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

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Question 563585: write the slope-intercept equation for the line that passes through (5,4) and (7,8) please show all of your work
Click here to see answer by mananth(16946)

Question 563593: I need help graphing y=270-3x. What does it look like on a graph??
Click here to see answer by Alan3354(69443)

Question 563625: the slope of 9y= 1/2x-4
Click here to see answer by stanbon(75887)

Question 563653: Hi there, this is the question: Maggie is x years old, Nigel is twice maggies age, Helen is 4 years older than nigel.
Their total combined age is 64 years. Form an equation and solve it to find helens age.
Cheers
Click here to see answer by josmiceli(19441)

Question 563712: Write the equation of the line, in slope-intercept form, that contains the points: (-5,-4) and (-10,-2)
Click here to see answer by solver91311(24713)

Question 563734: I have a word problem that I have been trying to understand:
The sum of three numbers is 150
o The largest is 25 times the smallest
o While the sum of the smallest and three times the largest is 50.
o What are my numbers?
I my problem set up like x+y+z=150
Click here to see answer by Alan3354(69443)

Question 563736: Find the x and y intercept of the following functions using your calculator: (I also need to know how to do it on paper)
y= -2/5x+3
Click here to see answer by Tatiana_Stebko(1539)

Question 563973: the slope of (6,-9) and (2,-5)

Click here to see answer by rfer(16322)

Question 564007: Question 1: write an equation for a line that is parallel to the y-axis?
Question 2: what is the x-intercept for the line whose equation you wrote?
Question 2 What is the y-intercept for the line whose equation you wrote?
Click here to see answer by Edwin McCravy(20055)

Question 564044: Draw y= -3x+5 using the slope and the y-intercept?
Click here to see answer by TutorDelphia(193)

Question 564061: (3x-5)(4x-7)
Click here to see answer by stanbon(75887)

Question 563998: Hi, I need help trying to understand how to do this problem. I have seen this problem on this site, but I still can't understand how to do it. Can somebody please explain this to me. Your company would like to know how sales levels affect profits. If too few items are sold, then there is a loss. Even if too many items are sold, however, the company can lose money (likely because of low pricing). It is good to know how many items can be sold to make a profit.
P(x)= -x^2 +110x - 1000
This function can be used to compute the profit (in thousands of dollars)from producing and selling a certain number, x, of thousands of smartphones.
A. Compute the following: P(5), P(50), P(120). Then interpret the results.
B. Then how do I graph the function? C. Discuss and interpret the meaning where the profit function crosses the x-axis. Also, discuss where the graph is above and below the x-axis, explaining what that means in terms of profitability.
Click here to see answer by KMST(5328)

Question 564133: I want to know how to solve the following system using process of elimination please:
2y + 4z = 2
x + y + 2z = -2
2x + y + z = 2

Steps on how to solve this would be wonderful!!
Click here to see answer by mananth(16946)

Question 564154: Hello,
I have this question that I have to give an analysis of whether each of these equations fit based on the /information below. Please help, thankyou
Equations:
y = x
y = 4x + 5
y = 4x � 5
y = -4x + 5
y ≥ -4x + 5
x + 3y = 9
y = -3
y < -3

Questions:
Passes Through the Origin, Has a Positive, Y-Intercept, Has a Negative Y-Intercept, Has a Positive Slope, Has a Negative Slope, Has an Undefined Slope, Has a Slope of Zero

Click here to see answer by mananth(16946)

Question 564268: What is a system of equations that goes through the point (1,1) when graphed?
Click here to see answer by TutorDelphia(193)

Question 564280: what is the slope of a line that passes through the points (-4,4) and (6,-8)
Click here to see answer by ad_alta(240)

Question 564339: I need help solving the linear system 5x+y=12 -4x-2y+0.
Click here to see answer by Alan3354(69443)

Question 564328: I need help on solving the linear system -4x+3y=1 3x+y=9 using substitution.
Click here to see answer by ad_alta(240)

Question 564430: I have finals coming up so I have been studying but everywhere I look I can not figure out this one problem. 0= -y + 3 + 7 x find the slope of each line . I know it is 7 because I checked the answer key but I am trying to figure out how they got it .
Click here to see answer by stanbon(75887)

Question 564512: if you have a quiz with 16 questions on it and you miss 7 what is your grade

Click here to see answer by stanbon(75887)

Question 564512: if you have a quiz with 16 questions on it and you miss 7 what is your grade

Click here to see answer by TutorDelphia(193)

Question 564609: Please help me understand how to solve this.
t+m=2.10
2t+3m=5.15
Click here to see answer by ankor@dixie-net.com(22740)

Question 564673: in standard form what is an equation that is perpendicular to 5x+y=4 and goes through points (8,9)?
Click here to see answer by mananth(16946)

Question 564634: 4x+2y=5
4x+2y=1
are these equations parallel or perpendicular?
Click here to see answer by mananth(16946)

Question 564629: Solve graphically y = 2x - 6 and y = -2x + 10. Write down the co-ordinates of the point of intersection of the two lines
Click here to see answer by mananth(16946)

Question 564782: A water tanker is used to fill a community pool. The tanker pumps 750 gallons of water per hour. Write a linear funtion that describes the amount of water in the pool over time. Then make a graph to show the amount of water in the pool over the first 6 hours.
Click here to see answer by stanbon(75887)

Question 564748: Micheal buys two bags of chips and three boxes of pretzels for $5.13. He then buys another bag of chips and two more boxes of pretzels for $3.09. Find the cost of each bag of chips and each box of pretzels.
Click here to see answer by ad_alta(240)

Question 564702: How to solve -5x+12=-x-9
Click here to see answer by ad_alta(240)

Question 564898: Determine the equation of a line parallel to 5x-3y+9=0 and passes through(3,-2)
Click here to see answer by lwsshak3(11628)

Question 565042: Write an equation of the line parallel to the line given by 3x-2y=8 and having the same y-intercept as the line giving by 2x+3y=_4
Click here to see answer by stanbon(75887)

Question 565055: how do you write an equation for the vertical line that passes through (2,4)?
Click here to see answer by nyc_function(2741)

Question 565085: i need to graph an equation for: y=1/3x
Click here to see answer by jim_thompson5910(35256)

Question 565033: write the equation of the line containing the given point and perpendicular to the given line (0,9); 6x+5y=3
Click here to see answer by scott8148(6628)

Question 565120: i need to solve for y and x . i dont quit understand it.here is the problem 7y+15=3x ,15=3x+2y . this is one problem the teacher said i have to combine them.to find y and x
Click here to see answer by stanbon(75887)

Question 565273: Find the equation of the line that passes through the point (1,-2) and is perpendicular to the line passing through the points (-2,-3) and (4,3)
Click here to see answer by mananth(16946)

Question 565299: Hi, can i please get some steps on how to do this question: Find the value of "k" if the line y=-5/2x +2 is perpendicular to this line 4x+ky=7
Click here to see answer by Theo(13342)

Question 565504: y-8=0 I need to put it in a graph
Click here to see answer by stanbon(75887)

Question 565504: y-8=0 I need to put it in a graph
Click here to see answer by josmiceli(19441)

Question 565508: John is presently 12 years older than Joseph. Four years ago John was twice as old as Joseph. How old is each now?
Click here to see answer by josmiceli(19441)

Question 565494: solve for r:
S= rL-a/r-1
Click here to see answer by ad_alta(240)

Question 565545: A farmer plans to enclose a rectangular field, whose length is 16 meters more than its width, with 140 meters of chain-link fencing. What are the dimensions of the field?
Click here to see answer by Leaf W.(135)

Question 565542: The perimeter of a rectangle is 36 meters. If the width is 3 times the length, find the demensions?
Click here to see answer by ad_alta(240)

Question 565540: A resort guarantees that the average temperature over the period Friday, Saturday, and Sunday will be exactly 80 degrees F, or else each quest pays only half price for the facilities. If the Temperatures on Friday and Saturday were 90 degrees F and 82 degrees F respectively, what must the temperature be on Sunday so that the resort does not lose half of its revenue?
Click here to see answer by Alan3354(69443)

Question 565541: I have to graph y=4x with the formula y=mx+b. I get every other problem but this one is just just won't click to my brain! Help me out please?
Click here to see answer by lwsshak3(11628)

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