Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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Question 153139: Find the slope and y-intercept of the line, 2x-5y=10.
Click here to see answer by stanbon(75887)

Question 153143: Please answer the following problem: Use the point-slope form to write an equation of the line that passes through the point (5, -7) with a slope of 3/5.
Click here to see answer by stanbon(75887)

Question 153151: I'm really having a hard time figuring these out can somebody help me please?

1. How do we write the equation of a horizontal line? What would be an example?
2. How do we write the equation of a vertical line? What would be an example?
3. The points (3, 9), (5, 13), (15, 33), (34, 71), (678, 1359), and (1234, 2471) all lie on line M.
The points (3, -9), (5, -11), (15, -21), (34, -40), (678, -684), and (1234, -1240) all lie on line N.
a. Form the equations of both the lines. Show your work.
b. What are the co-ordinates of the point of intersection of lines M and N?
c. Write the co-ordinates of the intersections of lines M and N with the x-axis.
d. Write the co-ordinates of the intersection of lines M and N with the y-axis.

Click here to see answer by mangopeeler07(462)

Question 152361: please help me find the linear equation of y=-x-1
Click here to see answer by orca(409)

Question 153203: sketch the parabola using the algorithm. Label axis of symetry, vertex, and x and y intercepts
Click here to see answer by jim_thompson5910(35256)

Question 153217: Find the slope of the line containing the points (2,5) and (4,9).
Click here to see answer by mangopeeler07(462)

Question 153217: Find the slope of the line containing the points (2,5) and (4,9).
Click here to see answer by jim_thompson5910(35256)

Question 153220: Find the solution of the system; type and ordered pair.
9x-2y=-47
8x+48=y
Please talk me through this. I have quite a few examples of how to solve it, it's just that instead of an addition sign theres a subtraction sign and it's confusing my dumb little mind.
Click here to see answer by stanbon(75887)

Question 153233: c=2n+20
Click here to see answer by jim_thompson5910(35256)

Question 153246: ok i have to solve this equation.
S=2WL+2LH+2WH (solve for L)
Click here to see answer by ankor@dixie-net.com(22740)

Question 153246: ok i have to solve this equation.
S=2WL+2LH+2WH (solve for L)
Click here to see answer by vleith(2983)

Question 153231: I need help understanding how to determine this equation. I am trying to help my daughter with her worksheet, of course the school has not assigned text books yet (I asked for that also).
Month Average numbe of nightly visitors
Jan 32
Feb 25
Mar 12
Apr 17
May 10
Use the scatter plot that you made to find an equation that models the average number of nightly visitors as a function of the number of months since January.
Click here to see answer by stanbon(75887)

Question 153264: Can You please help me this these problems
1. Solve the equation using addition (elimination) method. If the answere is an unique solution present it as an ordered pair:(x,y),if not specify whether the answere is "no solution" or "infinitely many solution"
5x-4y =1
- 10x +8y + =-3
2. Solve the equation by using the substitution method. If the answere is a unique solution present it as an ordered pair. If not specify whether it "no solution" or "infinitely many solution.
7x + y = 1
3x + 2y = -9
Click here to see answer by oscargut(2103)

Question 153402: Solve for x:
4x = 3xy-2
Im not sure if I divide both sides by 3x (including the "-2") or if I divide both sides by x.
Click here to see answer by Earlsdon(6294)

Question 153428: I have a few questions like these in my college algebra book with no examples to help.
10-13/x=4+5/x
and
x/(x+4) + 4/(x+4) + 2= 0
Click here to see answer by Earlsdon(6294)

Question 153464: g(m+1) if g(x)=2x^2-4x+2
Click here to see answer by orca(409)

Question 153499: Please help me with these problems
1. Find the equation in standard form,with all integer coefficients of the line perpendicular to x- 2y = 24 and passing through (1,3)
2.Solve the system of equation using the addition (elimination method)if the answer is a solution present it in ordered pair(x,y) if not specify wheather it a "no solution or "infinite many solution"
x + 2y = 5
3x + 4y = 1
Click here to see answer by Fombitz(32388)

Question 153533: solve for x
-.3(x-5)+4(x-6)=.1x-9
Click here to see answer by stanbon(75887)

Question 153545: Please help me solve the following graphing question (from the worksheet):
Graph:
x+y=5
3x-y=11
On my own, i found that the y-intercept formula for x+y=5 was y=-x+5. I also found out that the y-intercept formula for 3x-y=11 was y=3x-11. Although i'm not completely sure i'm correct, i'm quite not sure on how to graph these two equations.
Click here to see answer by Fombitz(32388)

Question 153575: line perpendicular to x-2y=24 and passing through (1,-3)
Click here to see answer by nerdybill(7384)

Question 153589: I need help solving this linear equation in three variables
5y -7z = 14
2x + y + 4z = 10
2x + 6y - 3z = 30
please help me solve this equation.\
thanks
megan
Click here to see answer by Edwin McCravy(20055)

Question 153565: . Solve the system of equations using the addition (elimination) method.
If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is �no solution� or �infinitely many solutions.�
5x � 4y = 1
-10x + 8y = -3

Click here to see answer by jim_thompson5910(35256)

Question 153615: Find the slope of the line tht runs between (10, -4) and (-2,6) Express your answer as a fraction.
Click here to see answer by jim_thompson5910(35256)

Question 153614: If f(x)=x^2-2x-7, find the following values: f(3) and f(-4)
Click here to see answer by jim_thompson5910(35256)

Question 153662: What is the gradient of the graph of the linear equation 7x-4y=28?
Click here to see answer by vleith(2983)

Question 153649: Complete each ordered pair so that it is a solution of the given linear equation. Then, choose which graph represents the given linear equation. The linear equation is -3x+5y=-15.
They gave us the following as the ordered pairs: (0, ); ( ,5);( ,-9). I figured out the missing numbers so the ordered pairs look like this: (0,-3);(5,0) and
(-20,-9). I can't figure out how to graph the linear equation: -3x+5y=-15.
Click here to see answer by Fombitz(32388)

Question 153681: I do not understand how to solve systems of linear equations in three variables.
Could someone please explain how I would solve this problem
x+y-z=-1
-4x+-y+2z=-7
2x+-2y+-5z=7
Click here to see answer by Fombitz(32388)

Question 153704: 2x-3y=6 graph the linear equation by first finding the intercepts
Click here to see answer by nerdybill(7384)

Question 153707: I need help solving for variables in a word problem. I am not very good at word problems could someone please walk me through this problem.
The perimeter of a quadrilateral (4 sided polygon) is 29 inches. THe longest side is twice as long as the shortest side. The other two sides are equally long and are 2 inches longer than the shortest side. Find the length of all four sides.
Im not even sure how to pull an equation from this. please help
thank you
Click here to see answer by nerdybill(7384)

Question 153718: I have a word problem that I need some help with.
The sum of the digits of a three-digit number is 15. The tens place digit is twice the hundreds-place digit, and the ones place digit is 1 less than the hundreds-place digit. Find the three digit number.
I thought
15=2x+x+x-1
Im pretty sure this isn't right. could you please help me with this word problem. when do I know to use x or y? please help me work through the equation also.
thank you
Click here to see answer by nerdybill(7384)

Question 153701: Could anyone help? Find the slope of the given relations defined by these equations. A. y=0 B. 3x=2y-4 C. y=2/3x D. 4y=3x+4
Click here to see answer by Fombitz(32388)

Question 153841: I need help working through this word problem.
In 1998, 1.7 million electronic bill statements were delivered and payments occured. In 2002, that number rose to 9.9 million.
a) write two ordered pairs of the form (years after 1998, millions of electronic bills).
b) the relationship between years after 1998 and 2002 is approximately linear over this period. Use the ordered pairs from part a to write an equation of the line relating to electronic bills.
c) Use the linear equation from part (b) to estimate the lectronic bills to be delivered and pain in 2006.
please help me with this problem
thank you
Click here to see answer by stanbon(75887)

Question 153846: I need help with this word problem
during the 2003 NBA playoffs, the top-scoring player was Kobe Bryant of the Los Angeles Lakers. Bryant scored a totals of 385 points during the playoffs. The number of free throws (each worth one point) he made was 11 more than three times the number of three-point field goals he made. Bryant also made 26 fewer free throws than two-point field goals. How many free throaw, two point field goals. and three point field goals did Kobe Bryant make during the 2003 playoffs?
please help me with this equation
thanks
Click here to see answer by stanbon(75887)

Question 153686: Find the slope of the given relations defined by these equations. 1. Y=2x-4 2. 2x+5y-7=0 3. 3y=-4x+1/2 Could I get some help please.
Click here to see answer by ankor@dixie-net.com(22740)

Question 153895: find a slope-intercept form equation for the line.
the line through the points (-4,5), (4,3)
Click here to see answer by vleith(2983)

Question 153910: An Electronics Firm manufactures calculators at the McGregor plant and the Ennis Plant. At McGregor, the unit cost is $8.40, and the fixed cost is $7480. At Ennis, the unit cost is $7.880, and the fixed cost is $5419. The company wants the two plants to produce a combined total of 1500 calculators, and the total costs at each plant must be the same. How many should be produced at each plant?
Click here to see answer by stanbon(75887)

Question 153911: I would like to see a step by step solving for y=4x. HOw do I figure the plotting points?
Click here to see answer by checkley77(12844)

Question 153785: Plot each pair of points and find the slope of the line containing them. Interpret the slope and graph the line.
(2,0);(2.2) I can graph it but don't under the rest of what the book is asking
Click here to see answer by checkley77(12844)

Question 153930: I seem to have a problem understanding HOW to plot a graph. I'm willing to try but I'm visually oriented and need to see the graph in front of me so that I can work backwards in order to figure out what needs to be done. This is the graph I am trying to plot:
y = 5x - 2
Thank you.
Click here to see answer by Alan3354(69443)

Question 153891: totally lost, I have to sketch a graph and find the vertex, x and y intercept, domain, range and the transformation I'm able to graph on calculator but that's no help to me
a)
b)
c)
Thanks any help is appreciated
Click here to see answer by Edwin McCravy(20055)

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27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045