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

Tutors Answer Your Questions about Graphs (FREE)

Question 192237: a line in the Cartesian plane passes through the points (-2,4) and (2,-1). what is the rise and the run of the line? I got run is4 and rise is 5 is it corect?
Click here to see answer by solver91311(24713)

Question 192293: I need to know how to graph the inequality 4y+x>-1 I have been trying for about 40 minutes to figure out how to get the x to the other side. I tried subtract x both sides. Then I divided both sides by four. I came up with
y>.25-.25x. I think this is the correct answer so far by I am stumped on what to do with the x. Vicktoria Murphy
Click here to see answer by stanbon(75887)

Question 192334: Can you please solve for x and graph the solution?
9x+3<6x-3
Thank you so very much!
Click here to see answer by Mathtut(3670)

Question 192327: The question is determine the equation of each line. The line through (-2, 4)that is perpendicular to the x-axis?
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Question 192421: graph y=3* *=x
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Question 192432: Please help me solve this equation: y= 2x+3 y= -1/2x-2
Click here to see answer by edjones(8007)

Question 192492: im trying to help my daughter with her homework and Im stuck myself this is the problem when x = o
y=x-1
y=( )-1
y=( )+(-1)
y=( )
Click here to see answer by edjones(8007)

Question 192574: Please assist with the below problem:
Suppose y varies directly as x and that y = 21 when x =3. Find the value of y when x = 5
Click here to see answer by Mathtut(3670)

Question 192574: Please assist with the below problem:
Suppose y varies directly as x and that y = 21 when x =3. Find the value of y when x = 5
Click here to see answer by solver91311(24713)

Question 192742: Solve the system of equations by graphing
3x-2y=-6
-3x- y=-12
Use the graphing tool to graph the system , If both equations yield the same lines graph the line twice.
What is the solution of the system?
Thanks
Jean
Click here to see answer by Alan3354(69443)

Question 192737: Hi, I'm not sure if I should be in this section, but here I am. We are studying compound inequalities etc... in my class right now. My question is a word problem that I don't even know where to start. Can someone please help me?
The body mass index, I, can be used to determine an individual's risk of heart diease. An index of 25 indicates low risk. The body mass index is given by the formula, or model, I=700W/H^2, where W= weight and H = height, in inches. Francis weighs 189 pounds and stands 68 inches tall. What is his approximate body mass? Find an inequality describing all weights W that Francis can have and be in the low risk category. Thank-you for any help.
Click here to see answer by stanbon(75887)

Question 192958: Can someone help me? This is what we're studying this week. I thought I was confused before. I'd appreciate any help, Please.
In order to acheive maximum results from aerobic exercise, one should maintain one's heart rate at a certain level. A twenty-five year old woman with a resting heart rate of 80 beats per minute should keep her heart rate between 149 and 172 beats per minute while exercising. She checks her pulse for 10 sec while exercising. What should the number of beats be? The number of beats in 10 sec should be between_and_ beats. Round to the nearest whole number. After basic math and now algebra that still confuses me :( Thank-you for your help.

Click here to see answer by stanbon(75887)

Question 192961: y=1/4x help me the way
Click here to see answer by jim_thompson5910(35256)

Question 192995: Solve by the elimination method.
6x-9y=13.5
7y-3x=-8
Click here to see answer by stanbon(75887)

Question 193025: Can I please get some help with something? I thought I would be able to answer this without help but I guess I was wrong. I need to describe what the graph of interval [-4,10] looks like. I would be really greatful, this is my last problem. Thank-you
Click here to see answer by user_dude2008(1862)

Question 193065: I know this is a lot to ask but I really need some help. I don't get this at all.
1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city.
a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x to represent floor plan #1 and y to represent floor plan #2. Write an equation that illustrates the situation.
b) The sales representative later indicates that there are 3 times as many homes available with the second floor plan than the first. Write an equation that illustrates this situation. Use the same variables you used in part a.
c) Use the equations from part a and b of this exercise as a system of equations. Use substitution to determine how many of each type of floor plan is available. Describe the steps you used to solve the problem.
d) What are the intercepts of the equation from part a of this problem? What are the intercepts from part b of this problem? Where would the lines intersect if you solved the system by graphing?
Thank-you for any help you can be, I'd be grateful.
Click here to see answer by jim_thompson5910(35256)

Question 193145: Hi..
My question is ..

In one day a ticket agent sold 395 tickets to the circus. A child ticket cost $22 and an adult ticket cost $28. The total amount collected that day was $10,130. How many of each type of ticket did the agent sell that day?

well I did..
22 c+28 a=10130
c+a=395 ___ but i changed it into..c=395-9
I dont know if this is right
But i was trying use the substitution method ..
will you help me..
to find the answer

Click here to see answer by Earlsdon(6294)

Question 193154: write three ordered pairs for the linear equation x=-25
Click here to see answer by stanbon(75887)

Question 193173: Graph the equation and identify the y-intercept
y=5x-7
Click here to see answer by Alan3354(69443)

Question 193159: Hello.
I'm needing some help with the following problem and checking my answers.
f(x) = -(x+1)^2 + 3
thanks!
Click here to see answer by Mathtut(3670)

Question 193183: This is what were studying this week although this doesn't seem like that kind of question but I sent it here any way. Hope it's ok. I'd appreciate any help I can get with this, wherever it goes. Than-x
The perimeter of a rectangle is 244 inches. The length exeeds the width by 42 inches. What is the length in inches? What is the width in inches?
Click here to see answer by josmiceli(19441)

Question 193194: Can someone please help me. I am pulling my hair out. What does this question mean and how do you do it? What does this thing look like?
Create a graph with precisely two odd vertices and two even vertices. State which of your vertices are even and which are odd. Use a dot and letter to mark each vertex.

Click here to see answer by jim_thompson5910(35256)

Question 193238: graph y<-1/4x-2
Click here to see answer by stanbon(75887)

Question 193269: write slope intercept form of the equation of a line passing through (-4,3) and perpendicular to line whose equation is y=1/3x-4
Click here to see answer by jim_thompson5910(35256)

Question 193268: can you please help me solve -2x + 5y = 15 i did -2 * 0 + 5y = 15 0 + y = 15 y = 15
Click here to see answer by RAY100(1637)

Question 193498: How many solutions exist for a quadratic equation? How do we determine algebraically whether the solutions are real or complex?
Click here to see answer by Mathtut(3670)

Question 193499: What three techniques can be used to solve a quadratic equation? Demonstrate these techniques on the equation "x2 - 10x - 39 = 0".

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Question 193515: Create a graph with five vertices, no bridge, and a loop. Please help.
Carrie
Click here to see answer by jim_thompson5910(35256)

Question 193607: If the sum of a number and 8 is decreased by 48, the result is 64. Find the number
Click here to see answer by RAY100(1637)

Question 193613: 6x-3y=12
1. Solve it for y.
2. Identify the slope.
3. Identify the y-intercept.
Click here to see answer by Mathtut(3670)

Question 193612: Use the y-intercept and the slope to graph the line described by the equation y-2/3x+3
Click here to see answer by Mathtut(3670)

Question 193604: Write the slope intercept form of the equation: A line passing through the point (2,-5) and with slope m=6
Click here to see answer by Mathtut(3670)

Question 193582: The graph of y=-3/4 + 1 is shown if the line in the graph is shifted up 2 units, wich is the equation of the new line?
Click here to see answer by Mathtut(3670)

Question 193615: Given the two points(4,6) and (8,18):
1. Calculate the slpoe.
2. Write the point-slope form of the line through the two points.
3. Use the answer to #9 to write the equation in slope-intercept form.
Click here to see answer by Mathtut(3670)

Question 193623: How many gallons of a 4% acid solution should be mixed with 20 gallons of a 10% acid solution to obtain a mixture that is 5% acid?
Click here to see answer by stanbon(75887)

Question 193625: Determine whether the lines through each pair of points are parallel. Thell how you determined the answer.
(0,1) and (3,7)
(1,1) and(2,3)

I got that they were parallel
Click here to see answer by Mathtut(3670)

Question 193811: Dear Tutor
I am having a real problem with graphs. Could you please help?

y=square root x-4
Click here to see answer by Alan3354(69443)

Question 193815: Dear Tutor,
I am getting so many different answers with this...Please help!
Direction is solve the system of equations
Solve for x only
4x + 2y + z = 24
2x - 3y - z = 2
5x + y + 2z = 21
Click here to see answer by scott8148(6628)

Question 193818: Dear Tutor
I'm not sure if I did this correctly. Direction is factor completely
15z^2 - 2z -8
I did 5*3(2-4)(2+4)
Click here to see answer by scott8148(6628)

Question 193821: Hi Tutor
I'm not completely sure about this problem.
x^3-2x^2+9x-18
The direction is factor by grouping. Do I just subtract and add just as writen?
I would appreciate your help.
Click here to see answer by solver91311(24713)

Question 193816: Dear Tutor,
I'm not sure if I have stated this correct for this problem.
Direction is state the domain of the given function.
f(x)= 1/x+2
I put x not= -2
Click here to see answer by solver91311(24713)

Question 193902: Hi tutor,
This is a problem I'm having trouble with.
7x-4y=17
2x-2y=8
The directions is solve by elimination by addition or subtraction. Please help!
Click here to see answer by josmiceli(19441)

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