68(1474)

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