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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 112108: Solve the system of equations y=2x-10 and x-y=7
Click here to see answer by jim_thompson5910(35256)

Question 112104: Solve the system by substitution.
5x + 3y = �19
y = �2x � 8

Click here to see answer by jim_thompson5910(35256)

Question 112100: Adult tickets for a play cost $8 and child tickets cost $6. If there were 25 people at a performance and the theater collected $188 from ticket sales, how many adults and how many children attended the play?
Click here to see answer by jim_thompson5910(35256)

Question 112087: Use elimination to solve: x/2+2y=9
2x-y=18
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Question 112307: Solve the system of equation. If the system is consistent, state the coordinates of the point of intersection. If not consistent, state whether it is inconsistent of dependent.
x-y=3
2x+3y=11
Click here to see answer by jim_thompson5910(35256)

Question 112582: Edna Britten's income from two stocks each year totals $280. Stock A pays dividends at the rate of 5% and stock B at the rate of 6%. If she has invested a total of $5000, how much is invested in each stock?
Click here to see answer by josmiceli(19441)

Question 112584: A chemist has 1000 g of a solution that is 40% acid. How many grams of water must be added to reduce the acidity to 25%?
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Question 112586: The length of a rectangle is 5 more than twice the width. The perimeter is 130. What is the area?
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Question 112619: I really need some help!!!! Please!
Solve this system of equation using either addition or substitution method.
George has two investments that yield a total of 185.60 in annual interest. The amount onvested at 8% is 320$ less than twice the amount invested at 6%. How much is invested at each rate.
Amount invested at 8% _____________
Amount invested at 6% _____________
Click here to see answer by scott8148(6628)

Question 112638: in solving systems of linear equations how do you know whether to eliminate the x's or y's?
Click here to see answer by bucky(2189)

Question 112646: Can you explain me how to solve this problem
Solve the following system
x+3y=11
6x-2y=7

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Question 112663: Please help.
Solve the following system by graphing.

3x - 6y = 9
x - 2y = 3
Thanks
JMS
Click here to see answer by chitra(359)

Question 80921: Can you please help me with this question I am totally clueless as to how to answer this question the working that is.
Given a line containing the points (1,3) , (2,4) , (3,5) determine the slope- intercept form of the equation, give one additional point on this line and graph the function.
Thank you in advance.

Click here to see answer by mathnard(10)

Question 112754:
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 10 bags of 11.6% cement to produce a mix containing 8% cement?

Click here to see answer by checkley71(8403)

Question 112802: please help me sove this problem
6x-2y=2
9x-3y=1
I need to know how to graph
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Question 113157: Having a real hard time with this...please help!
Solve system of equation word problem but either addition method or substitution method.
6x+2y=8
y=-3x
Click here to see answer by stanbon(75887)

Question 113232: I just need help setting up the equations and I can do the rest. Word problems have never been easy for me!
Substitution method or addition method from system of equations
George has two investments that yield a total of $185.60 in annual interest. The amount invested at 8% is $320 less than twice the amount invested at 6%. How much is invested at each rate?
Amount invested at 8%?
Amount invested at 6%?
Click here to see answer by SHUgrad05(58)

Question 113372: write the point slope form of the equation of the line that passes through the point and has the given slope, then rewrite the equation in slope-intercept form
(-2, 4), m = 3
Thanks for help
Click here to see answer by checkley71(8403)

Question 113371: write the point-slope form of the equation of the line that passes through the two points

(4, -2), (-9, 5)
Thanks for help
Click here to see answer by checkley71(8403)

Question 113748: how do write this as a fraction? 7.937
thank you
Click here to see answer by checkley71(8403)

Question 113929: -5x+2y=10
x-3y=11
solve using addition method
Click here to see answer by jim_thompson5910(35256)

Question 113962: Write the equation of the line passing through (4, 4) and (4, 2).
Click here to see answer by checkley71(8403)

Question 113964: Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = �3x + 1.
Click here to see answer by stanbon(75887)

Question 113975: find three consecutive integers such that the sum of the first two integers is 24 more than the third integer.
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Question 113983: Given f(x) = 5x2 � 3x + 1, find f(�2).
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Question 113983: Given f(x) = 5x2 � 3x + 1, find f(�2).
Click here to see answer by jim_thompson5910(35256)

Question 113986: Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?
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Question 113981: -10x > -20
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Question 113981: -10x > -20
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Question 113980: the base of an isosceles triangle and one of its legs have lengths that are consecutive integers. the leg is longer than the base. the perimeter of the triangle is 20. find the length of each side of the triangle.
Click here to see answer by checkley71(8403)

Question 114015: 3x + 1 > 2x + 7
Click here to see answer by jim_thompson5910(35256)

Question 114025: x + y = 8
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Question 114023: the length of a rectangle is 8 meters less than 5 times its width.if the perimeter of the rectangle is at most 104 meters, find the greatest possible length of the rectangle
Click here to see answer by checkley71(8403)

Question 114056: 3x - 2y = -4
Click here to see answer by jim_thompson5910(35256)

Question 114058:
the larger of two numbers is 1 more than 3 times the smaller. the difference between 8 times the smaller and 2 times the larger is 10. find the numbers.
Click here to see answer by checkley71(8403)

Question 114083:
HOW DO YOU GRAPH THE LINE THAT PASSES THROUGH THE (1,1) (3,3)
AND THEN WRITE THE EQUATION OF EACH LINE?
Click here to see answer by checkley71(8403)

Question 114051: 2x + 3y = 6

Click here to see answer by jayanthihemkos@yahoo.com(87)

Question 114195: At the market you purchase some apples and oranges. There were 12 items purchased. You buy twice as many apples as oranges.
how do i solve this??
Click here to see answer by stanbon(75887)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by jim_thompson5910(35256)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by stanbon(75887)

Question 114199: -5 - 2(3x - 4) = 21
how do i solve for x??
Click here to see answer by MathLover1(20850)

Question 114202: 5(3x - 6) - 8(3x - 7)
how do i simplify this??
Click here to see answer by jim_thompson5910(35256)

Question 114203: 5(3x - 6) - 8(3x - 7)
How do i simplify this??
Click here to see answer by jim_thompson5910(35256)

Question 114281: im having trouble understanding the systems of equations.....
how do i solve by graphing?? for ex: y=x+2, y=-x+4?? i dont understand how to solve then graph it......!!!!
Click here to see answer by Fombitz(32388)

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