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

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Question 676665: Can somebody help me with this question? I need it answer by today.
A financial manager invested 20% of a client's money in bonds paying 9% annual simple interest, 35% in an 8% simple interest account, and the remainder in 9.5% corporate bonds. Find the amount invested in each if the total annual interest earned is $4,970.
at 9% $
at 8% $
at 9.5% $

Click here to see answer by Alan3354(69443)

Question 676683: Can you help me with this question? I need it answer by today.

For what values of k is the system of equations independent?
4x + y = 4
kx + y = 6
Write the first equation in slope-intercept form. Subtract
4x
from each side of the equation
4x + y = 4.
y = + 4
art (b)
x + 2y = 5
kx + 3y = 3

Part (c)
2x + ky = 7
x + 2y = 4

Click here to see answer by Alan3354(69443)

Question 676914: 17-3c=4c+3
Click here to see answer by littlebitlove(26)

Question 676504: show steps pleaseeeee! ~(^.^)~
6x-5z=17
5x-y+3z=-1
2x+y=-41
find x,y,and z
Click here to see answer by ankor@dixie-net.com(22740)

Question 677050: write the equation in form of y=mx+b: 3y+6x=-24
Click here to see answer by littlebitlove(26)

Question 677224: work out for 7x-2x=19

Click here to see answer by lynnlo(4176)

Question 677287: I need help on how to write an equation for a this linear function, f(-2)=15, f(1)=9
Click here to see answer by lynnlo(4176)

Question 677631: Can you help me how can I simplify completely (x^2 + 2x - xy - 2y) / (x^2 - xy + 5x - 5y)
Click here to see answer by stanbon(75887)

Question 677728: if 3x-y=15 then y=
Click here to see answer by ReadingBoosters(3246)

Question 677961: x-y=-4
3x-6y=-6
Click here to see answer by ReadingBoosters(3246)

Question 678141: solve x/3+x/4=7
Click here to see answer by Alan3354(69443)

Question 678303: What is the the slope intercept forms of these equasions?
4y+-1x=4
1y+1x=6
(4,2)
Click here to see answer by lynnlo(4176)

Question 678303: What is the the slope intercept forms of these equasions?
4y+-1x=4
1y+1x=6
(4,2)
Click here to see answer by ReadingBoosters(3246)

Question 678292: How do you turn this equasion into y=mx+b for graphing?
3x+-2y=2
-2x+y=8
With an answer of (-18,-28)
Click here to see answer by ReadingBoosters(3246)

Question 678465: (x-4)^(2)+(y-5)^(2)=8
(x+1)^(2)+(Y+2)^(2)=34
Please help me to solve this system of equations
Click here to see answer by MathLover1(20850)

Question 678535: 4x - y=9 is this ordered pair a solution of the given system of equations.

Click here to see answer by rfer(16322)

Question 678535: 4x - y=9 is this ordered pair a solution of the given system of equations.

Click here to see answer by ReadingBoosters(3246)

Question 678534: find an equation of the line L, where L is perpendicular to y=5/2x and passes through the point (2,5)
Click here to see answer by jim_thompson5910(35256)

Question 678502: -8(t-2)-(t+1)=5
Click here to see answer by ReadingBoosters(3246)

Question 678973: Write the standard form of the equation of the horizontal and vertical lines that pass through (5,8).
Click here to see answer by MathLover1(20850)

Question 678230: 3y-x=2
Click here to see answer by ReadingBoosters(3246)

Question 679082: A rental car costs a minimum charge plus a fixed charge per mile driven. One customer was charged $60 for 160 miles of use. Another customer drove 280 miles and paid $90. Write an equation relating the total cost, C (in dollars), to the miles driven, x.
Click here to see answer by partha_ban(41)

Question 679259: Find the value of 'r' so the line that passes through (-4,8) and (r, -6) has a slope of 2/3. Please show work!
Click here to see answer by ReadingBoosters(3246)

Question 679322: Please help
1. 8x-y=19
y+3x=7
2. 4x=y-11
6y+4x=-3
Click here to see answer by ReadingBoosters(3246)

Question 679506: Solving Linear Systems of equations
The problem: one is 5% acid and one is 6.5% acid . You want to make 200ml of vinegar,with 6% acid. How many ml of each vinegar do you need to mix together?
My question: With percents I get confused, and I am not sure which variables you would use to set this up into two equations?
Click here to see answer by mananth(16946)

Question 679515: 1.find the equation of a line that passes through the point (0,2)and (4,-1)
2.find the equation of a line that passes through the points (-2,0)and (0,1)

Click here to see answer by mananth(16946)

Question 679648: need help solving linear equation in three variables using the elimination method.
-3x-2y+4z=-5
2x+5y-3z=3
4x-y+7z=15

Click here to see answer by ankor@dixie-net.com(22740)

Question 679761: please can u help me with this??
2(2x-i) > 4x - 6u
Click here to see answer by lynnlo(4176)

Question 679985: need answer to ...y=6x+7 and 3x-y=2 the possible answers are A)(-3,-11) B) (-2, -8)C)(-1,1)
Click here to see answer by ReadingBoosters(3246)

Question 680086: Jasmine has 18.00 to buy books at the used book sale at the library .paperback books cost 3.00 each . the equation y = 18 - 3x represents the amount of money she has left if she buys x of paperback books. graph the equation and describe what the intercepts represents.
Click here to see answer by ReadingBoosters(3246)

Question 680378: Solve the system by the elimination method.
2a + 3b = 6
5a + 2b - 4 = 0
I still don't understand it. Thank you!
Click here to see answer by stanbon(75887)

Question 680530: How exactly do I determine whether this equation is linear?
3x - 5y
If it is linear, how do I write the equation in standard form?
PLEASE HELP!
Click here to see answer by Alan3354(69443)

Question 680570: x-2y=8
x+y=2
Click here to see answer by ReadingBoosters(3246)

Question 680675: -3x+2y=-6
-2x+y=6
Click here to see answer by stanbon(75887)

Question 680783: The question is: Solve each system algebraically. Write the solution as an ordered pair.
Problem: {x+ y= 7
{y = 2x -2
I have to find the solution but I am confused on where to begin.
Thanks for the help
Click here to see answer by mananth(16946)

Question 680844: I do not understand how they got their answer to this problem:
Write an equation of the line containing the given point and parallel to the given line
(7,-7) 6x-5y=3
My answer was y=6/5x-35/5
The correct answer is y=6/5x-77/5 How do they get 77 out of this? I am so lost..
Thank you

Click here to see answer by Alan3354(69443)

Question 681392: what is 8x+y=-4 in slope intercept form
Click here to see answer by ReadingBoosters(3246)

Question 681543: How do you solve this equation? (-6+4x=x+9)
Click here to see answer by skue(3)

Question 681668: I am nowhere close to getting the answer can you please help me with this problem?
I have to solve the system by using the substitution or elimination methods.
x/3-y/5=4
3x/4+ 2y/3=6
Click here to see answer by Alan3354(69443)

Question 681697: I am having difficulty setting up this problem. I have to solve by using a system of equations.
On the first day of school, the percentage of boys in a particular class is 60%. During the school year, six girls move away, and are replaced in the class by six boys; this makes the class roster 75% boys. Find the number of boys and girls in the class on the first day of school.
Click here to see answer by ReadingBoosters(3246)

Question 681908: When I tried to solve the sample problem my answer was wrong 2x-1y=9 5x+5y=0 this is what I did 2x-1y=9
5x+5y=0
7x+4y=9 for substitution?
Click here to see answer by Alan3354(69443)

Question 681929: 49=-9y -68
Click here to see answer by unlockmath(1688)

Question 682007: 6x-3=8x-9
Click here to see answer by ReadingBoosters(3246)

Question 681983: the perimeter of a rectangle is 48 inches.The length is 6 inches greater than the width.Define the variables,and write equaations to represent this situation.solve the system by substitution
Click here to see answer by tsewaitung(11)

Question 682015: x2-x-6?
x to the second power
Click here to see answer by jim_thompson5910(35256)

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