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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 255775: what is the slope of (-5,4),m=-4?
Click here to see answer by Alan3354(69443)

Question 256522: My problem is m=7,(4,1) I tied to solve a similar one which was
m=8,(7,5) and here is what I did.
y-5=m(x-x1)
y-5=(8)(x-x1)
y-5=(8)(x-(7)
y-5=8(x+7)
y-5=8x-14
y=8x-9
however something went wrong because the answer was 8x-51 and I have no idea how to do this problem. Please help me.
Click here to see answer by Alan3354(69443)

Question 256582: What is the x-intercept of the graph of y=3x-6?
Click here to see answer by richwmiller(17219)

Question 256614: Please help me with this problem.
(7,8);x+7y=6
I have been working on these checkpoint questions for 6 hrs. now and I am so lost. Please help me.
Click here to see answer by Alan3354(69443)

Question 256631: sorry about before, here is the full question.
write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b
(7,8);x+7y=6
Click here to see answer by drk(1908)

Question 256647: Non Linear equation
F (x) = x3-5
inputs 5 and 9
Click here to see answer by drk(1908)

Question 256235: This is seventh grade math, inverse operations. I know the function for linear equations is y=k/x . the question I am having trouble with is exactly as written: f(x)=4/x graph the inverse variation function. what is "f" ? I know I have to come up with examples using the function to graph the annswers. Please help me step by step.
Click here to see answer by ankor@dixie-net.com(22740)

Question 256540: help me solve this problem 2y-4x+1=0
Click here to see answer by checkley77(12844)

Question 256670: Write an equation of the line containing the given point and parallel to the given line. Expess you answer in the form y=mx+b. (-7,7);4x=3y+7
I am trying to understand this problem, I tried to plug these numbers into my last problem, however I do not understand how you came up with some of the numbers, so it is not working for me. Please let me know how you get each number in particular when you find what b=. Thank you so much, how much would you charge to help me with the final?
Click here to see answer by stanbon(75887)

Question 256695: write an equation of the line containing the given point and perpendicular to the given line. Type your answer in the form y=mx+b simplify your answer.
(9,-9);5x+2y=3 I do not understand how to do any of these problems, please help before I fail.
Click here to see answer by Alan3354(69443)

Question 256708: write an equation of the line containing the given point and perpendicular to the given line. Type your answer in the form y=mx+b simplify your answer.
(9,-9);5x+2y=3 I do not understand how to do any of these problems, please help before I fail.
Click here to see answer by scott8148(6628)

Question 256716: can you help me find the slope passing through the points (1,-1),(1,3)
Click here to see answer by richwmiller(17219)

Question 256757: find value of k so that line (2+k)x=(2-k)y=15 has slope 3/2

Click here to see answer by nerdybill(7384)

Question 256766: write each equation in standard form and give the values of A, B, and C.
x/5=y/3

I am confused how to solve this problem using the above requirements.
Click here to see answer by Fombitz(32388)

Question 256830: Graph the equation and indentify the y-intercept.
y=1/4x
Click here to see answer by checkley77(12844)

Question 256836: Graph the equation and identify the y-intercept.
y + x= -5
Click here to see answer by richwmiller(17219)

Question 256847: going into the final exam, which will count as two thirds of the final grade. mike has test scores of 86, 80,84, and 90. what score does mike need on the final in order to earn a B, which requires an average score of 80? what does he need to earn an A, which requires an average of 90?
Click here to see answer by richwmiller(17219)

Question 256936: dont know if im in the right place direct me if im not but.. wut is
At a pet store, Rhonda paid $11.50 for 3 dog bowls and 4 bones. Kelly paid $13 for 2 dog bowls and 8 bones. How much will Andrew pay for 4 dog bowls and 2 dog bowls
this is wut i got so far
$11.50 = 3 dog bowls + 4 bones
$13 = 2 dog bowls + 8 bones
? = 4 dog bones + 2 bones
walk thrue if you can plz

thank you ahead of time
Click here to see answer by checkley77(12844)

Question 256948: i dont understand 2x-3=y could you please explain
Click here to see answer by MRperkins(300)

Question 257005: write y=1/2x + 7/4 in standard form
i did this :
y=1/2x + 7/4 then i subtracted 1/2x from both sides .
the i had this : -1/2x + y = 7/4
then i multiplied 2 for everything .
and got this :
-x + 2y = 14
is this answer correct?
Click here to see answer by solver91311(24713)

Question 257091: how do you solve
x-4y=8
Click here to see answer by solver91311(24713)

Question 257099: What is the equation of the line through (-2,-3)with an undefined slope?
Same question but with a slope of 0?
Click here to see answer by drk(1908)

Question 257108: write an equation in slope intercept form of the line that passes through (0,5) and (-3,-4)
Click here to see answer by palanisamy(496)

Question 256895: Media services charges $40 for a phone and $30/month for its economy plan.
Find a model that determines the total cost C(t) of operating a media services phone for t months.
C(t)= 30t+40 This is as far as I got.
Use the model to find the total cost for 10 months of service. Total cost =$
Thank you so much.
Click here to see answer by ankor@dixie-net.com(22740)

Question 257235: A line through the points (m, -9) and (7, m) has slope m. What is the value of m?
Click here to see answer by nerdybill(7384)

Question 257254: what is the slope and y intercept of 5x=9y+81?
Click here to see answer by unlockmath(1688)

Question 257262: what is the slope and y intercept of 9x=8y+48?
Click here to see answer by Alan3354(69443)

Question 257231: If the line that passes through the points A(2,-1) and B(3,-2) is parallel to the line ax � by + c = 0, then determine the value of a^2 � b^2.
Click here to see answer by Alan3354(69443)

Question 257270: what is the slope and y intercept of 6-1/3=7x?
Click here to see answer by Alan3354(69443)

Question 257249: the sides of paralelograms are x+y+1, x+2, 3x-4, 2y-x. find x and y and also find the perimeter of paralellogram.
Click here to see answer by richwmiller(17219)

Question 257249: the sides of paralelograms are x+y+1, x+2, 3x-4, 2y-x. find x and y and also find the perimeter of paralellogram.
Click here to see answer by CharlesG2(834)

Question 257130: write an equation for the line with slope 4.2 and y-intercept (0, 3.4)
Click here to see answer by ankor@dixie-net.com(22740)

Question 257299: solve the following system of equations for x and y
y=2+6x
y=20-3x
Click here to see answer by Fombitz(32388)

Question 257326: L+E=120 domain is 20,30,45,60
Click here to see answer by drk(1908)

Question 257125: 4x+2y=14
7x-3y=-8
Click here to see answer by Fombitz(32388)

Question 257136: show me how to find an equation of the line containing the given pair of (-2, 3) and (-4, 6)
Click here to see answer by Fombitz(32388)

Question 257122: Can anyone help me with the following problem?
Determine the slope, of the graph of the given linear equation?
y=1.3x-5
Click here to see answer by Fombitz(32388)

Question 257351: i need to write an equation of the line containing the given point and parallel to given line i do not understand how to express in y=mx+b.
(2,9,); x+4y=9
Click here to see answer by dabanfield(803)

Question 257339: Write the product in the simpliest form.
The dot is multiple by the problem as a hole. sorry I don't know how to properly write it out on the computer.
- 19/63y .9y
Click here to see answer by Alan3354(69443)

Question 257554: 4. The line y=0.15x+0.79

represents an estimate of the average cost of gasoline for each year. The line
0.11x-y=-0.85

estimates the price of gasoline in January of each year (Bureau of Labor Statistics, 2006).
a) Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning.
b) Use the equations of the lines to determine if they are parallel. What did you find?
c) Did your answer to part b confirm your expectation in part a?

Click here to see answer by palanisamy(496)

Question 257290: Point A (-4,1) IS THE STANDARD (x,y) coordinate plane what must be the coordinate of point B so that the line x-2 is the perpendicular bisector of AB
Click here to see answer by dabanfield(803)

Question 257669: find the endpoint of the line segment having the given endpoints (-1, -3) and (7, 0)

Thank you in advance!
Click here to see answer by richwmiller(17219)

Question 257690: y=-2/7x-1/5 how do i find the slope and the y intercept of the line and then put it in lowest terms
Click here to see answer by richwmiller(17219)

Question 257707: I need to know how to multiply -2.1 over 2(-0.03) I can't get the correct answer I keep getting a fraction answer on my calculator the answer to this is 35 how did they get that answer??????? help
Click here to see answer by richwmiller(17219)

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