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

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Question 238117: How do I find the missing coordinate? (3, ) is a solution of y= 4-3x..Trying to help son with homework and I never took algebra in high school. I guess I am learning right along with him. Thanks for any assistance.
Click here to see answer by Theo(3504)

Question 238144: Find the equation of a line parallel to y=3x-4 and passing through (-1,1)
Click here to see answer by solver91311(17077)

Question 238154: find the x and y intercepts of f(x)=x^2-2x
Click here to see answer by solver91311(17077)

Question 238263: Hi, I'm stuck on a math problem and I was wondering if you could help me. I need to find the equation of the line given a point and slope, which would be (-3,8), m=4/9. I've tried blancing method, but I think I'm doing it wrong.
Click here to see answer by alicealc(281)

Question 238266: (-2,5) (1,0) determine the slope line
Click here to see answer by alicealc(281)

Question 238270: The directions are Solve each system by elimination. Check your answers. The first problem is
x-y+z=-1 x+y+3z=-3 2x-y+2z=0
I've tried this like 15 times and cannot figure it out. Most of the time I would check what I got and it would be 1 instead of -1 or 3 instead of -3... I know how to do them I think. But I just can't get it.
Click here to see answer by alicealc(281)

Question 238268: `' What is the slope of a binomial 2x+3''
Click here to see answer by Edwin McCravy(8999)

Question 238276: Write an equation in the form Ax + By = C, given that m = ; y-intercept (0, -3).
Click here to see answer by checkley77(12569)

Question 238462: What is the slope of the line 5/2 x + 3/2 y = 49/10 ?
(A) 5/3 (B) 3/5 (C) −5/3 (D) −3/5 (E) None of the above.
Click here to see answer by vleith(2825)

Question 238490: what is x and y of x-4y=8
Click here to see answer by checkley77(12569)

Question 238466: Find an equation in standard form for the line through (4, 1) and perpendicular to 3x + y = 5.
A) x − 3y = 1 B) x + 3y = 7 C) 3x + y =13 D) 3x − y =11
E) none of these
Click here to see answer by Fombitz(13828)

Question 238387: how do i write y=-9-3(x=3) in intercept form?
Click here to see answer by Fombitz(13828)

Question 238511: find an equation of the line that has a y-intercept of 2 that is parallel to the graph of the line 4x+2y=8
Click here to see answer by Fombitz(13828)

Question 238599: I was given two points on finding an equation in slope-intercept form through (8, -1) and (4, 3). Here is what I have done and I have no clue if it is right or not.
m=3-(-1)/4-8
m=4/-4
m= -1
y-3 = -1 (x-4)
y-3 = -1x -4
y = -1x + 4 + 1
y = -1x + 5
would this be the equation in slope- intercept form?
Click here to see answer by jim_thompson5910(28715)

Question 238577: Is y = 2x + 5 and y = 2x - 1 parallel, perpendicular, or niether?
Click here to see answer by user_dude2008(1861)

Question 238614: Solve each system of equations by graphing. I dont understand how to switch it into a slope intercept form. I've seen many examples from the book but dont understand how they get the numbers. Will you explain it to me please?
x + 2y = 6
2x + y = 9
Click here to see answer by jim_thompson5910(28715)

Question 237747: Write y = x + 6 in standard form using integers.
Click here to see answer by College Student(505)

Question 238616: Find an equation in slope-intercept form for each line through (-2, 6), perpendicular to 2x - 3y = 5.
I would appreciated some help here if you do not mind. This has been hard, hopefully my brain will pick up from taking algebra over 30 years ago.
Click here to see answer by jim_thompson5910(28715)

Question 238600: Use slopes to show that the square with virtices at (-2,5), (4, 5), (4, -1), and (-2, -1) has diagonals that are perpendicular.
I have looked over my chapter this week and I really need a refresher course quickly because it has been over 30 years since I have taken a math clas of this nature. This is only my first week and I have become really frustrated and lord knows, I have got to pass this class to get my degree in MR. I just need to learn how to function with all these x's and y's.
Thank you for your help, I really appreciated it.
Click here to see answer by stanbon(57967)

Question 238623: i have to change from standard form to slope intercept form
then find the solution to the system by subsitution. how do i do that?
Click here to see answer by stanbon(57967)

Question 238650: solve. system by substitution
y=-4x-7
y=3x
Click here to see answer by College Student(505)

Question 238534: Identify the x and y intercepts, slope, and determine if the equation is in standard, point-slope or slope-intercept form: x+13y=4
Click here to see answer by ankor@dixie-net.com(15746)

Question 238667: Marginal Cost of Coffee. The manager of a restaurant found that the cost to produce 100 cups of coffee is $11.02, while the cost to produce 400 cups is $40.12. Assume the cost C(x) is a linear function of x, the number of cups produced.
a. Find a formula for C(x).
b. What is the fixed cost?
c.Find the total cost of producing 1000 cups.
d. Find the total cost of producing 1001 cups.
e. Find the marginal cost of the 1001st cup.
f. What is the marginal cost of any cup and what does this mean to the manager?
I would appreciate any help at all if possible. This is really getting on my nerves. Thanks to who may help me.
Click here to see answer by solver91311(17077)

Question 238580: -2x-10y=-12
3x+y=4
find value of (x,y)
Click here to see answer by unlockmath(1614)

Question 238693: I need help with my home work please. I can not figure out this equation. Find the equation of the line containing the given pair of points (4,2) and (12,5)
Click here to see answer by anantha(86)

Question 238653: solve using addition method
3/7x+5/9y=27
1/9x+2/7y=7
Click here to see answer by checkley77(12569)

Question 238634: To achieve the maximum benefit for the heart when exercising, your heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by taking 70% of the difference between 220 and your age. The upper limit is found by using 85%.
D) Two women in an aerobics class stop to take their pulse, and are surprised to find that they have the same pulse. One woman is 36 years older than the other and is working at the upper limit of her target heart rate zone.The younger woman is working at the lower limit of her target heart rate zone. What are the ages of the two women, and what is their pulse?
Click here to see answer by ankor@dixie-net.com(15746)

Question 238654: solve using addition method
3x-2.5y=7.125
2.5x-3y=7.3125
Click here to see answer by Alan3354(31532)

Question 237915: 2y=5x-6
Click here to see answer by College Student(505)

Question 237930: Determine a relationship between the x‐ and y‐values. Write an equation.

x 1,2,3,4
y -1,-2,-3,-4

Click here to see answer by College Student(505)

Question 238001: 9x-7y=-7
Click here to see answer by College Student(505)

Question 238899: write n equation of the line contaning the given point and parallel to the given line

(6,8); x+4y=3
Click here to see answer by Alan3354(31532)

Question 238949: A chart shows ideal heights and weights for adults with a medium build. A person with a medium build of 60 inches should have a weight of 112 pounds and a height of 66 inches should have a weight of 136.
HOW DO I WRITE A LINEAR EQUATION FOR THIS PROBLEM??
Click here to see answer by stanbon(57967)

Question 239052: How do I re-write the equation of 5x + 7y - 35 = 0 in slope-intercept form?
Thanks
Click here to see answer by College Student(505)

Question 239087: Write an equation for line that passes (10,4) and (-5, 13)
Thanks!

Click here to see answer by checkley77(12569)

Question 239152: How do I find the point of intersection of the pair of straight lines
y=-8x-10
-y=9x+9
(x,y)= (?,?)
Click here to see answer by checkley77(12569)

Question 239175: 2/3x-7=-17
Click here to see answer by rfer(12730)

Question 239223: Is y=-7+6x a linear equation, if so how is it written in simplest form?
Click here to see answer by College Student(505)

Question 239221: Is y=2x+5 and linear equation, and if it is, how would you write it in simplest form?
Click here to see answer by College Student(505)

Question 239254: How do I determine whether the following lines are parallel? 3x=y and 2y-6x=5
Click here to see answer by josmiceli(9817)

Question 239215: What is the slope of a line parallel to y=3x-8. Can you please explain how I go about finding this. Won't the slope of parallel lines be the same slope but different y-intercepts?
Click here to see answer by ankor@dixie-net.com(15746)

Question 239272: Find the slope of the line.
x=5

Click here to see answer by Theo(3504)

Question 239379: find the slope and the y-intercept of the line 15x + 9y = –27
Click here to see answer by nyc_function(2733)

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