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

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> Questions on Algebra: Systems of Linear Equations answered by real tutors!      Log On

 Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo . Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Linear Solvers Practice Answers archive Word Problems Lessons In depth

 Question 134457: solve the linear equation by using the elimination method. x + 2y=2 1/2x + 1/3y=1 Click here to see answer by vleith(2825)
 Question 134457: solve the linear equation by using the elimination method. x + 2y=2 1/2x + 1/3y=1 Click here to see answer by jim_thompson5910(28476)

 Question 134461: solve by using elimination method x+2y=4 1/2x + 1/3y=1 Click here to see answer by jim_thompson5910(28476)

 Question 134625: find an equation of the circle passing through the points (1,3),(-2,6),(4,2) Click here to see answer by solver91311(16868)

 Question 134719: This is the equation 4x+3Y=12. The instructor picked the three coordinates a. X is 0, Y is 4 - I understand the equation for this b. X is 3 and Y is ) Do not understand how the equation was solved with the Y being 0? c. X is 4 and Y is -1.33 or -4/3 . Again how was the equation solved to get this coordinate Thank you Click here to see answer by vleith(2825)
 Question 134719: This is the equation 4x+3Y=12. The instructor picked the three coordinates a. X is 0, Y is 4 - I understand the equation for this b. X is 3 and Y is ) Do not understand how the equation was solved with the Y being 0? c. X is 4 and Y is -1.33 or -4/3 . Again how was the equation solved to get this coordinate Thank you Click here to see answer by josmiceli(9652)

 Question 134806: Can you help me solve for x mx(squared)=5x Click here to see answer by solver91311(16868)

 Question 134930: Are all linear equation functions? Is there an instance when a linear equation is not a function? Can you give an example of and nonlinear equation? Click here to see answer by vleith(2825)

 Question 134936: Could you please help with the following problem. It needs to be solved using the elimination method. The answer that I calculated is not what the book shows. Thanks. x^2+y^2=16 4x^2-9y^2=36 The answer must be in square root format (different form what the book asks for) Click here to see answer by vleith(2825)

 Question 135052: How do I translate to a system of equations and solve? A collection of nickels and dimes is worth \$16.05. There are 218 coins in all. How many are nickels and how many are dimes? Click here to see answer by vleith(2825)

 Question 135066: How do I translate to a system of equations and solve? Corrin is 23 years older than Beth. In 9 years, Corrin will be twice as old as Beth. How old are they now? Click here to see answer by checkley77(12569)

 Question 135340: I have three questions if that is ok. Solve for x: 5x - 12 = 4x + 5 Solve for x: -3(4x+3)-2 = 7 -2x + 3 Solve for x: (x + 3)/4 - 3/2 = (x + 4)/8 thank you in advance for you help Click here to see answer by checkley77(12569)

 Question 135392: Solving Systems of Linear Equations by the Substitution Method. I am having a difficult time understanding how to do this. I was hoping someone could help me. The problem is: 2x+3y=7 x=2 So would it be 2(2)+3(y)=7? How do I get y? 4+3y=7 I would think that y would equal 1 since 3*1=3+4 would equal 7 However, I am not sure if this is the way the problem needs to be worked out. Will you please help me understand this? Thank you! Click here to see answer by stanbon(57224)

 Question 135393: Solving Systems of Linear Equations by the Substitution Method. I am having a difficult time understanding how to do this. I was hoping someone could help me. The problem is: y=x-3 x+y=5 x+x-3=5 if I am reading the problem right. But I am not sure where to go after that. Will you please help me understand this? Thank you! Click here to see answer by stanbon(57224)

 Question 135395: Solving Systems of Linear Equations by the Substitution Method. I am having a difficult time understanding how to do this. I was hoping someone could help me. The problem is: y=4-3x 3x+y=5 But I am not sure where to go after that. Will you please help me understand this? Thank you! Click here to see answer by stanbon(57224)

 Question 135394: Solving Systems of Linear Equations by the Substitution Method. I am having a difficult time understanding how to do this. I was hoping someone could help me. The problem is: x=y-2 x+3y=2 But I am not sure where to go after that. Will you please help me understand this? Thank you! Click here to see answer by stanbon(57224)

 Question 135751: How would I solve this Equation the fractions confuse me ? : 1)x/3 - 7/8 = 2/5(x + 15/4) Click here to see answer by ptaylor(2048)

 Question 135833: How do you solve this system of equations by graphing? y=-3x-2 y=x-2 Please give me an answer as soon as possible the assignment is do tomorrow 4/9/08. Thank You for all your help Taylor Click here to see answer by ankor@dixie-net.com(15625)

 Question 136114: Linear functions y=3/4x + 2, find x if y=2/3 Click here to see answer by ijeoma(3)

 Question 136303: I have two sets of points; (42,20) and (52,10). I need an equation in the form of y = mx + b. The answer I got was y = 1x - 22. Is this correct? Click here to see answer by scott8148(6628)

 Question 136365: Graph the equations; calculate the slope, x-intercept, and y-intercept. 3x = -2 This is what I got so far. 3x/3 = -2/3 x = 0.667 I'm not sure how to graph this; find the slope and the x & y intercepts. Thanks! Click here to see answer by checkley77(12569)

 Question 136364: Confused, not sure how to find the solution. Find the area of a rectangle if three of its corners are (-0.1,-3.4), (-7.9,-3.4), and (-0.1,6.8). Thanks! Click here to see answer by scott8148(6628)

 Question 136567: How do I go about solving this? The answer is yes but I don't know why. Please help. Thank You very much:) Determine whether the given point is in the solution set to the given system. (-3, -1, 4) 2x-2y-3z=-16 4x-3y+3z=3 x+y-5z=-24 Click here to see answer by stanbon(57224)

 Question 136872: Two foods, I and II contain the following percentages of carbohydrates, protein, and fat: Food Carbohydrates Protein Fat I 40% 50% 6% II 60% 20% 4% Food I costs 3c. per gram, and food II costs 4c per gram. Determine the amount of each that should be served to produce at leat 10 grams of carbohydrates, 7.5 grams of protein, and 1.2 grams of fat, if cost is to be minimized. Let x=amount of food I Y=amount of food II minimize z=0.03x + 0.04y, subject to 0.4x+0.6y=10 0.5x +0.2y=7.5 0.06x+0.04y=12 x=0, y=0 How should I draw this and add this formula in excel? Click here to see answer by stanbon(57224)

 Question 136893: help me solve please: y+3x=9 i dont get how to solve/get for x & y. Click here to see answer by stanbon(57224)

 Question 137256: Could someone help me understand how to solve the problem posted...especially how the variable or unknown will be removed from the denominator. Any help would be greatly appreciated. Question: Solve the following system: 5/3a - 7 = -2/5b 7/6a - 1/10b = 3 Click here to see answer by stanbon(57224)

 Question 137275: Could you please solve this system by the addition method, indicating if the system is independent, inconsistent, or dependent. I really appreciate your help. Thank you very much. -3x + y = 3 2x - 3y = 5 Click here to see answer by oscargut(891)

 Question 137269: Could you please solve by using sustitution method. Please show details. Thank you. x - y = 3 3x - 2y = 3 Click here to see answer by MORUPHOSUOLALE(24)

 Question 137270: Could you please solve by using sustitution method. Please show details. Thank you. x - y = 3 x=3+y Now substitute x value of 3+y into the below equation 3x - 2y = 3 3(3+y)-2y=3 9+3y-2y=3 9+y=3 subtract 9 to each side y=3-9 y=-6 x-y=3 x=3+y x=3+(-6) x=-3 Click here to see answer by tns_tutor5000(9)

 Question 137267: write the equation for: on a canoe trip, Rita paddled upstream (against the current) at an average speed of 2 mi/h relative to the riverbank. On the return trip downstream (with the current), her average speed was 3 mi/h. Find Rita's paddling speed in still water and the speed of the river's current. Click here to see answer by ankor@dixie-net.com(15625)

 Question 137276: Please help and solve this system by the addition method and indicate if the problem is independent, inconsistent or dependent. Thank you. x + 3 (y - 1) = 11 2(x - y) + 8y = 28 Thank you very much. Click here to see answer by Fombitz(13828)

 Question 137272: Could you please solve by using sustitution method. Please show details. Thank you. x - y = 3 3x - 2y = 3 Also please tell if it is independent, inconsistent or dependent. Click here to see answer by Fombitz(13828)

 Question 137243: can you please solve this by the substitution method? y - 2x = -7.5 3x - 5y = 3.2 Thank you for your assistance. Click here to see answer by ankor@dixie-net.com(15625)

 Question 137356: I am finding partial decomposition very intimidating-Please help if you can:)Thank You very much! Find the unknowns on the right side of the partial fraction decomposition. x+3/x^3+64=A/x=4+Bx+C/x^2-4x+16 Click here to see answer by stanbon(57224)

 Question 137354: Could someone please show me step-by-step how to solve this? Thank You for your help. Solve the system. 4x^2-4y^2=20 3x^2+2y^2=35 Click here to see answer by stanbon(57224)

 Question 137404: Tutor could you please assist and solve this by the substitution method? 3y = x + 5 3x - 9y = -10 I do so very much appreciate your help. Thank you. Click here to see answer by ptaylor(2048)