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

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Question 963518: a ladder is leaning against a house. the bottom of the ladder is 8 feet from the house. the top of the ladder is leaning against the house 15 feet above the ground. find the slope of the ladder.
please solve this word problem!

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Question 963731: find the x intercept and y intercept. then graph.
x-3y=6

Click here to see answer by macston(5194) About Me 

Question 963730: determine the slope and the y intercept. use the slope and the iy intercept and graph.
2y=5x-6

Click here to see answer by Fombitz(32388) About Me 

Question 963740: a relations graph contains points (2,3) and (5,3) could a relation be a function? explain.
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Question 963942: x^2+y^2=76
x^2-y^2=4

What are all the possible solutions?

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Question 963969: What is the parallel line to y=25x+45?
What is a line that never crosses the lines y=25x+45 and y=20x+120?

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Question 964037: The cost of four pencil and two eraser is Rs10 while the cost of 6 pencil and 3 eraser is Rs 16
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Question 964083: fit a multiple linear regeration equation of y on x1 and x from the folloawing data and interpret the results.
y:16 13 7 11 10
x1: 8 7 9 10 6
x2: 18 16 9 10 8

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Question 964101: Hi I would like to know what 5x+4=2x+25 is not just the answer like worked out
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Question 964176: I am having trouble with a question the is the following, Write an equation in slope intercept form for the line that passes through the given point and is perpendicular to the given line
(3,-2);y=3x+2

Click here to see answer by josgarithmetic(39617) About Me 

Question 964169: A motor boat travels 137.5 miles upstream in 2.5 hours. The next day it travels downstream to the starting point in 5.5 hours. What is the speed of the boat, and of the current?
Click here to see answer by amarjeeth123(569) About Me 

Question 964049: The Linear equation for a company that sells plastic airtight containers is P= a+bx, where P is the profit in Rands, x is the number of units sold, and a andb are constants. When 100 units are sold, the profit is R21 000 and when 450 units are sold, the profit is R126 000.
Determine the values if a and b.
Draw a neat graph showing profit as a function of the number of units sold.

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

Question 964314: Solve for x: y = 4 mx + 5 b
Click here to see answer by EdenWolf(517) About Me 

Question 964276: i don't have the actual graph but it says the graph below shows the solution to y=2x-5. then the next question says (part a): graph the solution to y= -1/2x on the same coordinate plan. (part b) says: using the graph you drew in (part a), what point is the solution to the system of equations y=-1/2x and y=2x-5? (part c)says:suppose you graph the solutions to y=2x-5 and y=5/2x+5 on the same coordinate plane and notice that the lines do not intersect. is there a solution to the system of equations? Explain your reasoning's pleasee
okay the next questions is
Amanda found the equation 10x+5y=20 in the "linear equations" chapter of her math book. (part a) says: what is an equation that can be written with Amanda's equation to form a pair of linear equations such that the system of equations has exactly one solution.
Part b says: what is an equation that can be written with Amanda's equation to form a pair of linear equations such that the system of equations has infinitely many solutions?
Part C: what is an equation that can be written with Amanda's equation to form a pair of linear equations such that there is no solution?
Part d: how many possible answers are there to Parts a,b,and c? explain your reasoning please

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

Question 964358: how can i identify a linear equation... by seeing the equation. . and cant understanding the 2 terms of linear equation. ...
1.linear different equation with constant coefficient
2.linear differential equation with variable coefficient

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Question 964407: m m m m
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Question 964436: vertical; through (-4,-3)
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Question 964521: the equation 10x + 5y = 20 in the "Linear Equations" chapter of her maht book.
Part A: What is an equation that can be written with Amanda's equation to form a pair of linear equations such that the system of equations has exactly one solution?

Click here to see answer by Alan3354(69443) About Me 
Question 964521: the equation 10x + 5y = 20 in the "Linear Equations" chapter of her maht book.
Part A: What is an equation that can be written with Amanda's equation to form a pair of linear equations such that the system of equations has exactly one solution?

Click here to see answer by MathLover1(20849) About Me 

Question 964523: the equation 10x + 5y = 20 in the "Linear Equations" chapter of her maht book.
Part B: What is an equation that can be written with Amanda's equation to form a pair of linear equations such that the system of equations has infinitely many solutions?

Click here to see answer by stanbon(75887) About Me 

Question 964526: Claudia is reading a book that has 360 pages. She read some of the book last week. She plans to read 47 pages today. When she does , she will be 4/5 of the way through the book. How many pages did she read last week.
I tried 360=x+46 but I don't know where to put the 4/5 and I'm very confused.

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Question 964569: find an equation of the line that has the given slope and contains the given point. If the possible, write your equation in slope-intercept form. Check that the ordered pair which represents the given point satisfies your equation.
m is undefined, (-2,4)

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Question 964580: There are 83 students in school. The number of boys is 31 less than 2 times the number of girls. How many boys and girls are there

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Question 964567: find an equation of the line that passes through the two given points. if possible, write your equation in slope-intercept form. Check that the graph of your equation contains the given points.
(-5,-4) and (-2,-10)

Click here to see answer by Fombitz(32388) About Me 

Question 964633: How to graph X+y-1=0
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Question 964439: What is the slope of the line x=-3?
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Question 964460: linear equations using straight line 5x+3y= 13 y-x=13
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Question 964654: A can do a certain job in 4 hrs, B can do the job in 6 hrs, and C can do the job in 8 hrs. How long will it take to do the job if A and B work 1 hr and B and C finish the job?
Click here to see answer by josgarithmetic(39617) About Me 

Question 964725: Write an equation for the line parallel to the graph of y=7x+2 and containing (3,22).
Click here to see answer by Fombitz(32388) About Me 

Question 964476: Graph the equation by plotting points y+2x=1
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Question 964734: Find the slope and the intercept, in the following function: f(x)=0.3x
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Question 964748: Please help with 8x - 4y = -4
Click here to see answer by Alan3354(69443) About Me 

Question 964758: 4y=-3
Click here to see answer by macston(5194) About Me 

Question 964868: trying to solve by graphing but can find solution. help me please.
2x-y=-8
-3x+2y=10

Click here to see answer by Alan3354(69443) About Me 
Question 964868: trying to solve by graphing but can find solution. help me please.
2x-y=-8
-3x+2y=10

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Question 964868: trying to solve by graphing but can find solution. help me please.
2x-y=-8
-3x+2y=10

Click here to see answer by Edwin McCravy(20055) About Me 

Question 964760: Consider the equation below.
1/5 (x+2) + 2x = 6x - 10
Part A: Which property can be used to simplify the expression 1/5(x+2)?

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Question 964764: 8x - 4y = -4. Please solve.
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Question 964779: For a certain value of k, the system
x+y+3z=10
-4x+2y+5z=7
kx+z=3
has no solutions. What is this value of k?

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Question 964988: how do i rewrite x2 - 6x + 9 as a square of a linear expression.
Click here to see answer by macston(5194) About Me 

Question 964983: Plot the following equation using the x- and y-intercepts. If both intercepts are zero, find at least one other point.
x - y = 3

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Question 965022: write the equation of the line perpendicular to 6x+7y=4 that passes through the point (5,-7)
Click here to see answer by Fombitz(32388) About Me 

Question 965154: Write an equation in slope intercept form, y = mx + b, of the line that has a slope of 0, and contains the point, (–7, 8). Select the correct equation
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Question 965157: What is the vertex of y=x^2-5
Click here to see answer by t0hierry(194) About Me 

Question 965172: give the slope and y-intercept for each equation and then the number of solutions for the system:
x + 200y = -30
10x - 70y = 100
I have attempted to solve this by first solving for y, and then inputting y into the equations, but my "y" doesn't seem right...I came up with y = -400/270... I didn't go further because it didn't seem correct

Click here to see answer by josgarithmetic(39617) About Me 

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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