Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 80347: whay is the point of doing this if we will never use it in life unlss you are going to be a mathamatition
Click here to see answer by scott8148(6628)

Question 80344: Write the equation of the line passing through (-2,5) and (1,3). Answer must be written in slope intercept form. HELP ME!!! ;0(
Click here to see answer by Edwin McCravy(20055)

Question 80353: If P(4, -5) is a point on the graph of the function y=f(x), find the corresponding point on the graph of y=2f(x-6).
Click here to see answer by stanbon(75887)

Question 80343: slope: -3/4;y intercept:(0,8)...How in the world do I figure this out?Help me PLEEEASE...Thank You
Click here to see answer by checkley75(3666)

Question 80302: Are the following pairs of lines parallel, perpendicular, or neither?
L1 with equation x+2y=4
L2 with equation 2x+4y=5
Click here to see answer by scott8148(6628)

Question 80519: How do I find the slope of the line passing through points (3,4) and (3,-4)? My solution is 0..am I right?
Click here to see answer by Earlsdon(6294)

Question 80517: How do I graph 3x+2y=6?
Click here to see answer by E86(1)

Question 80515: What are the ordered pairs as a solution to the equation 3x-2y=6?
I have (2,-3) am I right?
Click here to see answer by Earlsdon(6294)

Question 80516: What is the plot of the point with coordinates (-4,3)?
Click here to see answer by Edwin McCravy(20055)

Question 80514: How do I graph x=3?
Click here to see answer by Edwin McCravy(20055)

Question 80532: find an equation for the line with y-intercept 3 that is perpendicular to the line y=2/3x-4.
Click here to see answer by tutorcecilia(2152)

Question 80530: Writed the equation of the line passing through each of the given pairs of points. Write the result in slpe-intercept form, where possible
(-1,3) and (4,-2)

Writed the equation of the line passing through each of the given pairs of points. Write the result in slpe-intercept form, where possible
(2,-3) and (2,4)
Click here to see answer by jim_thompson5910(35256)

Question 80644: Not sure if this is the right area, but could use some help. thank you for your time
The table below shows the frequency distribution for 12 students on a test with a maximum score of 20. Use these sample data to answer questions 5 through 7:
Score Frequency Midpoint Midpoint x Frequency Midpoint squared x Frequency
1 - 5 5
6 - 10 3
11 - 15 2
16 - 20 2

Totals
______5. The mean score, , of the data in the frequency distribution above is (to the nearest 1/10)
a. 8.0 b. 8.4 c. 8.7 d. answer not listed
______6. The standard deviation of the scores in the frequency distribution above is (to the nearest 1/10)
a. 5.0 b. 5.3 c. 5.8 d. answer not listed
_____7. The median score lies in which score interval?
a. 1 � 5 b. 6 � 10 c. 11 � 15 d. 16 - 20
thank you for your help David
Click here to see answer by stanbon(75887)

Question 80664: Solve the system by graphing
x + y = 3
x + y = -1
Click here to see answer by stanbon(75887)

Question 80640: Write the equation of the line with slope 5 and y intercept (0,-3)
Click here to see answer by rapaljer(4671)

Question 80689: I've been trying to figure a few of these equations all day, but I can't seem to understand the how to find the slopes and graphs and I'm getting more homework than I can keep up with. Also is there a more simple explanation of how to find whether points are parallel or perpendicular? Is there a way I can get some one on one tutoring, either from here or another program?
-find the slope of any line perpendicular to the line through points (0,5) and
(-3,-4)
-Floor plans for a building have the four corners of a room at the points (2,3),(11,6),(-3,18) and (8,21).
Determine whether the side through the points(2,3) and (11,6) is perpendicular to the sides through the points (2,3) and (-3,18).
Click here to see answer by jim_thompson5910(35256)

Question 80639: Find the slope of the line passing through points (11,20) and (8,2)
Click here to see answer by jim_thompson5910(35256)

Question 80654: Given f(x)= -5x -1, find f(a-1).
Click here to see answer by praseenakos@yahoo.com(507)

Question 80717: Find the slope of any line parallel to the line through points (18,3) and (6,4)
How do I do this? Please help ;0/
Click here to see answer by josmiceli(19441)

Question 80719: How do I find the slope of the line passing through the points
(-9,-1) and(-2,-1)? My answer is 7, am I right?
Click here to see answer by Earlsdon(6294)

Question 80716: How do I write the equation of the line passing through (3,10) and (3,-3)
Click here to see answer by Earlsdon(6294)

Question 80715: How do I find out if the following lines are perpendicular, parallel or neither?
L1 through (-4,-7) and(1,3)
L2 through (2,6) and (4,10)
Click here to see answer by Earlsdon(6294)

Question 80781: Solve the system by graphing.
x + y = 3
x + y = -1

Click here to see answer by checkley75(3666)

Question 80637: Find the slope of the line passing through the points (-9,-1) and (-2,-1)
Click here to see answer by checkley75(3666)

Question 80779: Solve the system by graphing.
x � 2y = 8
x + y = -1

Click here to see answer by daniellagirl89(3)

Question 80826: I need help on how to graph a liner equation and how to determine it's slope.
y=3/4x-4.
Thanks!!
Click here to see answer by stanbon(75887)

Question 80854: Here is the question as stated (this is not from a textbook, and I can't find an explanation for a problem like it in any textbooks I have):
"Write an equation in standard form for the line parallel to x - 2y + 7 = 0 and contains the point (-4,0)."
I am just unsure how to solve this problem. I have converted problems from slope intercept form to standard, and standard to slope intercept, but there hasn't been an extra component (like the +7 in this one.) I am also not sure how to do this when I only have one set of coordinates. I tried figuring out the value of x and the value of y by (if x=0 then y=?, and if y = 0 then x=?) but I have two problems. One is, the numbers I get (x= -7 and y= -7/2) don't make the problem true. And even if they did, I don't know how to use them to help me make the original equation a line parallel to another point. Help!
Click here to see answer by stanbon(75887)

Question 80938: The problem I have--not from a text book--is this:
"Draw the graph of the linear function n(x) = 0"
On this one, I am totally lost. Other than understanding there is a "0" point on the y axis, I don't know what I am supposed to do. Help!
Click here to see answer by bucky(2189)

Question 81080: Use elimination to solve each system of equations.

Find the two numbers whose sum is 51 and whose difference is 13.
Click here to see answer by Mathwiz101(4)

Question 81134: If Greg buys gas at $2.99 per gallon. And uses 60 gallons of gas per week, how much would he pay for gas per year?
How would write this in equation form? Then how would I graph the equation for this?
PLEASE HELP?
Click here to see answer by checkley75(3666)

Question 81102: Write the equation of the line with slope -1/2 and y-intercept (0, 3).
Click here to see answer by checkley75(3666)

Question 81077: Use elimination to solve each system of equations.

13a+5b=-11
13a+11b=7
Click here to see answer by stanbon(75887)

Question 81142: L has intercept (0,2) and is perpendicular to the line with the equation 2x-3y=6 This equation has to be written with the equation of the line L satisfying the given geometric condition. This equation makes absolutly no sense.
- In planning for a new item, a manufacturer assumes that the number of items produced is x and the cost in dollars C of producing these items are related by a linear equation. Projections are that 100 items will cost $10,000 to produce and that 300 items will cost $22,000 to produce. Find the equation that relates C and x.
Thank you if you can help!!!
Click here to see answer by stanbon(75887)

Question 81146: The boundary line of y>3 is graphed, how do I determine the correct half-plane and complete the graph?
Click here to see answer by scott8148(6628)

Question 81200: y=9-x^2. Find vertex and graph.
Click here to see answer by jim_thompson5910(35256)

Question 81199: Graph y=3x^2-5x-9. Also find the vertex
Click here to see answer by Edwin McCravy(20055)

Question 81293: a radio beacon is located at (-1, 0), and another at (2, -1). A navigator's equipment tells her that the line joining her position to the first beacon has slope -5 and the line joining her positon to the second beacon has slope 3. What is the navigator's approximate location?
Click here to see answer by stanbon(75887)

Question 81298: I have to graph this and I am not sure how?
Graph the solution set of x < �5.

Click here to see answer by stanbon(75887)

Question 81246: Can you transform the inequality into an equivalent inequality with y on one side and then graph it.
2x+y>-4
Click here to see answer by ankor@dixie-net.com(22740)

Question 81244: Can you graph the inequality.
y≥1-3x

Click here to see answer by stanbon(75887)

Question 81251: use thw slope intercept to graph the equation y=(3/5)x-2
Click here to see answer by checkley75(3666)

Question 81465: I'd really appreciate some help with my algebra, my middle school teacher just confuses me:( Here's the equation:
find the line that passes through (-5,10), (0,5), and (5,-20), find the following:
what is the slope of this line?
what is the y intercept of this line?
what is the equation of this line?
find x when y = 24
Click here to see answer by stanbon(75887)

Question 81463: I'd really appreciate some help with my algebra, my middle school teacher just confuses me:( Here's the equation:
find the y intercept and x intercept if y=2x-5
Click here to see answer by scott8148(6628)

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