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

Tutors Answer Your Questions about Graphs (FREE)

Question 28155: Solve the system by substitution.
2x + 4y = 10
y = 2x + 15

Click here to see answer by sdmmadam@yahoo.com(530)

Question 28153: Solve the system by addition or substitution.
3x – 4y = 8
6x – 2y = 10

Click here to see answer by sdmmadam@yahoo.com(530)

Question 28320: Solve the system by graphing.
x + y = 3
x + y = �1

Click here to see answer by imthebestdude(2)

Question 28321: Solve the system by addition.
4x – 4y = 9
8x + 2y = –7

Click here to see answer by sdmmadam@yahoo.com(530)

Question 28355: i have alot of problems with graphing and learning how to do all of the extra stuff that goes with graphing, i was just wondering if you could please just help me better to understand it... im in 9th grade algebra 1. i am struggling to keep up my grade i am failing... with a 54 and i really need to bring it up so i dont have to take summer school... i am having some other diffuculty too because this whole year ive been doing bad in algebra 1, but last year i did really good in math, and all of the other years from k-8th grade i have always done really good in math keeping a 90 or better for the whole year. But this year for some reason i cant even keep it passing. i was also seeing if you could recommend anything that will be able to help me... i think that if i can start bringing up math then i can start bringing up everything, because i believe that math is the most important in school to learn because you use math everyday in whatever you do... if you could please help me it will be very appreciated

thank you,
Brittney Campbell
Click here to see answer by elima(1433)

Question 28393: find the slope of (0,0) (-6,2)
Click here to see answer by sdmmadam@yahoo.com(530)

Question 28440: Given f(x) = x2 + 3x � 5, find f(0).
-5
Did I do this right. Can you show me the steps

Click here to see answer by longjonsilver(2297)

Question 28445: Rewrite the equation 2x � 3y = �6 as a function of x
Im lost here can you help

Click here to see answer by longjonsilver(2297)

Question 28434: Find the mean and the median.
�2, -1 2/3, 2/3, 4, 9
Mean = �2, -1 2/3, 2/3, 4, 9 / 5 = 2
Median = 2/3, 4, 9, -1 2/3, -2 = 9
Is this right. Did I do it right

Click here to see answer by longjonsilver(2297)

Question 28433: Given g(x) = �2x � 5, find g (3a).
-6a-15
Did I do this right
Click here to see answer by longjonsilver(2297)

Question 28443: Solve the system by substitution.
x � 2y = 19
2x + 5y = �7

Click here to see answer by LilSkittleMd(119)

Question 28432: Solve the system by addition or substitution.
5x � 5y = 35
y = �7 + x

Click here to see answer by LilSkittleMd(119)

Question 28518: What is the length of AB in the graph....I can give the coordinates..
B is -1,-3
A is 4,5
Answers are:
1) 53
2) 53 sqrt 2
3) 2 sqrt 53
4) sqrt 106
Thank you!
Click here to see answer by venugopalramana(3286)

Question 28435: Solve the system by graphing.
x + y = 3
x + y = �1

Click here to see answer by elima(1433)

Question 28439: Solve the system by graphing.
3x + y = 6
3x � y = 0
Click here to see answer by elima(1433)

Question 28473: How do you graph the equation y=-4x?
Click here to see answer by elima(1433)

Question 28559: 2p - q = 8
1/3p + 1/4q = 3 not sure how to make the fractions to whole number
Click here to see answer by stanbon(75887)

Question 28669: Find all negative odd integers that satisfy the following inequality
-3x+1=<17

Click here to see answer by sdmmadam@yahoo.com(530)

Question 28665: Find all negative odd integers that satisfy the following inequality
-3x+1=<17
Click here to see answer by longjonsilver(2297)

Question 28678: 1. Solve the following system of linear inequalities by graphing.
x + 2y <= 3
2x � 3y <= 6

2. Solve the following system of linear inequalities by graphing.
3x + 4y <=12
x + 3y <= 6
x => 0
y => 0

Please help!

Click here to see answer by longjonsilver(2297)

Question 28612: I am having some serious problems understanding this part of my algebra course. Can you help me figure out this problem and maybe explain how you got the answer. Thanks for all of your help.
A budget line shows all of the different combinations of goods a person can buy with a given budget, B. If a given company has $500.00 to spend on 2 goods "a" and "b" and a= $50.00 and b= $10.00, graph the budget line using the equation ax + by = B
Click here to see answer by venugopalramana(3286)

Question 28758: with linear equations i have trouble graphing i only thing i can remember is y=mx+b i can get the x i just can't get the b i have trouble.
so how do you get the b in the equation?
Click here to see answer by Lal(16)

Question 28627: I am taking a college algebra class and am having some problems with linear equations and graphs. Here is a problem that I would desperatley like to see solved with an explaination of how you did it. Thanks so much, you folks are fantastic.
Straight line depreciation is a linear equation. The current value, "y" of a certain company's piece of equipment after "x" years is y = 30,000 - 1000x
a. Find the intial value of the equipment
b. Find the value after 4 years
c. Find the value after 6 years
d. Graph the depreciation line
Click here to see answer by emmychan(11)

Question 28835: can you please help me find the equation of the line parallel to the graph of 3x-y=5 that contains the point (-1,4) and show how you got the answer?
Click here to see answer by josmiceli(19441)

Question 28859: what is the equation of the line that passes through the points (-2,2)and (0,5)?
Click here to see answer by Lal(16)

Question 28846: please help...
using the point-slope formula, what is the equation of the line that passes through the points(1,5) and (0,0)
expalin how you got the answer
Click here to see answer by sdmmadam@yahoo.com(530)

Question 28830: heres my problem.
write equation of line described.
through (-8,-16), parallel to 7x-5y=-16
Click here to see answer by sdmmadam@yahoo.com(530)

Question 28879: 5x+3y=15
Click here to see answer by gLORIA SMITH(1)

Question 28947: I am trying to figure out how to solve this. I appreciate any help anyone can give me.

Y=1/2X + 2
Y= -X +5
Click here to see answer by stanbon(75887)

Question 28937: I have a graph that has a line through -2 on the y axis and 6 on the x axis. I need to find which equation is graphed?
A) x-3y=6
B) x+3y=6
C) 3x-y=6
D)x-3y=-6
I know it isnt D and also dont think its C? Can anyone assist?
Click here to see answer by askmemath(368)

Question 28968: a line that passes through the points (-2,4) and (2,-1). what are the rise and the run of the line? at first i got the answer: the run 4, the rise 5, but it wasn't right. now i think it's -4 and -5. am i right?
Click here to see answer by stanbon(75887)

Question 28975: a line that passes through the point (-1,3) has a slope of 2. find onother point on the line.
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29005: 1) 4x+2y= -3
2) -1/2+y=19x
3) 24x+y/2=3
4) 1/3y-4/3x=6
5) -2+0.3x=0.6y
6) -2y=5x+2
7) 7x-2y=0.2
in algebra were learning about SLOPE, i need to find the slope of each equation.
problems 1-7 are problems i cannot figure out please help me do the problems.
THANK YOU SO MUCH!!!
Click here to see answer by longjonsilver(2297)

Question 29016: Solve the system by graphing.
x � y = 2
3x � 3y = 6 x - y=2 x=6 y=4 6-4=2
I really have a hard time with this can you show me how this one is done because I have 10 to do and have no clue.
Click here to see answer by 6208096(1)

Question 29015: A student earns $0.65 for each mistake she finds in a text. Sketch (graph) the equation of direct variation.

I'm lost here can anyone help me
Click here to see answer by josmiceli(19441)

Question 29013: A roof rises 9.75 ft over a horizontal distance of 12.31 ft. What is the slope of the roof to the nearest hundredth?

Click here to see answer by wuwei96815(245)

Question 29020: Lets say that a consultant traveled 4 hours to attend a meeting. The return trip took only 3 hours because the speed was 3 miles per hour faster. What was the consultant's speed each way.
Click here to see answer by wuwei96815(245)

Question 28959: -2x>10
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29055: Solve for y. x + 5y = 20
Click here to see answer by QueenVoda(11)

Question 29051: Find the slope of the line passing through the points (�1, �8) and (�4, 4).

Click here to see answer by QueenVoda(11)

Question 29108: how do i change from slope intercept form to standard form please help
Click here to see answer by wuwei96815(245)

Question 29108: how do i change from slope intercept form to standard form please help
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29050: Find the slope of the line passing through the points (–4, 1) and (–4, 4).
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29049: Solve the system by addition
–4x + 5y = 1
x – 4y = 19

Click here to see answer by sdmmadam@yahoo.com(530)

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