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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 566189: Which number is one-fourth between 2.2 and 8.5?
I chose 3.775, I am correct?
Click here to see answer by Alan3354(69443)

Question 566188: Which number is one-fourth between 2.2 and 8.5?
I chose 3.775, I am correct?
Click here to see answer by Alan3354(69443)

Question 566195: How do i solve this?
solve the linear system using substitution
x=5y-42
x+5y=48
Click here to see answer by Alan3354(69443)

Question 566178: How would you graph x + 3 = 0
I thought it would be horizontal line across -3
Click here to see answer by Alan3354(69443)

Question 566238: trying to figure out the problem for the solution 3h +4t =12. I have no idea how to figure this out. the teacher said to make your best attempt but I don't even know where to begin.
Click here to see answer by richard1234(7193)

Question 566186: I tried to use every system to solve these problems... I have an "a" and a "b" in each problem

A: x+5y = -15
y = 1/5x + 1

[ I got (-8, -1.2)for my answer]

B: 2x - 3y = -27
-3x + 2y = 23
[ I got -3 for my answer]
Click here to see answer by solver91311(24713)

Question 566470: 2x+y=5
2x+y=1 substatution

Click here to see answer by mananth(16946)

Question 566688: https://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19184/Lesson73197/UT2B_stem.gif

What is the slope of the line? I solved this and got 5/2...

Click here to see answer by Alan3354(69443)

Question 566795: Solve system of equation by the substitution method.
{y = 2x + 9
{y = 7x + 10
Click here to see answer by solver91311(24713)

Question 566738: What are the coordinates of the vertex of the graph of f(x) = 2|x| + 4?

i chose (-2,4)
Click here to see answer by jim_thompson5910(35256)

Question 566807: Solve for y
y = 2(-1/5) + 9
Click here to see answer by jim_thompson5910(35256)

Question 567023: I'm having trouble with a math problem about systems of linear equations. FInd out the values of x and y and please show your work.
7x+3y=1
4x-y=6
I thank you for the help.
Click here to see answer by stanbon(75887)

Question 567039: Line L has equation y= -5x-15. Line m has equation y=x-3. Find the point of intersection. Can you also please show your work to get your answer.
Click here to see answer by mananth(16946)

Question 567119: Birdseed costs $0.59 a pound and sunflower seeds cost %0.89. Angela's pet store wishes to make a 40-pound mixture of birdseed and sunflower seeds that sells for $0.76 per pound. How many pounds of each type of seeds should she use?
Please help me solve this application problem for systems of linear equations!
Click here to see answer by josmiceli(19441)

Question 567190: Scenario: Gas Mileage of Cars
A BMW 128ci mile per gallon is 18. The Mercedes-Benz C300 mile per gallon is 19. It cost $20.83 for the BMW to travel 100 miles. It cost $19.73 for the Mercedes-Benz to travel 100 miles. The price for a gallon of gas is $3.75. How many gallons does it take to travel 100 miles for each vehicle?
Also, what are the equations?
(solve by elimination, and show your work)
Click here to see answer by stanbon(75887)

Question 567239: Answer graphically
2x+3y = 0
x+5y = 7
Click here to see answer by mananth(16946)

Question 567539: -294/19-2x=-10.5
Click here to see answer by unlockmath(1688)

Question 567547: Are the graphs of the lines in each pair parallel? Explain.
y = -3/2x + 2
3x + 2y = 8
Click here to see answer by lwsshak3(11628)

Question 567611: 7x+2y=-13
-3x-8y=-23 using the substitution method
Click here to see answer by stanbon(75887)

Question 567653: I need help with this (solving systems).
The Science Club needs to rent a bus for a field tripe. M.S. Buses charges a $40 rental fee, plus $2 per mile. C.B. Buses charges a $20 rental fee, plus $3 per mile. For what number of miles will the total be the same? What will the charge be?
How would I solve this problem? Thank you for the help.
Click here to see answer by ankor@dixie-net.com(22740)

Question 567872: T 10:15 P.M., a train left Petersburg, Virginia, travelling east at 40 mi/h. Two hours later, another train left the same station travelling west at 35 mi/h. At what time will the trains be 230 mi apart?
Click here to see answer by mananth(16946)

Question 567938: after 12 years a man will be 3 times as old as he was 4 years ago. find his present age
Click here to see answer by stanbon(75887)

Question 567960: Can you do this for me please
5[2-3(6x-1)]
Im not sure how you do this
Click here to see answer by Earlsdon(6294)

Question 567960: Can you do this for me please
5[2-3(6x-1)]
Im not sure how you do this
Click here to see answer by Theo(13342)

Question 567964: x+y=7
x-y=3
Click here to see answer by jim_thompson5910(35256)

Question 568268: how do you make a system of equations out of a word problem?
Click here to see answer by mananth(16946)

Question 568510: What the x and the y in substitution system of equations. 3x+y=9 y=-5x+9 show details please.
Click here to see answer by jim_thompson5910(35256)

Question 568517: Please help me solve this equation:
3x-2y=5
x=y+10
Click here to see answer by jim_thompson5910(35256)

Question 568518: 2x+3y=4
x+y=3
Click here to see answer by themathtutor127(44)

Question 567293: What is 5*1/5?
Click here to see answer by jim_thompson5910(35256)

Question 568396: What is the Solution to the system?

2x - 3y = -27
-3x + 2y = 23
[ I got -3 for my answer]
Click here to see answer by jim_thompson5910(35256)

Question 568737: 4x + 7y = 8.77
8x + 14y = 15.8
I ued substitution and got x=1.2175 and y=39 over 70. Obviously I did something wrong.
Click here to see answer by mananth(16946)

Question 568770: How do I solve:
y=x^3-2x^2+x-1
y=-x^2+3x-1
I substituted y=-x^2+3x-1 -x^2+3x-1=x^3-2x^2+x-1
0=x^3-x^2-2x
Not sure what to do next
Click here to see answer by josmiceli(19441)

Question 568670: How do you tell on a coordinate graph if it is a function or not????

Click here to see answer by richard1234(7193)

Question 568888: 13x+7y=88
x+8y=-38
Solve this problem using the Solution method
Click here to see answer by mananth(16946)

Question 568731: what is x and y for this problem, whats the solution
4x+5y=48
y=3x+2
Click here to see answer by 10301650(32)

Question 569135: Which is the solution to the system?

x+5y = -15
y = 1/5x + 1

Below is how I solved it:
x+5(1/5x+1)=-15
x+(x+5)=-15
x^2+5=-15
x^2+5-5=-15-5
x^2=-20

Is this correct ?

Click here to see answer by Alan3354(69443)

Question 569202: What are the solutions to the equation below:
|2x+3|-5=12
I have chosen x=-5 or x=7
Click here to see answer by Alan3354(69443)

Question 569457: what's
4x+3y=10
y=2x
in sustitution method??
plz answer asap!!1
thnxx
Click here to see answer by josmiceli(19441)

Question 569598: how many solutions does this system of equations have???
2x+3y=6
y=-2/3x-1
it woudd be amazing if you could answer soon!
Click here to see answer by Alan3354(69443)

Question 569598: how many solutions does this system of equations have???
2x+3y=6
y=-2/3x-1
it woudd be amazing if you could answer soon!
Click here to see answer by TutorDelphia(193)

Question 569698: 28:39 What is the x-coordinate of this solution?
2x+3y=-27
-3x+2y=23
My Work is Shown Below:
3(2x-3y=-27)
-3+2y=23
__________
6x-9y=81
-3x+2y=23
_________
-18x-7y=104
+18 +18
-7y=122
__ ___
-7 -7
y= -17.42
________________________________________________________________________________
Is that correct?
Click here to see answer by Alan3354(69443)

Question 569696: 28:39 What is the x-coordinate of this solution?
2x+3y=-27
-3x+2y=23
My Work is Shown Below:
3(2x-3y=-27)
-3+2y=23
__________
6x-9y=81
-3x+2y=23
_________
-18x-7y=104
+18 +18
-7y=122
__ ___
-7 -7
y= -17.42
________________________________________________________________________________
Is that correct?
Click here to see answer by JBarnum(2146)

Question 569855: At a circus, 135 clowns are getting into cars. Blue cars hold 20 clowns and red cars only hold 15. How many of each are there?
Click here to see answer by stanbon(75887)

Question 569921: total of tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?
Click here to see answer by mananth(16946)

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