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

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Question 294749: I am not understanding how to use substitution or elimination of systems of equations. 2x+3y=8 and 3x+2y=7
Click here to see answer by Fombitz(32388)

Question 294832: Find the slope and Y-intercept of the given function equation:
x=-2
I think it is slope is undefined and their is no y-intercept, is that correct?

Click here to see answer by jim_thompson5910(35256)

Question 294896: find the slope of this line (0,0) and (3,9)
Click here to see answer by Fombitz(32388)

Question 294860: Can you help me solve (x-5)to the second power + (y-3)to the second power=4
function?
domain?
range?
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Question 294975: 1. How do you know whether to make a boundary line dashed or solid when graphing linear inequalities?
Click here to see answer by Aust05(12)

Question 295030: determine whether or not the relation y=2x 8 is linear

Click here to see answer by richwmiller(17219)

Question 295190: Are the following pairs of lines parallel, perpendicular or neither. Please show me your work.
x-2y=3
2x+y=3
My answer: x -2y = 3
x + x -2y = -x + 3
-2y/-2 = -x/-2 + 3/-2
y = 1/2x -3/2
and 2x + y = 3
-2x + 2x + y = -2x + 3
y = -2x + 3
My guess is neither?
Help, please.
Click here to see answer by richwmiller(17219)

Question 295302: Need to write the slope-intercept form of the equation
19/35y - 1514/35 = x
Click here to see answer by Fombitz(32388)

Question 295354: graph the line 2x-5y=-10
Click here to see answer by Fombitz(32388)

Question 295441: hi i was wondering if you can give me an exsample of finding the midpoint of 2 joining points my equation is E (3,5) F(8,9). thank you
Click here to see answer by Alan3354(69443)

Question 295376: I had this question on a midterm 3 weeks ago and got it completely wrong so I have no idea how to graph or compute
Find the equations for the following lines and then graph them using any graphing utility (or do it on paper and scan it in):
(a) Perpendicular to x + 2y = 10, and passing through the point (1,1)
Eric

Click here to see answer by richwmiller(17219)

Question 295528: m=0 (0,-3)
y=
what is the equation of the line in the formula of y=mx+b?
Click here to see answer by richwmiller(17219)

Question 295531: (-3,0) (0,1)
find the equation of the line with these points. Express it in the formual of y=mx+b
Click here to see answer by Alan3354(69443)

Question 295532: find the slope if it exist of the line containing these pair of points.
(-17.4,2.3) (-14.9,1.7)
Click here to see answer by Alan3354(69443)

Question 295526: (-3,9) 8x=3y+2
write an equation in the form of y=mx+b
Click here to see answer by Alan3354(69443)

Question 295495: y=-1x-2
2x-3y=-9
how do you do this
Click here to see answer by Fombitz(32388)

Question 295680: Two programmers are working on writing a new program that will check for viruses when incoming messages enter the company�s server.
The first programmer, Sammy, grossed $535 in 1 week by working 48 hours. The second programmer, Martin, grossed $587 in 1 week by working 52 hours. Time-and-a-half is paid for all hours worked in excess of 40 hours. Which programmer earns more per hour (hint: linear equations)?
Sammy takes 5 hours longer to complete 300 lines of code than Martin. Together, Sammy and Martin can complete the code in 6 hours.
Clearly explain the results showing the calculations of how long it takes each programmer to complete the code if he programs on his own (hint: quadratic equation) and at what speed he is programming lines per hour.
Click here to see answer by richwmiller(17219)

Question 295655: find f(a + h) -f (a) for the following: f(x) = 4x + 5
Click here to see answer by jim_thompson5910(35256)

Question 295746: write the equation of the line passing through points (-1,3) and (4, -20. Writ your result in slope intercept form, where possible.
Click here to see answer by Alan3354(69443)

Question 295747: Having trouble using substitution of systems of equations! .2x+.4y= 17 & 8.3x-6.3= -4.3
Click here to see answer by richwmiller(17219)

Question 295748: Having trouble with substitution of systems of equations, Help! x/3-y/5=4 & 3x/4+2y/3=6
Click here to see answer by Alan3354(69443)

Question 295791: How to find the equation of the line that passes through the point (3,-2), and is parallel to the line with equation 3x-2y=7.
do I first find the slope? Then do I use the slope intercept form to get the equation?
Click here to see answer by richwmiller(17219)

Question 295813: write the equation of the line (in slope intercept form) that passes through the point (7,5) and is perpendicular to the line x-2y=7.
First I got y on the left side: y=x/2-7/2
Now I really don't know what to do. Please help.
Click here to see answer by stanbon(75887)

Question 295829: Solve the system of equations using any method:
x/3-3y/4=-1/2
x/6-y/8=3/4
I tried to solve this problem using elimination and graphing methods. It used up 2 whole pieces of paper and I don't think I got the right answer. Which method is best for this problem? Please help.Thank you!
Click here to see answer by stanbon(75887)

Question 295832: FIND AN EQUATION OF THE LINE CONTAINING THE GIVEN PAIR OF POINTS.
(-3,-1) (-9,-6)
Click here to see answer by Alan3354(69443)

Question 295825: WRITE AN EQUATION OF THE LINE WITH THE GIVEN POINT AND PERPENDICULAR TO THE GIVEN LINE.
2,-9 9X+7Y=4
Click here to see answer by Alan3354(69443)

Question 295836: How do I find the slope of the line with this equation, x = -2?
Click here to see answer by richwmiller(17219)

Question 295821: WRITE AN EQUATION OF THE LINE WITH THE GIVEN POINT AND PARRELLEL TO THE GIVEN LINE.
-9,2 2X=3Y+7
Click here to see answer by Alan3354(69443)

Question 295862: steps to solving -5/4x=3/10-1/4 the answer is -1/25
Click here to see answer by alicealc(293)

Question 295862: steps to solving -5/4x=3/10-1/4 the answer is -1/25
Click here to see answer by stanbon(75887)

Question 295877: Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables.
John and Tony start from the same place at the same time and head for a town 10 miles away. John walks twice as fast as Tony and arrives 3 hours before Tony. Find the speed of each.
Click here to see answer by stanbon(75887)

Question 295892: please help me solve this equation
m=4/5,(2,-9)
Click here to see answer by stanbon(75887)

Question 295995: Need help solving .2x+.4y=1.7 & 8.3x-6.3y=-4.3 using subtitution or elimination, please!
Click here to see answer by Alan3354(69443)

Question 296023: What�s the equation of a line that passes through points (0, -1) and (2, 3)?
Click here to see answer by Alan3354(69443)

Question 296046: Translate the problem into a pair of linear equations in two variables. Sove the equations using either elimination or substitution. State your answer for the specified variable.
I have 2 problems I need help with.
2) An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?
Click here to see answer by richwmiller(17219)

Question 296120: Decide whether the pair of lines is paralle, perpendicular, or neither.
4x+3y=10
4x+3y=5
Click here to see answer by richwmiller(17219)

Question 296267: How do you graph and substitution 2x+y=4
-x+y=1
Click here to see answer by richwmiller(17219)

Question 296285: (5,9);x+4y=5
Click here to see answer by helpnalgebra(91)

Question 296454: Determine how many solutions exist and use either elimination or substitution to find the solutions and graph the two lines, labeling the x- intercepsts, y-intecepts, and points of intersection.
1) y = 2x + 3 and y= -x -4
Click here to see answer by richwmiller(17219)

Question 296520: Are my answers correct? I put a (*) on the correct answser.
1. Identify an equation of the line with slope -2/3 that passes through the point (0, 4).
y=-2/3x+4 *
y=-2/3x-4
y=2/3+4
y=2/3x-4

Click here to see answer by richwmiller(17219)

Question 296528: Are my answers correct? I put a (*) on the correct answser.

Click here to see answer by richwmiller(17219)

Question 296526: what are the slope and the y-intercept of the graph of
Click here to see answer by richwmiller(17219)

Question 296525: what are the slope and the y-intercept of the graph of x=-20
Click here to see answer by Alan3354(69443)

Question 296619: the sum of two consecutive multiples of 17 is 85. find the number
[i know the answer is 34 and 51, but how come?
Click here to see answer by richwmiller(17219)

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