Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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Tutors Answer Your Questions about Linear-equations (FREE)

Question 71668: I need help in solving the question:SOLVE THE LINEAR SYSTEM BY GRAPHING:
Y=3x + y
y=x-2
Click here to see answer by checkley75(3666) About Me 
Question 71800: Find the center and radius of the circle: (x-5)^2+(y+2)^2=7
a)center
b)radius
Click here to see answer by Nate(3500) About Me 
Question 71839: How do you put x=4y+3 and -2x+6y=-8 in standard form in order to solve using determinants?
Thank you
Click here to see answer by bucky(2189) About Me 
Question 71874: what is the defeniton of slope intercept form of an equation?
Click here to see answer by tutorcecilia(2152) About Me 
Question 71844: Please help me with this problem. I am not quite sure how to set it up.
A physician invests $24,000 in two bonds. If one bond yields 6% and the other yields 12 %, how much is invested in each if the annual income from both bonds is $1980?
Click here to see answer by tutorcecilia(2152) About Me 
Question 71905: hi I am stuck on this problem I will give you the problem then show you what I did so you can tell me where I made my mistakes. Thanks %28z%2B7%2F9%29%2B1=%28%282z%2B1%29%2F6%29%2F18
I did this...%28z%2B7%2F9%2B1%29%2A18=2z%2B1%2F6%2F18%2A18
18z%2B126%2F9%2B18=2z%2B1%2F6
2z%2B14%2B18=2z%2B1%2F6%2A6
12z%2B192-1=2z%2B1-1
12z%2B191=2z
12z-12z%2B191=2z-12z
191=-10z
z=-19.1
Looking forward to hearing from you.
Click here to see answer by bucky(2189) About Me 
Question 71905: hi I am stuck on this problem I will give you the problem then show you what I did so you can tell me where I made my mistakes. Thanks %28z%2B7%2F9%29%2B1=%28%282z%2B1%29%2F6%29%2F18
I did this...%28z%2B7%2F9%2B1%29%2A18=2z%2B1%2F6%2F18%2A18
18z%2B126%2F9%2B18=2z%2B1%2F6
2z%2B14%2B18=2z%2B1%2F6%2A6
12z%2B192-1=2z%2B1-1
12z%2B191=2z
12z-12z%2B191=2z-12z
191=-10z
z=-19.1
Looking forward to hearing from you.
Click here to see answer by jim_thompson5910(28598) About Me 
Question 71905: hi I am stuck on this problem I will give you the problem then show you what I did so you can tell me where I made my mistakes. Thanks %28z%2B7%2F9%29%2B1=%28%282z%2B1%29%2F6%29%2F18
I did this...%28z%2B7%2F9%2B1%29%2A18=2z%2B1%2F6%2F18%2A18
18z%2B126%2F9%2B18=2z%2B1%2F6
2z%2B14%2B18=2z%2B1%2F6%2A6
12z%2B192-1=2z%2B1-1
12z%2B191=2z
12z-12z%2B191=2z-12z
191=-10z
z=-19.1
Looking forward to hearing from you.
Click here to see answer by ankor@dixie-net.com(15660) About Me 
Question 71829: The difference of two numbers is 11. The second is 8 less than 2 times the first. What are two numbers?
Click here to see answer by bucky(2189) About Me 
Question 71940: -4 (2x - 3) = -8x + 5
Click here to see answer by bucky(2189) About Me 
Question 71885:
Click here to see answer by rmromero(383) About Me 
Question 71965: D = C-s/N (for s)
I have searched throughout the chapter for a process to solve this literal equation. I do not understand how to handle the fraction in the middle.
Click here to see answer by stanbon(57387) About Me 
Question 71963: i cank't figure out this problem after the third step. could you please give me an explanation with each step. this book is not good with explainig. it is just homework
2x-3y=7
y=3x-7 solve by substitution method
thank you very much
Click here to see answer by stanbon(57387) About Me 
Question 71975: All work needed to arrive at a correct answer. If it is not a question that requires work, you will need to provide a complete explanation of how you determined the correct answer. (Explanations for those problems not requiring work must demonstrate your understanding of the concept.)
The correct answer

The formula y = mx + b is a linear equation where m is the slope and b is the y-intercept. Solve the equation in terms of b.
Click here to see answer by Earlsdon(6287) About Me 
Question 71964: 2x-3y=7
y=3x-7 substitution equations
i am stuck please help
Click here to see answer by Earlsdon(6287) About Me 
Question 71985: Write an equation of a horizontal line passing through the two points (5,-1) and (4,-1). Do not use any spaces in your answer and show all work
SLOPE=(-1+1)/(4-5)
0/-1 REPRESENTS A SLOPE OF 0 OR AN HORIZONTAL LINE THROUGH Y=-1
Y=-1 IS THE EQUATION OF THIS LINE WITH A ZERO SLOPE THROUGH THE POINTS
(5,-1)(4,-1)
Thanks
Click here to see answer by checkley75(3666) About Me 
Question 71978: Which of the following is an equation of a line the passes through the point (-4, -2) and has a slope of 3

Answer:y + 2 = 3(x + 4)
I put into solver and was given a different answer. Can you show the work to arrive at problem?
Thanks

Click here to see answer by checkley75(3666) About Me 
Question 71996: i understand the work of the first part of the problem but idont understand the second part can you show me thanks
addition of linear equation
8x-4y=16
4x+5y=22







Click here to see answer by stanbon(57387) About Me 
Question 71884: Solve each of the following systems by graphing.
x - 2y = 8
3x - 2y = 12
Click here to see answer by elima(1433) About Me 
Question 72028: y=3x+2 Y=3x-4 solve system by graphing
Click here to see answer by bucky(2189) About Me 
Question 72045: about 5 hours ago i emailed in reference to a problem that was solved but i wrote back to ask how they got a particular part of the problem could i get a response i know you are busy and i understand. thanks
addition of linear equations
8x-4y=16
4x+5y=22
what i need to know is how they got multiply 2nd by 2 to get 3rd: 8x+10y=44 where did the 2 come from
Click here to see answer by bucky(2189) About Me 
Question 72059: The sum of n and three subtracted from twelve times n is the same as negative eleven plus the product of 2 and the difference of n and five.
Click here to see answer by stanbon(57387) About Me 
Question 72059: The sum of n and three subtracted from twelve times n is the same as negative eleven plus the product of 2 and the difference of n and five.
Click here to see answer by bucky(2189) About Me 
Question 72164: Do I make my own points in this problem?
Draw any line L1 with slope-1
What is the slope of any line perpindicular to L1 Draw any line L2 perpendicular tp L1
Click here to see answer by stanbon(57387) About Me 
Question 72117: How can I show an equations used for this solution.
Jill has $3.50 in nickels and dimes. If she has 50 coins, how
many of each type of coin does she have?
Click here to see answer by checkley75(3666) About Me 
Question 72034: A line goes through the points (5,-1) and (-6,4). Write the equation of the line in slope-intercept form and standard form.
Click here to see answer by pradhyumna.kumar@gmail.com(62) About Me 
Question 72200: linear systems by addition
i cannot figure this one out
3x-7y=13
6x+5y=7
Click here to see answer by rmromero(383) About Me 
Question 72213: using the slope formula find the slope using the coordinates (7,5) and (12,10)
Click here to see answer by pradhyumna.kumar@gmail.com(62) About Me 
Question 72185: I wasn't sure what to put this under.It says to 'rewrite each equation in slope-intercept form'. 4x+2y = 8
I know you are supposed to solve for y but after I got the 4x on the other side I didn't know if I was supposed to divide the 2 into the -4x or just the 8.I would really appreciate it if someone could help me?And also the website told me to put an ISBN number but the book I have is from an extension program so it doesn't have one
Click here to see answer by bucky(2189) About Me 
Question 72218: Find the equation of the line that goes through (1,-3) and is parallel to the line through y=-3x-5
Click here to see answer by rmromero(383) About Me 
Question 72216: Graph y=-x+1 using the slop and the y intercept
Click here to see answer by Sandacious(9) About Me 
Question 72243: Graph 2x+2y=4 by plotting points. The rule of thumb suggests plotting 3 points and then draw a line so plot at least 3 points . Draw an accurate and straight line through plotted points
Click here to see answer by rmromero(383) About Me 
Question 72243: Graph 2x+2y=4 by plotting points. The rule of thumb suggests plotting 3 points and then draw a line so plot at least 3 points . Draw an accurate and straight line through plotted points
Click here to see answer by stanbon(57387) About Me 
Question 72248: using the slope formula find the slope using the coordinates (11,2) and (5,12)
Click here to see answer by rmromero(383) About Me 
Question 72260: 0.3(z-10) - 0.5z =-6 I need the process more than anything - nothing seems clear. 1st get rid of parenths, then distrubute?
Click here to see answer by checkley75(3666) About Me 
Question 72259: 0.3(z-10) - 0.5z =-6 I need the process more than anything - nothing seems clear. 1st get rid of parenths, then distrubute?
Click here to see answer by stanbon(57387) About Me 
Question 72057: Write the equation of the line L satisfying the given geometric conditions.
L has y-intercept (0,-3)and is parallel to the line with equation y=2/3x+1
Click here to see answer by stanbon(57387) About Me 
Question 72257: I get it while shes doing it on the board. I get the math book examples, when it comes to the problems I freeze. It never looks the same as the examples X#$#@!
Click here to see answer by Sandacious(9) About Me 
Question 72302: Word problems are difficult for me. Here is example. Driving down a mountain, Bob finds that he has descended 1800 ft. in elevation by the time he is 3.25 mi. horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.
Click here to see answer by checkley75(3666) About Me 
Question 72302: Word problems are difficult for me. Here is example. Driving down a mountain, Bob finds that he has descended 1800 ft. in elevation by the time he is 3.25 mi. horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.
Click here to see answer by josmiceli(9697) About Me 
Question 72308: 1. The average depth of the gulf of Mexico is three times the depth of the red Sea. the difference between the average depths is 1078 m. what is the average depth of the gulf of mexico and the av erage depth of the red sea?
2. Two of the largest Internet retailers are ebay and amazon.com. Recently, the estimated U.S. sales of ebay were $0.1 billion less than twice the sales of Amazon.com. Given the total sales of $5.6 billion, determin the sales of the eBay and Amazon.com.
3. In a recent year, the best selling DVD was the Lord of the Rings: The Fellowship of the Rings. Another big seller was Harry Potter and the Sorcerer's Stone, which sold 90 million less than the Lord of the Rings. If the two movies totaled 424 million, how many DVD's of each were sold?
Click here to see answer by elima(1433) About Me 
Question 72390: I really need elp with his question: h(x) = -x squared plus 6x and g(x) = 70
h(g(x))=
Click here to see answer by pradhyumna.kumar@gmail.com(62) About Me 
Question 72390: I really need elp with his question: h(x) = -x squared plus 6x and g(x) = 70
h(g(x))=
Click here to see answer by stanbon(57387) About Me 
Question 72389: what type of equation do i use to give the slope-intercept of an equation of the line that is perpendicular to 8x+5y=4 and contains (-9,1)?
Click here to see answer by stanbon(57387) About Me 
Question 72402: using the slope formula find the slop using (5,6 and (-3,1)
Click here to see answer by pradhyumna.kumar@gmail.com(62) About Me 
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