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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 302944: How do I solve?
4x + 4y = 16
-2x + 5y = 9
Click here to see answer by Alan3354(69443)

Question 303029: Amy paid $83.49 for a pair of running shoes during a 30%-off sale. What was the regular price?
Click here to see answer by checkley77(12844)

Question 303047: what is the answers to -12x+6y=24
Click here to see answer by TX911(36)

Question 303263: Please help me to solve this equation:
x+y+z=2
-x+2y+3z=2
2x-3y-z=1
x-y-z=0
Click here to see answer by ankor@dixie-net.com(22740)

Question 303286: 3x-2y=13
5x+7y=22
Click here to see answer by jim_thompson5910(35256)

Question 303264: Please help me solve this equation
-2x+3y-5z+w=0
4x-6y+10z-2w=0
Click here to see answer by checkley77(12844)

Question 303251: Please help me solve this equation: show me how to calculate
x^1+x^2+x^3=0
2x^1-x^2-x^3=-3
x^1-x^2+x^3=0
Answer= x^-1
x^0
x^1
Click here to see answer by Alan3354(69443)

Question 303541: What are all the names of the different types of methods that you can use to solve a Linear Equation? (probably spelled it wrong)
Click here to see answer by ruvimsavin(2)

Question 303541: What are all the names of the different types of methods that you can use to solve a Linear Equation? (probably spelled it wrong)
Click here to see answer by richwmiller(17219)

Question 303546: solve the systm of linear equation by substitution
3x+2y=6
y=2x+10
Click here to see answer by stanbon(75887)

Question 303513: In a family there are two cars. The sum of the average miles per gallon obtained by the two cars in a particular week is 65. The first car has consumed 25 gallons during that week, and the second has consumed 35 gallons, for a total of 2025 miles driven by the two cars combined. What was the average gas mileage obtained by each of the two cars in that week?
Click here to see answer by mananth(16946)

Question 303877: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60mph and train B is traveling at 80mph. Train A passes a station at 3:25pm, train B passes the same station at 3:40pm. At what time will Train B catch up to Train A
Click here to see answer by checkley77(12844)

Question 303915: Amy paid $74.87 for something it was on sale at 15% off. What is the regular price of the item?
Click here to see answer by JBarnum(2146)

Question 304038: When you have an equation such as x + 1/2 = -3/2 how do you know which number to subtract or add from the left side and vice versa on the right side? Is there an easy way to determine it?
Click here to see answer by edjones(8007)

Question 304350: Can you mutiply unlike terms?
Click here to see answer by Alan3354(69443)

Question 304467: 8y(8y - 8) + 58y

Click here to see answer by mananth(16946)

Question 304564: Alex buys 36 cans of vegetables. He pays 80 cents for tomatoes and 40 cents for a can of corn, for a total cost of $20.80. How many cans of tomatoes did he buy?
Click here to see answer by scott8148(6628)

Question 304724: Rewrite the linear equations as a function of x.
-2x+3y=11
Click here to see answer by Theo(13342)

Question 304722: Rewrite the linear equation as a function of x
4x+5y=20
Click here to see answer by Alan3354(69443)

Question 304660: Solve the following by substitution: x + y = 0, 3x + 3y = 4. Are these equations independent, dependent or inconsistent?
What are the slopes of the above lines ?
Change the second equation in problem 1 to 3x + 2y = 4. Solve by substitution.

Click here to see answer by Alan3354(69443)

Question 304828: A baseball team played 150 games and won 32 more than it lost. How many did it lose?
Click here to see answer by themathtutor2009(81)

Question 305127: how can i solve this substitution methods:
3x-2y=-7
y=2x+6
Click here to see answer by Alan3354(69443)

Question 305137: please help me solve this equiation:
sume methods
5x+4y=6
2x=-5y-1
thanks
Click here to see answer by checkley77(12844)

Question 305134: solve the following: substitution method 3x-2y=-7 y=2x+6
Click here to see answer by checkley77(12844)

Question 305193: can you help me solve 2 & 3 variable linear equations using the elimination or the subsitution method?

Click here to see answer by richwmiller(17219)

Question 305168: m-5/
Click here to see answer by richwmiller(17219)

Question 306031: x+y=7
x-y=9

Click here to see answer by themathtutor2009(81)

Question 306059: 3x+5y=-11
x-2y=11

Click here to see answer by themathtutor2009(81)

Question 306258: The equations S = 5000 + 200x and
D = 9500 - 100x express the supply S and the
demand D, respectively, for a popular compact disc brand
in terms of its price x (in dollars).
a) Graph the equations on the same coordinate system.
b) What happens to the supply as the price increases?
c) What happens to the demand as the price increases?
d) The price at which supply and demand are equal is
called the equilibrium price.What is the equilibrium
price?
Click here to see answer by checkley77(12844)

Question 306390: 31x=62(x+3)
My work: 31x=62x+186
divide 31 from both sides
x=2x+6
divide 2 from both sides
1/2x=6
x=3
My online homework told me it was wrong but I don't understand what I did wrong.
Click here to see answer by Fombitz(32388)

Question 306441: x+ 8y = 5
x = 4-8y
Click here to see answer by richwmiller(17219)

Question 306509: A chemist has one solution that is 40% alcohol and another that is 55% alcohol. How much of each must she use to make 15 liters of solution that is 50% alcohol?
Click here to see answer by dabanfield(803)

Question 307029: Please help me solve this question
( 3x +9 =108

my email is jscott659@yahoo.com
Click here to see answer by jim_thompson5910(35256)

Question 307170: Find the solution to each system by the substitution method. Check your answer
10x+3y=8
2x+ y=2
Click here to see answer by Fombitz(32388)

Question 307362: I am REALLY struggling with this one.
You mix your own feed for the puppies. The feed mix consists of ground meat and ground grains. You mix a total of 100 pounds at a time. The ground meat is 45% protein and the ground grains is 18% protein, find the amount of ground meat and ground grains required for a 100 pound feed mix at the optimum protein level of 28%. Solve this system using the Elimination Method. Round solutions to nearest whole number. The system of equations that I thought should be used is: m + g = 100 and 0.45m + 0.18g = 0.28 but I cannot come up with a sensible solution. Please help!
Click here to see answer by ankor@dixie-net.com(22740)

Question 307509: Perform an operation on the given system that eliminates the indicated variable and solve for the unknown variables.
x-4y+z=3
y-3z=10
3y-8z=24
Click here to see answer by rapaljer(4671)

Question 307569: The position of an object moing in a straight line is given by s=2t^2-3t, where s is in meters and t is the time in seconds the object has been in motion. how long (to the nearest tenth) will it take the object to move 19 meters?
i think my answer is 3.7 seconds.
Click here to see answer by Earlsdon(6294)

Question 307657: Al sold a total of 300 Pizzas and Gyros. Pizzas were sold at $8 each and Gyros for $6. Total sales came to $2,000. How many of each was sold?
Click here to see answer by checkley77(12844)

Question 307885: √36x^3
Click here to see answer by mananth(16946)

Question 308004: write an equation with points of (0,4) and (7,-4) (I'm not sure where this line of question should go...)
Click here to see answer by JBarnum(2146)

Question 308200: Alex has a jar containing 80 coins, all of which are either quarters or nickels. The total value of the coins is $14.95.
A. Write a system of equations for the problem.
B. How many of each type of coin does he have?
Click here to see answer by nyc_function(2741)

Question 308558: (3a^8)(a^6)
Click here to see answer by Alan3354(69443)

Question 308558: (3a^8)(a^6)
Click here to see answer by rapaljer(4671)

Question 308751: y= x-4
y= -x+2 how to solve by substition
Click here to see answer by rapaljer(4671)

Question 308817:
how do I solve by elimination? I can do substitution.
Click here to see answer by ichudov(507)

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