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

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Question 623143: What is linear equation in 2 variables?
Is 2x – 3/y = 7 a linear equation in 2 variables?
Why, and why not?

Click here to see answer by fcabanski(872)

Question 623157: Write the slope for a graph with a line going from 8 to 0 to -8... I really need someone to help me this is all new to me and I dont understand slopes at all. Your help will be greatly appreciated...please HELP I am so lost right!!
Thank you for your time and patience.
Click here to see answer by fcabanski(872)

Question 623158: Find the y coordinate of the points (-1), (2), (3)
=-x-4 it also wants me to graph this if I can figure out the first part of this surely I can graph it??? I dont understand what this problem even means to attempt working it...Someone please help me make since of this. Thank you very much for taking time to help a lost soul...Thanks
Click here to see answer by fcabanski(872)

Question 623212: x+4y-6=0

Click here to see answer by Alan3354(30959)

Question 623228: (r,3) , (-4,5), m=-2/5
Click here to see answer by ewatrrr(10682)

Question 623252: What is the equation of the line passing through the two points (-20,9) and (-15,4)?
Click here to see answer by jim_thompson5910(28476)

Question 623254: For the straight line defined by the points (4, 53) and (6, 87), determine the slope and y-intercept. M= ? (slope) b= ? (y-intercept)

Click here to see answer by lwsshak3(6463)

Question 623261: Graph f(x)
f(x)=-2x+5
Click here to see answer by jim_thompson5910(28476)

Question 623259: Ethan has a 20-ft piece of rope that he will cut into two pieces. One piece will be one-fourth the length of the other piece. Find the lengh of each piece.
Click here to see answer by ewatrrr(10682)

Question 623263: A certain mountain has an elevation of 19,459 feet. In 1915, the glacier on this peak covered 10 acres. By 2004 this glacier melted to only 1 acre.
Assume that this glacier melted at a constant rate each year. Find this yearly rate.
Click here to see answer by Theo(3458)

Question 623268: A certain region is losing about 29 million acres of rain forest each year.
(a)Find a linear function f that calculates the change in acres of rain forest in millions x years.
(b)find f(9)and interpret the result
Click here to see answer by smmoore(10)

Question 623267: Find the slope-intercept form for the line satisfying the following conditions.
x-intercept 2, y-intercept 1/3
The slope-intercept form for the line is?
Click here to see answer by lwsshak3(6463)

Question 623279: a cookie recipe uses twice as much flour as sugar. If the total amount of these ingredients is 2 1/4 cups,how much sugar and how much flour are in these cookies?
Click here to see answer by richwmiller(9135)

Question 623282: The sale price of a coffeemaker is $40.08. This is 40% off the original price. What was the original
price of the coffeemaker?
Click here to see answer by richwmiller(9135)

Question 623282: The sale price of a coffeemaker is $40.08. This is 40% off the original price. What was the original
price of the coffeemaker?
Click here to see answer by math-vortex(472)

Question 623278: Five times the sum of two consecutive integers is two more than three times the larger integer. find the integers.
Click here to see answer by nerdybill(6948)

Question 623338: please help me answer this equation using slope intercept form x-y=1

-x
Click here to see answer by larry0304(1)

Question 623338: please help me answer this equation using slope intercept form x-y=1

-x
Click here to see answer by Alan3354(30959)

Question 623546: please help me solve this equation
Click here to see answer by josmiceli(9649)

Question 623553: Find the x- and y-intercepts for the equation. Please show all of your work.

Click here to see answer by math-vortex(472)

Question 623548: please help me with this equation: graph the following equation, make a solution set table with at least 3 solutions, find the x intercept and y intercept and slope of -2x+y=2
Click here to see answer by solver91311(16868)

Question 623642: Indicate in standard form the equation of the line passing through the given points
M(0, 6), N(6, 0)

Click here to see answer by Alan3354(30959)

Question 623745: how do you graph y=[x]?
Click here to see answer by ewatrrr(10682)

Question 623756: find the slope-intercept form for the line satisfying the following conditions.
x-intercept 2, y-intercept 2/5
Click here to see answer by solver91311(16868)

Question 623760: The sum of three consecutive even integers is 6 more than 264. What are the integers. This is what i have so far, but i'm getting the wrong answer; i'm not getting the right answer, and i'm not sure what i did wrong. Please help and your answer will be appreciated.
x+x+2+x+4=270
3x+6=270.

Click here to see answer by Alan3354(30959)

Question 623858: Find an equation of the line parallel to the line with equation 4x - 2y = 8 and which passes through the point (2, -3)
Click here to see answer by lwsshak3(6463)

Question 623892: If you have a graph with a line going from -8 straight across with the next point on 0 and the third point on 8 how would you write an equation for this line???? I hope someone can help me with this I just dont get it....Thank you for any help you can give me.
Click here to see answer by solver91311(16868)

Question 624102: determine if {-4/5,3}IS A SOLUTION TO -5X+7Y=5 PLEASE SHOW YOUR WORK.
Click here to see answer by solver91311(16868)

Question 624117: what is the slope of the line that contains the points (0,3) and (8,-3)
Click here to see answer by lenny460(754)

Question 624165: which is the greater 1/3 or 40%
Click here to see answer by lenny460(754)

Question 624332: The cost of driving a car includes both fixed costs and mileage costs. Assume that it costs $160.50 per month for insurance and car payments and $0.22 per mile for gasoline, oil, and routine maintenance.
(a) Find values for m and b so that y = mx + b models the monthly cost of driving the car x miles.
(b) What does the value of b represent?
(a) m =
b =
Click here to see answer by solver91311(16868)

Question 624391: select the set of equations that represent the following situation. Mary invested one amount at 10% simple interest, and a second amount at 3% interest, earning $21.72 in one year. If she had switched the amounts, she would have earned $15.07. What were the two amounts.
Click here to see answer by josmiceli(9649)

Question 624483: What is the slope of the line passing through the points b–1, – 4g and b– 7, – 4g?
Click here to see answer by ewatrrr(10682)

Question 624398: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-3x+4y=1
-6x+6y=-3
Click here to see answer by Theo(3458)

Question 624402: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-x-3y=.20
5x+3y=40
Click here to see answer by math-vortex(472)

Question 624534: Write an equation in point-slope form for the line through the given point with the given slope: (-10, 9) and m = -2
Click here to see answer by jim_thompson5910(28476)

Question 624514: solve for 2x-y=10 and x+5y=49
Click here to see answer by oscargut(891)

Question 624626: hello can x = 4y + 1 and x = 4y - 1 have the same solution set?

Click here to see answer by richwmiller(9135)

Question 624640: Any help I can get will be greatly appreciate it... Thanks for your time....
Find the slope of the line using the 2 plotted points on the graph....(1,5) and (0,-7). I just cant figure this slope suff out I am s confused...Thanksfor your help!!!
Click here to see answer by rfer(12644)

Question 624659: Write the equation of the line given on the graph below??
The line is (5,-6) (0,5) (5,6) Can someone please help me I am so lost in this section of the class... Please help. Your time will be greatly appreciated. Thank You very Much!!!
Click here to see answer by lwsshak3(6463)

Question 624662: Find the x- and y- intercepts and graph the equation plotting the intercepts. Please show all your work including graph. 7x-4y=14
Can someone please help me with this problem...I just don't understand this stuff. I have a test next week and I need help bad...I would really appreciate all the help I can get on this. Thank you for your time, Im sure you have many people needing help and I appreciate any I can get. Thanks so much!!!
Click here to see answer by oscargut(891)

Question 624723: What is an equation of the line that passes through the point (−5,0) and is perpendicular to the line 5x−2y=16. Express your answer in slope-intercept form.
Click here to see answer by solver91311(16868)

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