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

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

Question 337616: solve using the substitution method y = 2x - 5, 3x + y = 15
Click here to see answer by Fombitz(13828)

Question 337175: 3x + 4y = 720; x =?, y =?
Click here to see answer by Fombitz(13828)

Question 337913: 9+4n=-59
Click here to see answer by rfer(12657)

Question 337920: find the area of the trash dump formed by the intersection of the lines x=-2, y=3x-7, 2x+y=2
Click here to see answer by Fombitz(13828)

Question 339256: factor completely.
5x^3+15x^2-20x
Click here to see answer by stanbon(57342)

Question 339257: factor completely.
8t2+18t+9
Click here to see answer by scott8148(6628)

Question 339258: find the largest common factor.
y(y+7)-2(y+7)
Click here to see answer by stanbon(57342)

Question 339260: please factor compeletly.
x^2+24x+144
Click here to see answer by stanbon(57342)

Question 339262: please solve using the principle of zero products.
2x^2+x=42+9x
Click here to see answer by nerdybill(6958)

Question 339820: please help me work this out i'm really having a hard time figuring this out.using substitution
2x+y=3
y=5x-11
Click here to see answer by Fombitz(13828)

Question 339823: need help!please solve each system
3x+y+z=0
2x-y+z=0
2x+y+z=0
Click here to see answer by Fombitz(13828)

Question 339823: need help!please solve each system
3x+y+z=0
2x-y+z=0
2x+y+z=0
Click here to see answer by stanbon(57342)

Question 339882: W^2=-225
Click here to see answer by stanbon(57342)

Question 339885: I am not sure how to set up this problem: The average monthly high temperature (in degrees Fahrenheit) in Cincinnati for the first 10 months of the year can be modeled by the equation where x = 1 corresponding to January. What month is the high temperature most likely to be close to 75 degrees?
Thank you so much (I am encouraged to use a TI84 graphing calculator, but that is new to me so I am having trouble with that as well.)
Beth
Click here to see answer by solver91311(16885)

Question 341349: Trying to help my daughter solve the following..... 7.5 (a - 3) and it says to use the distributive property (?) and expand like terms when possible. I havent done math in forEVER..'dist.prop' and 'like terms' are mysteries to me!
Click here to see answer by Theo(3463)

Question 341470: Solve the equation: 14x + 3x - 40 = 11

Click here to see answer by rfer(12657)

Question 341556: for equation y=2x-4 select order of pairs that are solutions:
0,-4
-1,-6
2,3
-4,0
Click here to see answer by Fombitz(13828)

Question 341698: y=x^2+4x-3
y=5x+3
Click here to see answer by Fombitz(13828)

Question 341913: how do you solve this problem?
2x+(4y)+(12x)+9y

Click here to see answer by stanbon(57342)

Question 341915: how do i solve this problem
34+8/(-4)=?
do i start by adding the 34 and the 8 or do i start by dividing the 8 into the
-4?
Click here to see answer by stanbon(57342)

Question 341916: can you help me evaluate the expression or let me know if this is correct
a=6 and b=1
5(a+4b) + 3(2a-7b)
30+20+36-21=65
is that correct?
Click here to see answer by Alan3354(30993)

Question 342265: solve each system of equations 2x-y=12
x+3y=13

Click here to see answer by Fombitz(13828)

Question 342529: Solve the nonlinear system of equations. Solve by using elimination or substitution methods.
x^+y^=5
x+y=3
Click here to see answer by Alan3354(30993)

Question 342986: Please solve algebraically:
2x^2 + 2y^2 + 4x = 6y
x^2 + y^2 + 2x - 3y = 1
For the first equation, I was able to divide everything by 2 and complete the square. After, I completed the square I factored it and got the answer:
( x+1)^2 + (y-3)^2 = 0
I did not know what to do after that though, it would be easy to solve the with a graph, but I cannot figure out how to solve both equations. Any help would be greatly appreciated, thanks so much!

Click here to see answer by jim_thompson5910(28595)

Question 343249: Please help me solve this problem: -1/2 - (-5/8) =
Click here to see answer by mananth(12270)

Question 343156: solve each equation and check.
-2/9=5x/6-1/3
Click here to see answer by haileytucki(390)

Question 343350: 6h - 7 = 17 Can you answer and show steps?
Click here to see answer by mananth(12270)

Question 342987: Please solve algebraically:

I do not know really where to start on this one, I would think that you would complete the square for the second equation to begin. However, after that I do not know what to do with the first equation.
Any help would be greatly appreciated as this seems difficult to me, thank you so so much!

Click here to see answer by Sphynx pinastri(7)

Question 343773: I need help with this word problem. Sunshine truck rentals rents a truck at a daily rate of $57.99 plus .48 per mile. City rentals rents the same size truck for $58.95 plus .46 per mile. For what mileage is cost the same?
Click here to see answer by jim_thompson5910(28595)

Question 343768: Solve the following system of equations by substitution.
5x+y=39 and y=21-3x.
Click here to see answer by rfer(12657)

Question 344522: An equation of the form 4x+6y-2z=32 . Find the difference between x intercept and z intercept?
Click here to see answer by Fombitz(13828)

Question 344522: An equation of the form 4x+6y-2z=32 . Find the difference between x intercept and z intercept?
Click here to see answer by stanbon(57342)

Question 344677: the average, or mean D of three exam grades x, m and n is given by the formula
D= x+m+n
3
(a) solve the formula for n
(b) use the formula in part (a) to solve the problem.
On your first two exams, your grades are 84% and 87%. x= 84 and m=87%. what must you get on the third exam to have an average of 91%?
please explain how to determine the answer
Click here to see answer by stanbon(57342)

Question 344782: 3x+2y=47
Click here to see answer by user_dude2008(1861)

Question 344789: 1.) 4u=37+4u
2.) 5x+8=7x+8
3.) 2x-5=3x+4
Click here to see answer by user_dude2008(1861)

Question 345504: Simplify. You may use the properties to help: (3x)(4y)(2z)
Click here to see answer by Fombitz(13828)

Question 345652: solve each formula for the given variable.
y=mx+b; solve for x
Click here to see answer by Fombitz(13828)

Question 346350: how would you solve a system of equations algebracially that is 5x+2y=2 and x-7y=-81?
Click here to see answer by checkley77(12569)

Question 346409: what is the algebraic expression for the word phrase: 3 times the sum of b and f
Click here to see answer by fractalier(2101)

Question 346645: Write a system of two equations using x and y to represent the following problem. A chemist is mixing two solutions together.
The chemist wants 100 gallons when complete. He is mixing a 24% solution with a 50% solution to get a 36% solution. How many gallons of each will he use?

Click here to see answer by nerdybill(6958)

Question 346658: Find the solution of this system of eqautions. seperate the x- and y- values with a comma.
x-2y=-29
x-y=-11
i really need help with this, i have stated what needs to be done with the equation at the top.
Click here to see answer by Alan3354(30993)

Question 346657: Find the solution of this system of eqautions. seperate the x- and y- values with a comma.
x-2y=-29
x-y=-11
i really need help with this, i have stated what needs to be done with the equation at the top.
Click here to see answer by Alan3354(30993)

Question 346647: The sides of a triangle have measures of x, x, and y, and the perimeter of the triangle is 46. The measure y is 4 centimeters longer than the measure x. Write two equations which represent the two sentences.
Click here to see answer by solver91311(16885)

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