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

Tutors Answer Your Questions about Graphs (FREE)

Question 106441: Are the following lines parallel, perpendicular or neither?
L1 through (9,2) and (3,-8)
L2 through (-3,5) and (5,-1)
m1= -8-2 = -6 = -1
3-(-9) 12 2
m2 = -1-5 = 4 = 1
5-(-3) 8 2

The lines are perpendicular
Click here to see answer by solver91311(24713)

Question 106440: Are the following lines parallel, perpendicular or neither?
L1 with equation x-3y = 9
L2 with equation 3x+y = 3
Click here to see answer by scott8148(6628)

Question 106437: Find four solutions for the equation 3x + 5y = 15. I don't know if I did my solutions right and if they make sense.

3(3) + 5y = 15
9 + 5y = 15 Solution is (3,1)
5y = 6
y = 1

3x + 5(0)= 15
3x + 0 = 15 Solution is (5,0)
3x = 15
x = 5

3(0) + 5y = 15
5y = 15 Solution is (3,0)
y = 3

3x + 5(6) = 15
3x + 30 = 15 Solution is (6,-3)
3x = -15
x = -5
Click here to see answer by Fombitz(32388)

Question 106471: Graph each of the following inequalities. 3x-4y<12
Click here to see answer by stanbon(75887)

Question 106462: I have gone on-line and found some free calculators for graphing and have been able to copy some graphs to my homework. As a student, I have limited financial resources to pay for this better, and more complex calculators. On this particular problem I am working on now, there are three systems of inequalities that I need to graph the feasible region for: -2 < x < 2, y > 1, x � y > 0 . Can you help me graph this please?
Have you any thought as to how, and what calculator(s), that I can input more than two systems on a graph? If you can help, I sure would be thankful.

Click here to see answer by stanbon(75887)

Question 106517: GRAPH THE FOLLOWING INEQUALITY:
4X+Y>4 (THERE IS A LITTLE LINE UNDER THE >)
Click here to see answer by stanbon(75887)

Question 106583: plot each line and form triangle abc
verify that it is a right angle
a=(-6,3) b=(3,-5) c=(-1,5)
Click here to see answer by ashlyn.xo(7)

Question 106569: |g+6|>-8
Click here to see answer by edjones(8007)

Question 106658: Solve the system by addition
-3x+4y=-6
x-2y=12
Click here to see answer by stanbon(75887)

Question 106664: Given f(x) = x2 � 2x + 6, find f(0).
Click here to see answer by stanbon(75887)

Question 106665: Given f(x) = x2 � 2x + 6, find f(0).
Click here to see answer by Earlsdon(6294)

Question 106668: my problem is I need to find the domain and range for f(x)=The Square Root of
25-(X^2)....all terms are under the square root symbol. ALSO where can I see if its increasing or decreasing?
Click here to see answer by edjones(8007)

Question 106639: 20. Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = �3x + 1.
A) y = �3x + 5
B) y = x + 5
C) y = 3x + 5
D) y = � x + 5

Click here to see answer by elima(1433)

Question 106651: Graph the following system 2x+y=8 and 2x-y=0. Thank you
Click here to see answer by elima(1433)

Question 106652: Given f(x)=-x^3+x^2+3x+4, find f(-1), f(0), and f(1).
Click here to see answer by elima(1433)

Question 106663: Bob invested $21,000, part at 18% and part at 8%. If the total interest at the end of the year is $1,980, how much did he invest at 18%?
Click here to see answer by elima(1433)

Question 106678: The sum of two numbers is 94. The second is 6 more than 3 times the first. What are the two numbers?
Click here to see answer by elima(1433)

Question 106767: how do i solve this equations by graphing it?
and how do i put it in my calculator to solve and graph it?
3x-6y=9
Click here to see answer by stanbon(75887)

Question 106813: Given the equation y = -2x +3 make a table. x equals -1, therefore y = 5. If x equals 0, y equals 3. Finally, if x equals 1, then y equals 1. Am I correct?
Click here to see answer by HyperBrain(694)

Question 106121: graph and classify
{y=x+4
{y+x=4
Click here to see answer by HyperBrain(694)

Question 106851: You now have had practice solving equations with one variable and equations with
two variables. Compare equations with one variable to equations with two variables.
How are they alike? How are they different?

Click here to see answer by MathLover1(20849)

Question 106868: 2x-5y=10
Click here to see answer by tutorcecilia(2152)

Question 106945: A credit manager rates each applicant for a car loan on a scale of 1-5 and then deterines the interest rate. Find the equation of a line in slope-intercept form that goes thru these points.
Credit Rating Interest Rate
1 24
2 20
3 16
4 12
5 8
Click here to see answer by cheesey(22)

Question 106997: Find the slope-intercept equation of the line that passes through the point (1,5) and has slope -1
Click here to see answer by HyperBrain(694)

Question 106995: Find the slope of the line: y + 4= -1/2(x+3)
Click here to see answer by HyperBrain(694)

Question 106993: Find the standard form of the equation of the line with slope = undefined, passing through the point(-8,3)
Click here to see answer by scott8148(6628)

Question 107069: solve each system by graphing
3x-6y=9
x-2y=3
Click here to see answer by HyperBrain(694)

Question 107068: solve each system by graphing:
x-2y=8
3x-2y=12
Click here to see answer by HyperBrain(694)

Question 107067: solve each system by graphing
2x-y=4
2x-y=6
Click here to see answer by HyperBrain(694)

Question 107022: state the doamin of the following?
a) l(x)=2x+3
Click here to see answer by Annabelle1(69)

Question 105955: How do you graph 3x = 48?
Click here to see answer by HyperBrain(694)

Question 107344: I am really stumped.
The question is Find the x coordinate ofthe vertex of this parabola. f(x)=X^2+4x+1
(x+4)(x+1)+1=x
I am sorry I just got a mind block I really can't see it
Thank You

Click here to see answer by scott8148(6628)

Question 107241: 2x+y is less than or equal to 6
y is greater than 2x
x-2y is greather than 0
please helpppp
Click here to see answer by elima(1433)

Question 107273: a small firms produces both AM AND AM/FM car radios. The AM radio takes 15h to produce and the AM/FM radio takes 20h to produce. The number of production hours is limited to 300 h per week. The plant's capacity is limited to a total of 18 radios per week, and existing orders require that at least 4 AM radios and at least 3 AM/FM radios be produced per week. Write a system of inequalities representing this situation. Then draw a graph of the feasible region give these conditions, in which x is the number of AM radios and y the number of AM/FM radios
Click here to see answer by ankor@dixie-net.com(22740)

Question 107357: I really need help with this problem. will someone please help me? I think I left a number out of this problem earlier. y=-1/3x+2
Click here to see answer by brandombe(4)

Question 107407: 2x-y=2
Click here to see answer by Annabelle1(69)

Question 107470: Can you please help me with this one.

Consider the function f(x)=x^2+4x+1.
a) Find h, the x-coordinate of the vertex of this parabola.

I got the answer to be -2
Thank You

Click here to see answer by edjones(8007)

Question 107356: I really need help with this problem. will someone please help me? I think I left a number out of this problem earlier. y=-1/3x+2
Click here to see answer by edjones(8007)

Question 107476: How do I graph the following line? Through (-4,-1) with m=3. So far I have gotten- Y-y1=m(X-x1) Y--1=3(X--4) Y+1=3x+12 -3x+y=12-1 -3x+y=11 y=3x+11. This is where I get stuck.
Click here to see answer by stanbon(75887)

Question 107507: use the graph to decide whether the point lies on the graph of the line. justify your answer algebraically. 12. 3x-4y= 10
a. (2,-1)
b.(-1,2)
Click here to see answer by solver91311(24713)

Question 107525: 2x-3y=6
Click here to see answer by jim_thompson5910(35256)

Question 107557: Please help me with this problem I need to put this answer on a a graph:y= -2x+ 5
Click here to see answer by stanbon(75887)

Question 107588: Please help me solve this equation
Click here to see answer by checkley71(8403)

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