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

Tutors Answer Your Questions about Systems-of-equations (FREE)

Question 571157: A two- digit is such that the sum of the digits is 11. When the number with the same digits reversed is subtracted from this number, the difference is 9. What is the number?
Click here to see answer by lwsshak3(2915)

Question 570855: What is the solution to the following system of equations?
-8x - 6y = 52
8x + 0y = -16
Click here to see answer by Alan3354(21551)

Question 570846: Which of these images represents the following system of equations being solved graphically?
6x – 6y = -48
-10x + 4y = 92

Click here to see answer by mananth(10541)

Question 570847: Which of these images represents the following system of equations being solved graphically?
6x – 6y = -48

Click here to see answer by mananth(10541)

Question 570251: Please help me answer this question I am stuck and cannot get past it. Thank you for any help you can give me :)
explain how to solve a quadratic equation by completing the square. Demonstrate the process with your own example. Please explain step by step how you worked through your example.

Click here to see answer by ankor@dixie-net.com(12684)

Question 570131: I have fifteen coins. Some are valued at 5 cents and others at 20 cents. Their total value is $1.65. How many 5-cents coins and 20-cents coins do I have?
Click here to see answer by Maths68(1140)

Question 568969: I understand how to graph when given an equation. I do not understand the reverse. For instance, what is the equation of a line with an intercept of (0,3) and a slope of -3. So x is 0 and y is 3. I am assuming the slope would go down to the left along the x axis but I still do not know how to go to the equation. Thanks
Click here to see answer by Theo(2967)

Question 568845: Hi my name is Andrew, and I need help with the following 5 problems my help me with 15 but the last five are giving us trouble.
Modeling with Systems of equations Directions: for the following identify what the variables represent, write a system of equations that Models the problem and solve the system and then write a sentence interpreting your answer.
1. Mr. King is 4 times as old as his daughter. Four years ago he was 6 times as old as his daughter was then. Find each of their ages.

Click here to see answer by richard1234(4789)

Question 568732: one third the sum of two numbers is 12 and half the difference is 14. what are the numbers?
using substitution.

Click here to see answer by solver91311(12118)

Question 568004: When would you recommend solving an equation algebraically? when would you advise use of a table, graph, or computer algebra system?
Click here to see answer by richard1234(4789)

Question 566012: xy=3
5x-6y=6
by substitution method
Click here to see answer by mananth(10541)

Question 565619: Use the system to answer the question
{x+3y=6}
{4x + 6y = -6}
Note: The problem above are both under the { symbol, the first one is over the second one.
These are the choices for the problem
(-9, 5)
(-3, 3)
(6, 3)
(12, -2)
I'm not sure how I got it wrong. The correct answer was the first one. (I have the answers, so I can redo the ones I missed, but I have to show my work, and I don't know how to get that answer.) Could you look over my work that I did and explain how to get the solution? Thanks, much appreciated.
My Work:
{x+3y=6}
{4x + 6y = -6}
1. I multiply the first equation by -4 so I can eliminate the 4x
(-4) {x+3y=6} + {-4x -12y = -24}
2. I eliminate the 4x from the problem
{-4x - 12y = -24}
{4x + 6y = -6}
(-4 and 4 crosses out so I'm left with"
0x - 12y = -24
0x + 6y = -6
3. Then I solve:
-12 and a + 6 gets a -6. -24 and -6 gets -18
so I get 0x -6y = -18
From there I am stuck. I'm not sure if I use substitution or elimination or what.
Thanks for your help!

Click here to see answer by stanbon(48510)

Question 565099: y=4x-2
y=-2x+4
Click here to see answer by Leaf W.(83)

Question 565064: Please help me solve this equation by elimination:

Click here to see answer by Alan3354(21551)

Question 564241: x+2y+3z=6
y+2z=0
z=2
Click here to see answer by stanbon(48510)

Question 564012: dont know how to do this
(x+5y)^2

Click here to see answer by jerryguo41(106)

Question 562756: susie is going to purchase a new freezer. one brand costs $1800 and estimates $60 per month to operate. a more expensive brand costs $2600, but only costs $40 per month to operate.
a) write an equation representing the cost of each freezer in terms of months owned.
Click here to see answer by issacodegard(60)

Question 562214: a 4% salt solution is mixed with a 16% salt solution. How many milliliters of each solution are needed to obtain 600 milliliters of a 10% salt solution?
Click here to see answer by Alan3354(21551)

Question 561975: 3*4/6*2
**Please note that I am using the asterisk sign to denote the exponent. I was not sure how else to type this.
what rule would I use and why?
Click here to see answer by josmiceli(6777)

Question 561606: How do I work this system of equation with three variables? I don't know where to start?
Click here to see answer by ankor@dixie-net.com(12684)

Question 561134: 3x-11=y
x-3y=9
Click here to see answer by mananth(10541)

Question 559401: a-2b=2
a+b=2(b+3)
solve the system by linear combination method
Click here to see answer by mananth(10541)

Question 558965: I am trying to figure out how to solve the system:
2x - y = -8
y + 3z = 22
x z = -8
This is what I have so far in eliminating the y variable from the first two equations. 2x - y = -8
y +3 z = 22
That leaves 2x +3z = 14
I am stuck on how to eliminate x from the third equation since xz are together. Can you please help guide me to get the correct solution. Thanks.
Click here to see answer by stanbon(48510)

Question 558919: okay so i am having problems with my online math homework i just want this double checked.
6-5(8-(2y-4))original equation
6-5(8-2y-4)
6-5(4-2y)
6-20+10y
10y-14 answer i got
Click here to see answer by Theo(2967)

Question 558512: x+3y=9
x+y=1 combine llike terms 4y=9
divide by 4 y=2.25
substitute x+2.25=1
i think that's wrong help please

Click here to see answer by scott8148(5879)

Question 557810: how can i get all the possible solutions of a system of equation like

A+B+C+D=120
ABCD= 2000
is there a general way to get the possibilities?
if there is any website or software that can be used then kindly mention it.

Click here to see answer by Theo(2967)

Question 557751: How can I translate this to an equation? h$100 bills and t $20 bills total $400
I do not understand and then I have to graph this and use the graph to determine three different combinations of this.
Click here to see answer by mananth(10541)

Question 557734: (24x^3-58x^2-56x-10) / (8x+2)
Click here to see answer by rfer(10417)

Question 557651: A two-digit number is eight times the sim of its digits. When the number is added to the number obtained by reversing the digits, the sum is 99. Find the original number.
(I tried 10x+y=8(x+y), 10x+y+10y+x=99) It didn't work though...
Thanks!
Click here to see answer by KMST(578)

Question 556910: -3(h-6) = 5(2h+3)
Click here to see answer by Maths68(1140)

Question 556071: In one evening, a pizza parlor collected 700 coins, for a total of $145. If the coins are all dimes and quarters, how many of each kind are there?
Click here to see answer by josmiceli(6777)

Question 555993: Two numbers sum to 32. Six times the smaller number is equal to twice the larger. What are the numbers?
Click here to see answer by TutorDelphia(189)

Question 555937: Solve using the substitution method. If the system has no solution or an infinite number of solutions, state this.
-x-3y=-20
5x+3y=40
Click here to see answer by saifoo.khan(153)

Question 555940: Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this.
4x+3y=-45.5
-5x+8y=-43
Click here to see answer by saifoo.khan(153)

Question 555936: How do you find the slope of a line that is not linear?
Click here to see answer by KMST(578)

Question 555662: y=-x+10
y=x+2
Click here to see answer by Maths68(1140)

Question 554827: system of Equations and inequalities
There are 2 triangles which I can't draw, imagine them between the letters and numbers. Could someone please help with this? Could you show all work and explain steps for me so I understand.
The triangle on the left has a perimeter of 14. The triangle on the right has a perimeter of 21. What are x and y?

1st triangle has a y on each side and x at bottom the other triangle has 5/4y on each side and 3x at the bottom.

Click here to see answer by ankor@dixie-net.com(12684)

Question 554545: solve the system
3x+3y=3
-3x-2z=-11
y+z=-1
Click here to see answer by Edwin McCravy(6931)

Question 554262: System of Equations:
A pet store currently has a total of 45 cats and dogs. There are 7 more cats than dogs. Find the number of cats and dogs in the store.
Click here to see answer by TutorDelphia(189)

Question 553920: 3x+7y=33
-7x+y=27
Solve using the substitution method.
Click here to see answer by rfer(10417)

Question 553631: graph system of equations and describe it as consistent and independent, consistent or dependent, or inconsistent.
y=-x-2
x+y=-4
Click here to see answer by mananth(10541)

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