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

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Question 851706: Solve the system to find (u,v). Hint: x = 1/u and y = 1/v. Use x and y in the equations to solve. Once you solve for x and y, set those solutions equal to 1/u and 1/v, respectively, to find (u,v):
3/u+4/v =1
6/u-2/v=1

Click here to see answer by ewatrrr(24785)

Question 852015: (6/x+1)+(1/2x)=4/x
Click here to see answer by Seutip(231)

Question 852144: what is the value of the y-coordinate of the solution to the system of equation 2x+y=8 and x-3y=-3
Click here to see answer by Fombitz(32388)

Question 852176: how do you solve
3x-2y=8
-2x+5y=-20
Click here to see answer by Fombitz(32388)

Question 852238: How do you figure out 10 things from a linear equation. And what can you figure out from one?
Click here to see answer by richard1234(7193)

Question 852291: if the determinant to system of linear equations is 0 then what do you put as answer example 3x+y=10 and 3x+y=4 no solution or infinitely many solutions is what the teacher is looking for original problem 3x+y=10 y=-3x+4
Click here to see answer by ewatrrr(24785)

Question 852346: I am really confused on how to solve Systems of Equations with substitution. How do I solve them more simply?
Click here to see answer by josgarithmetic(39618)

Question 852525: solve and graph y=3-x

Click here to see answer by Fombitz(32388)

Question 852609: Is the order pair (3,8) a solution to the system of equations 2x+y=14. 3x-2y=7
Why or why not show your work please
Click here to see answer by harpazo(655)

Question 852973: x+y=6
y=2x

Click here to see answer by Alan3354(69443)

Question 853046: Hi I am a student studying algebra 2 I do not seem to get how to solve x+y+2z= 11 and x+y+3z=14 and x+2y-z=5 because I am not able to figure out how we get x y and z...
Click here to see answer by ewatrrr(24785)

Question 853325: Solve the system by graphing. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter DEPENDENT.)
x − y = 4
2x + 3y = 13
(x, y) =

Click here to see answer by Fombitz(32388)

Question 853484: which ordered pair is a solution of the linear system
x+2y=-8 and -4x+y=5
Click here to see answer by josgarithmetic(39618)

Question 853708: The units digit of a two-digit number is 1 less than 3 times the tens digit. if the digits are reversed , the new number is 45 more than the original number. find the number .
what i have so far
U= 3X-1 (u being unit , x being tens)
10x+ U = 10u+x -45
plugged everything and answer came out decimals. which isn't on the answer sheet lol . i probably did some wrong math somewhere down the line. help me out . Thx
Click here to see answer by josgarithmetic(39618)

Question 853830: On November 4th, against the Houston Rockets, Ron Artest scored a total of 15 points, making a total of 9 shots. He scored all of his points on 2-point and 3-point shots. How many of each type did he make?
Click here to see answer by richwmiller(17219)

Question 851018: A family is canoeing downstream (with the current).Their speed relative to the banks of the river averages 2.75 mi/h. During the return trip, they paddle upstream (against the current), averaging 1.5 mi/h relative to the riverbank.
A. Write an equation for the rate of the canoe downstream.
B. Write an equation for the rate of the canoe upstream.
C. Solve the system to find the family's paddling speed in still water.
D. Find the speed of the current of the river.
Click here to see answer by richwmiller(17219)

Question 853973: Identify the solution(s) of the system of equations, if any. x + 3y = 7 3x - 6y = 1
Click here to see answer by Fombitz(32388)

Question 854145: Solve x+2y= 6 for y

Click here to see answer by harpazo(655)

Question 854152: 1/2(4x-6)=-3x+2
Click here to see answer by aditya2117(32)

Question 854152: 1/2(4x-6)=-3x+2
Click here to see answer by MathTherapy(10552)

Question 854154: -(3z+8)-9=17+3z
Click here to see answer by aditya2117(32)

Question 854154: -(3z+8)-9=17+3z
Click here to see answer by MathTherapy(10552)

Question 854150: 3y-7(y+4)=-y+6-3y
Click here to see answer by aditya2117(32)

Question 854347: it takes 12 hours to fill a swimming pool using two pipes . if the pipe of larger dia
Click here to see answer by richwmiller(17219)

Question 854443: y=3x-7
y-3x=5
The system of equations listed above is inconsistent. True or false.

Click here to see answer by Alan3354(69443)

Question 854765: use the slope-intercept form to determine the number of solution the system has.
9x-5y=6
-36x+20y=-18
Click here to see answer by ewatrrr(24785)

Question 854765: use the slope-intercept form to determine the number of solution the system has.
9x-5y=6
-36x+20y=-18
Click here to see answer by richwmiller(17219)

Question 854448: Identify the solution(s) of the system of equations, if any.
-2x-4y=1
12y = -6x-3
__No solution
__(0,-1)
__(-1,0)
__infinitely many solutions

Click here to see answer by Fombitz(32388)

Question 854853: Write the slope-intercept form of an equation of the line that passes through (4,-6) and is parallel to y= -3/4x + 1 .
I thought the answer was y= -3/4x - 9 . The answer is actually y= -3/4x -3 . Could you please explain what I did wrong?
Thank you,
Isabella
Click here to see answer by Fombitz(32388)

Question 855346: Elimination method:
eliminate x
2x-y=4
2x+5=16
Post each step.
Click here to see answer by Fombitz(32388)

Question 855388: Substitution method:
5x-2y=40
x+y=10
Click here to see answer by Alan3354(69443)

Question 855390: Elimination Method:
x + y = 3
2x + 2y = 6
Click here to see answer by josgarithmetic(39618)

Question 855389: Substitution method:
3x-6y=-2
2x-3y=1
Click here to see answer by josgarithmetic(39618)

Question 855391: Elimination Method:
3x + y = 9
5x + 4y = 22
Click here to see answer by Alan3354(69443)

Question 855488: Elimination Method:
9y + 4x = 12
5y - 2x = 10
Post Steps please. Thank you
Click here to see answer by Alan3354(69443)

Question 855480: Elimination Method:
3x + y = 9
5x + 4y = 22
Post steps used to get the answer...Please.
Thank you.
Click here to see answer by Alan3354(69443)

Question 855480: Elimination Method:
3x + y = 9
5x + 4y = 22
Post steps used to get the answer...Please.
Thank you.
Click here to see answer by KMST(5328)

Question 855481: Substitution method:
5x-2y=40
x+y=10
Post steps used to solve. Thank you.
Click here to see answer by Alan3354(69443)

Question 855482: Substitution method:
3x-6y=-2
2x-3y=1
Post steps used to solve.
Thank you.
Click here to see answer by Alan3354(69443)

Question 855623: Can you help solve this question?
10/x-2/y=-

Click here to see answer by jim_thompson5910(35256)

Question 855836: Solve using the substitution method.
4y+2x=40
3y-x=5
Post steps please.
Click here to see answer by ewatrrr(24785)

Question 855852: I need help figuring out how to put this into an equation so that I can work it and get the answers.
Kevin has half of his investments in a stock paying an 8%dividend and the other half in a stock paying 11%. if his total annual interest is $570,how much does he have invested?
answer: how much money in each account and what is the total amount invested.
Click here to see answer by ankor@dixie-net.com(22740)

Question 856247: I think you are so beautiful will you meet me at nandos and go on a date with me. see ya at five.
Click here to see answer by Alan3354(69443)

Question 856243: can you smell my butt for me
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Question 856241: I need a SAMICH
Click here to see answer by Fombitz(32388)

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