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

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Question 352153: please help make a linear equation for the following table. thanks.
Price 1 1.50 2.00 2.50 3.00 3.50
Demand 200 175 140 120 80 60
Click here to see answer by Fombitz(32388)

Question 352228: how do you solve each system of simultaneous equations by using the substitution method?
x=6y-10
8x+60=28y
Click here to see answer by Fombitz(32388)

Question 352233: what is the system of simultaneous equations by using the substitution method?
x=10-y
y=x-8
Click here to see answer by jim_thompson5910(35256)

Question 352234: what is the system of simultaneous equations by using the substitution method?
x=10-y
y=x-8
Click here to see answer by sofiyac(983)

Question 352230: what is the system of simultaneous equations by using the substitution method?
x=10-y
y=x-8
Click here to see answer by sofiyac(983)

Question 352236: what is the equation of the line?
m=2; P=(0,1)
Click here to see answer by jim_thompson5910(35256)

Question 352239: what is the equation of the line m=1; P=(-7,0)
Click here to see answer by Fombitz(32388)

Question 352500: what is 2x+3y=4
Click here to see answer by jim_thompson5910(35256)

Question 352501: Midpoint/Distance/Linear Equations
Mario and Luigi need to get from their home to the race track in their hometown of coordinateville. They know that their home is located at (-4,-5) and the race track is at (-3,-7). Find the midpoint and the distance between their house and the race track. Also, what is the line of equation between their house and the race track?
Click here to see answer by nyc_function(2741)

Question 352559: Sketch a graph of the rational function
y= (x^2+3x+2)/(x^3+4x^2-3x-18)
giving exact or numerical values for all intercepts,asymptotes and turning points.
Click here to see answer by Fombitz(32388)

Question 352558: if it costs $20,000 to make 700 chairs and $30,000 to make 1500, write an equation that relates cost to number of chairs. what is the cost to make 2000 chairs
Click here to see answer by josmiceli(19441)

Question 352587: question 1: The double of a number is 13 more than 73 , find the number ?
Click here to see answer by ewatrrr(24785)

Question 352597: what is the slope and intercept of 8x=9y+18
Click here to see answer by stanbon(75887)

Question 352597: what is the slope and intercept of 8x=9y+18
Click here to see answer by Fombitz(32388)

Question 352640: why does the equation 2x+4=6 only have one intercept?
Click here to see answer by Alan3354(69443)

Question 352384: what is the equation of? P1=(4,-5); P2=(11,2)
Click here to see answer by Fombitz(32388)

Question 351973: A local community center offers self-defense classes for teens. A $25 enrollment fee covers supplies and materials and open classes cost $10 each. Write an equation to represent the total cost of x self-defense classes at the community center.
Click here to see answer by sofiyac(983)

Question 352667: Here is the question.
A childs bank has only quarters and dimes, the total in the bank is $2.20. There are three times as many dimes as there are quarters. How many dimes are there and how many quarters are there?
the solution is written in the book, but I do not understand how the answer came to be.
0.25x + 0.10(3x) = 2.20
0.55x = 2.20
0.55x = 2.20
____ ____
0.55 0.55
x = 4 quarters
3x = 12 dimes
How did they come up with that answer? PLEASE HELP ME.
Click here to see answer by josmiceli(19441)

Question 352676: Given a slope of m = 6 and a point (5, 1), would the corresponding line equation be ?
Click here to see answer by sofiyac(983)

Question 352703: Find a linear equation that is perpendicular to the linear equation 2x-5y=3.
I don't know how to do this without given points.
Click here to see answer by Alan3354(69443)

Question 352703: Find a linear equation that is perpendicular to the linear equation 2x-5y=3.
I don't know how to do this without given points.
Click here to see answer by Fombitz(32388)

Question 352780: 1. By looking at an equation of a line, how can you tell if the line is horizontal?
(I don't understand this question at all!)
Click here to see answer by solver91311(24713)

Question 352758: what are x & y?
using substitution;
y=1/2x+5
2y=x-24
Click here to see answer by sofiyac(983)

Question 352811: turn 4x+3y=6 into slope-intercept form
Click here to see answer by jim_thompson5910(35256)

Question 352833: what is the slope of the equation y-1.5x-4.5?

Click here to see answer by nyc_function(2741)

Question 352852: what is the y-intercept of the equation y=1.5x -4.5
Click here to see answer by nyc_function(2741)

Question 352859: Hello,
I'm having an issue coming up with any way to get the correct answer for this Algebra problem. I need to find the intercepts for the graph of the equation given, which is 2x-3y=18. I have an example problem exatly like that which is 6x-5y=90 and the answer is: x-intercept is (15,0) and the y-intercept is (0,-18). I can usually use the exaple as an aide but I can not come up with the correct answer. Thanks in advance for your help!
Click here to see answer by scott8148(6628)

Question 352955: how do you find the x intercept and y intercept of g(x)=4x-1
Thanks!
Click here to see answer by jim_thompson5910(35256)

Question 352970: how do you find the value of k so that (k^2 , k) is on the line 2x-5y=3
thanks!
Click here to see answer by stanbon(75887)

Question 352993: This is kind of confusing,
How to show that an equation of the line with x-intercept "a" and y-intercept "b" is x/a + y/b = 1
Thanks!
Click here to see answer by Alan3354(69443)

Question 353111: State the slope and graph the line:
1) 4x-7=13
2) 13+2y=5
3) 2x-7y+12=0
Click here to see answer by mananth(16946)

Question 353164: Please help me solve this equation: 3x/4 + 5x/2 = 13
I have tried to solve it three different ways, but I continue to have complications, I don't understand fractions at all.
Click here to see answer by Edwin McCravy(20055)

Question 353175: Please help me solve this problem
I need to find the slope given for x=5
Click here to see answer by Earlsdon(6294)

Question 353212: What does y=25+15x look like when it is graphed? I do not know what to do with the 25.
Click here to see answer by Fombitz(32388)

Question 353230: write this equation in standard form y=-7x+6
Click here to see answer by rfer(16322)

Question 353199: Word problem on percentage: Problem type 3
The price of a technology stock has dropped to 9.74 today. Yesterday's price was 9.85. Find the percentage decrease. Round your answer to the nearest tenth of a percent

Click here to see answer by rfer(16322)

Question 353205: please help
use the method of addition or method of elimination to solve the system of linear equations.
5x+2y=70;15x+6y=20
the answer i got is 0=190
but i'm told the correct answer is 0=-190
will you please explain how you come up with the answer
thank you
Click here to see answer by Fombitz(32388)

Question 353341: how do you do contains point (0,4) and is parallel to y=2x-3? (characteristics of linear functions)
Click here to see answer by nerdybill(7384)

Question 353368: for x-y=4 how would you graph this equation
Click here to see answer by solver91311(24713)

Question 353402: Show me the steps to graphing m=5,b=-4.
Click here to see answer by rfer(16322)

Question 353427: what is slope of a line that passes throught(1,1)(1,2)
Click here to see answer by mananth(16946)

Question 353427: what is slope of a line that passes throught(1,1)(1,2)
Click here to see answer by stanbon(75887)

Question 353432: 7x-5y=-15
Click here to see answer by Alan3354(69443)

Question 353506: Hello. I am a college student dealing with linear equations. I have finsihed the rest of my assignment, but I am stuck on this one problem.
x-y = 3
-6x+6y=17
The instructions to this problem say to Solve each system by the addition method. Determine whether the equations are independent, dependent, or inconsistent.
The example says to multiply each side by the x value.
This is what I have come up with:
x-y = 3 (1)
-6x + 6y = 17 (2)
I multiplied (1) by 6 and (2) by 1
I came up with
6x-6y= 18

-6x+6y = 17
then I end up with both 0 x and 0 y
ox + 0y = 35
That did not give me a workable answer.
Then I tried multiplying (1) by -6 and (2) by 1
-6x+6y = -18
-6x+6y = 17
-12x + 12y = -1
or
-6x-6y = -18
-6x+6y = 17
-12x+oy = -1
-12x = -1
x = -1/-12
x = 1/12 or .083...
That just does not seem right to me. Can you please help me figure out what I am doing wrong!
Click here to see answer by edjones(8007)

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