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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 29379: write the equation of a line parallel to y=3/4x+2 and passes through (-4,4)
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29689: 5x - 3y > -31 the goal is to graph the equation. The problem is .... the y-intercept winds up as 31/1. The program it comes from is not designed to plot such fractions on the graph. I'm not sure how to get the equation to work out to a whole integer for the y-intercept.

Click here to see answer by longjonsilver(2297)

Question 29762: how do you find the answer for the equations y=2x-2 and y=x+2?
for substitution
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29789: rewrite equation 4x-10y=11 as a function of x
i tried x=10/4y + 11/4
Click here to see answer by ikdeep(226)

Question 29801: I do not understand this problem ???
Use elimination to solve:
x/2+2y=9
2x-y=18
please help.
Click here to see answer by longjonsilver(2297)

Question 29875: How do I solve for both methods?
directions:Slove the linear equations using both substitution and combination method.
y=4x-6
3y=7-3x
Click here to see answer by Cintchr(481)

Question 30166: how do you set up the problem mix raisins cost that $5.00 per kg with peanuts that cost $3.80 a kg. How many kg of raisins should be mixed with 10kg of peanuts to obtain a mixture worth $4.00 per kg
Click here to see answer by checkley71(8403)

Question 30120: How do you solve and graph for this equation on this inequality
y<-5x
Click here to see answer by elima(1433)

Question 30467: Please help me work this problem. I have the answer but don't know how to work it. Please explain in very plain English terms!
Point A (-4,1) is in the standard (x,y) coordinate plane. What must be the coordinates of Point B so that the line x = 2 is the perpendicular bisector of AB ? (note: there is a line over AB) Thank you for your help...Karen
Click here to see answer by mbarugel(146)

Question 30484: Given these points (20, 30) and (50, 65)
Find linear model y=ax+b
Click here to see answer by atif.muhammad(135)

Question 30513: art, trudy and suelike to take exercise walks together. however, they never do actually stay together, since trudy walks at a speed that is 1 1/2 mph faster than sue's spped and art walks 1 mph slower that sue. art walks at a leisurly 2 mph. now total distance,D, in miles is the dependent variable and the time walked, t, in hours is the independent variable. i need to figure out equations for all three of the walkers.
Click here to see answer by josmiceli(19441)

Question 29931: solve for b a= 1/2bc c is squared
i tried 2a/c squared
Click here to see answer by sdmmadam@yahoo.com(530)

Question 30514: I need help with a linear function table. Here's the table:
x f(x)
-6 -15
1 -1
7 11
11 19
I tried to find the pattern for the y's and the x's so that I could find the slope, but it doesn't seem like there is a pattern. I need to write the rule for the linear equation. Can you help?
Thanks
Click here to see answer by longjonsilver(2297)

Question 30503: A marketing firm spent $12,400 in advertisements in January for Alexa's used car emporium. February sales at Alex's were $341,000. In August, the firm spent $8,600 on advertisements, and sales in the following month were $265,000.
a. write a linear equation relating the amount spent on advertisement x with sales in the following month y. write your answer in slope- intercept form.
b. use the equation found in part a to predict the sales amount if 10,000 is spent on advertisements in the previous month.
Click here to see answer by mathtech5(4)

Question 23518: why is the solver just addition? why isnt there a choice for subtraction
Click here to see answer by mathtech5(4)

Question 30571: if 6x-3y=30 and 4x=2-y then find x+y.
Click here to see answer by Cintchr(481)

Question 30672: one half of a number is 3 more than one-sixth the same number. What is this number?
Click here to see answer by blubunny01(20)

Question 30703: Can you please help with this question
what are the following points using coordinate pairs?
y-intercept
x-intercept
points are (4,0) and (0,4)
Click here to see answer by Nate(3500)

Question 30700: I am confused with what the question is asking please help.
what is the equation in standard form. points are (-3,2)and(1,2)
Click here to see answer by Nate(3500)

Question 30698: I am lost with this question. solve by the substitution method, and determine wehter the equation is dependent, independent or inconsistent.
3x-6y=5
2y=4x-6
Click here to see answer by Nate(3500)

Question 28836: Help solve this problem: One of the employers at the ticket booth was extremely busy and lost track of the number of ticket strips and unlimited-ride wristbands that were sold. jose, the ticket manager does know that the employee made a total of 500 sales, which totaled 15,425.
Write a system of equations to help jose determine the # of each type of sale. let x=the number of ticket strips and y= the # of unlimited-ride wristbands.
solve this using the substitution method.

Click here to see answer by checkley71(8403)

Question 30716: Can you please help me with this one? I think it's linear. ** A rectangle has a length 5 inches longer than its width. If both the length and the width of the rectangle are increased by 3 inches, the area of the rectangle is increased by 36 square inches. Find the original dimensions of the rectangle.
Click here to see answer by venugopalramana(3286)

Question 30791: I am completely lost with this one:
. What are the dimensions of the matrices shown below?
a)
2 1 4
1 3 5
-2 0 1
6 0 1
b)
1 3 5
-2 0 1

Click here to see answer by longjonsilver(2297)

Question 30886: Solve the system by graphing, if possible.
If the system is dependent or inconsistent, indicate this.
In those cases enter dependent or inconsistent. Otherwise, enter your answer as an ordered pair in the form (x, y).
{x -y =7
{3x + y =5

Click here to see answer by Nate(3500)

Question 30889: Solve the following system by substitution:
Solve the following system by substitution:

y =x +9
x +9y =21
If the equations of the system are dependent, or if a system is inconsistent, so indicate.
In those cases enter dependent or inconsistent. Otherwise, enter your answer as an ordered pair.

Click here to see answer by Nate(3500)

Question 30891: Solve the following system by any method:
{2(x +y) +8 =0
6x + 4y =-28
If the equations of the system are dependent, or if a system is inconsistent, so indicate.
In those cases enter dependent or inconsistent. Otherwise, enter your answer as an ordered pair.
Click here to see answer by Nate(3500)

Question 31006: show me how to get answer to
Click here to see answer by acerX(62)

Question 31126: 1. Find the slope of the line at passes through (-4,-8) and (-4,2)?
my answer was 5/4 but I tried calculating several times and came up with different answer a few time. So, please demonstrate. Thanks!
Click here to see answer by mbarugel(146)

Question 31228: could someone please help me with this equation????
use elimination to solve:
6x-y/4=-9
and 3x+2y=-30
Click here to see answer by joey_quizan(15)

Question 31285: I'm having a difficult time with this problem could I get some assistance please?
Solve the system of equations by substitution:
Y=X^2+2X-2 AND y=3x+4
Click here to see answer by troyapplehelen(46)

Question 31162: I am really confused on the following problems.
Find the equation, in standard form, for the line that has the following characteristics.
d. (5, 2); m = -1/2
e. (2,-1); (-1, 3)
for letter e. how do you use the formula m= x2-x1/ y2-y2?
any way of explaining the problems would be a big help!
Click here to see answer by troyapplehelen(46)

Question 31150: Use elimination to solve????
x/2+2y=9
2x-y=18
Click here to see answer by checkley71(8403)

Question 31266: 6+3x-4-x
Click here to see answer by brianunlv(12)

Question 31149: Use elimination to solve:
3x-y=6
x-2y=-2
Click here to see answer by checkley71(8403)

Question 31157: Please help me solve this linear equation.
Determine the slope of the line through each pair of points below.
a. (3,5); (8,9)

b. (-4,1); (2,3)

c.(7,5); (7, -3)

an answer to just one of them with an explanation of how to solve it would be helpful. :)
Click here to see answer by stanbon(75887)

Question 31421: Find the slope and the y-intercept of the equation 2x-9y+1=0
I already changed the equation to 2x+1=9y but I'm not sure if this is right or where to go from here.
Click here to see answer by stanbon(75887)

Question 31500: One number is three less than another. Their sum is fifteen. Find the numbers

Click here to see answer by mbarugel(146)

Question 31822: I need to find an equation of the line satisfying the given condtion
Through (4,2); m= -2/3
Click here to see answer by benni1013(206)

Question 31823: Write an equation in standard form for a line passing through the pair of points
(0,6) and (3,-5)
Click here to see answer by elima(1433)

Question 31977: How can i solve this by using the substitution method?
x=(1/5)y
3x+2y=26
Click here to see answer by stanbon(75887)

Question 32047: how can i solve this equation by substitution:
x+2y=7
y=3x
Click here to see answer by mukhopadhyay(490)

Question 31976: Need some help soving this by graphing.
(Systems of linear equations)
3x+y=5
-2x+3y=4

Click here to see answer by mukhopadhyay(490)

Question 32186: How can i solve this by the substitution method?
2M=N-3
3M=2N-9
Click here to see answer by checkley71(8403)

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