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

Tutors Answer Your Questions about Graphs (FREE)

Question 621504: I graphed y=2x and 2x+y=4 but I need some help, it's now says indicate the method you used to plot the lines and show your work?
B. check by substiting the answer back I to the original equation?
Please i need some help don't understand it!
Click here to see answer by Alan3354(30993)

Question 621635: Would you pls help me with this?
Solve using quadratic formula: 6x^2 + 7x - 11 = 0
I started like this:

x= {-7+-sqrt(7^2-4*66)}/ 12
I would like to know how to do it step by step because I want to be able to do the others by myself.

Thanks a lot.

Click here to see answer by vleith(2825)

Question 621622: Would you pls help me with this;
Solve using quadratic formula: 6x^2 + 7x - 11 = 0
I started like this:
x= {-7+-sqrt(7^2-4*66)}/ 12
Thanks
Click here to see answer by ewatrrr(10682)

Question 621668: Could you pls check my answer?
Solve for z: |6z+30|= 48
My solution: z = 3 or z = -13
Thanks.

Click here to see answer by ewatrrr(10682)

Question 621670: What is the graph of f(x)=1/3(x-4)^2-1
Click here to see answer by ewatrrr(10682)

Question 621680: x-y=3
x+y=5
let,x=0
x-y=3
y=3
(0,3)
let,y=0
x+y=5
x =5
(5,0)

Click here to see answer by ewatrrr(10682)

Question 621652: Solve the systems of linear equations using graph paper
y = x - 2
x = 2
Click here to see answer by ewatrrr(10682)

Question 621643: Could you pls check my answer,
Solve for z:|6z+30|= 48
My solution: z = 3 or z = -13
Thanks.
Click here to see answer by ewatrrr(10682)

Question 621633: 3x - y =3
Click here to see answer by lynnlo(4164)

Question 621646: Solve the systems of linear equations.
y = 2x - 2
y = -x + 7
Click here to see answer by lynnlo(4164)

Question 621736: y=1/4X and x=-12 can i get help solving this and understand how to solver more questions like this?
Click here to see answer by ewatrrr(10682)

Question 621749: -1< or equal to 2x+1
Click here to see answer by ewatrrr(10682)

Question 621749: -1< or equal to 2x+1
Click here to see answer by Alan3354(30993)

Question 621749: -1< or equal to 2x+1
Click here to see answer by vleith(2825)

Question 621902: Would you pls help me with this:
For the function y = 3 + 2 sqrt(2x+4) State the domain.
I am not sure ?
Is it x>-2 or x >= -2
Thanks.

Click here to see answer by jim_thompson5910(28595)

Question 621957: Could you pls, help me with this?
Complete this linear function table:
( x , y)
(- 3 , - 1/3)
(- 1 , 1/3)
(2 , ? ) If x = 2 what should be y ?
(4 , 2)
( 5 , 2(1/3))
Thanks.
(This is the 3rd time that I am submitting this problem without receiving any answer: is it so difficult that no one could even try to solve it?)

Click here to see answer by vleith(2825)

Question 621988: Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2
Click here to see answer by nerdybill(6958)

Question 621988: Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2
Click here to see answer by ewatrrr(10682)

Question 622035:
Click here to see answer by Alan3354(30993)

Question 622119: I have no idea how to graph with a radical. I am not sure how to write this properly but it is basically f(x)= 2 times radical X.
2 isn't a part of the radical it is multiplied by it.

Click here to see answer by jim_thompson5910(28595)

Question 622148: solve the inequality
Click here to see answer by matineesuxxx(27)

Question 622148: solve the inequality
Click here to see answer by lwsshak3(6505)

Question 622275: how do you graph y=20x+400
and y=10x+600
Click here to see answer by solver91311(16885)

Question 622275: how do you graph y=20x+400
and y=10x+600
Click here to see answer by josmiceli(9678)

Question 622276: How do you find a relevent quadrant, when you are graphing on a one-quadrant graph. The points are A(5,500)(10,600)(15,700)(20,800)(25,850)(30,900)
B (5,650)(10,700)(15,750)(20,800)(25,900)(30,1000)
Click here to see answer by solver91311(16885)

Question 622113: Graph this equation
y=-2/x+5/+2
Click here to see answer by math-vortex(472)

Question 622253: how do you find out what line is passing through the point (-2, -3) with a slope of -6.

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

Question 622280: Would you pls help me with this?
Solve for y in this equation:
x=(x + 1)(x + y)
I started like this:
x=x^2+xy+x+y
x^2+xy+y=0
Thanks
Click here to see answer by solver91311(16885)

Question 620287: you invest $300 and 5% compound for 4 years. how much do you have in the account after 4 years and how much intrest did you earn?
Click here to see answer by babs1010(6)

Question 622597: how do you graph y=-x^3+7
Click here to see answer by lynnlo(4164)

Question 622712: (-1, y) is on the graph, then y =
Click here to see answer by Alan3354(30993)

Question 622788: Write the equation of the line which passes through (2, 1) and is perpendicular to x = –2.
Click here to see answer by Alan3354(30993)

Question 622788: Write the equation of the line which passes through (2, 1) and is perpendicular to x = –2.
Click here to see answer by ewatrrr(10682)

Question 622870: 2x+y=36
Click here to see answer by Alan3354(30993)

Question 622870: 2x+y=36
Click here to see answer by lenny460(770)

Question 622897: 2x + 3y = 1
Click here to see answer by asuar010(324)

Question 622897: 2x + 3y = 1
Click here to see answer by lenny460(770)

Question 622842: Please help (:
Graph the two equations to solve the system. What is the solution?
y = 2x - 4 and 2x + 3y = -12
Click here to see answer by math-vortex(472)

Question 622952: What is the slope using the elimination method!
5x -3y =8
-5x + y =4
Thank you advance....
Click here to see answer by lynnlo(4164)

Question 622951: 2x -3y=12
4x +y =10
Click here to see answer by lynnlo(4164)

Question 622942: what is the solution set of:
x+y=3
x-y=-1
and what is the sol set of
3x=y+2
x=y+4
Click here to see answer by ewatrrr(10682)

Question 623017: Two of the top-grossing concert tours were by a jazz band and a rock band. Together the two tours visited 169 cities. The jazz band visited 91 cities more than the rock band.
How many cities did the jazz band visit?
Click here to see answer by lynnlo(4164)

Question 623012: (7x+4)(3x+9)
Click here to see answer by lenny460(770)

Question 623146: Find the equation of the line that passes through two points (1,-2) and (-3,4). Write your answer in standard form Ax + By = C where A,B, and C are real numbers.
Click here to see answer by lwsshak3(6505)

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