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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 132019: Once you have the graph of a line, how can you find its slope? Does it matter which points you choose to find the slope? Does the slope vary depending on your choice of points?
Click here to see answer by rapaljer(4671)

Question 132018: Once you have the graph of a line, how can you find its slope? Does it matter which points you choose to find the slope? Does the slope vary depending on your choice of points?
Click here to see answer by solver91311(24713)

Question 132062: Jane invested some amount at the rate of 12% simple interest and some other amount at the rate of 10% simple interest. She received yearly interest of $130. Randy also invested in the same scheme, but he interchanged the amounts invested, and received $4 more as interest. How much amount did each of them invest at different rates?
Please help me solve this problem.
Click here to see answer by josmiceli(19441)

Question 132100: How can i solve this? could you give me step by step advice?
Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.
- 7x + 2 + x � 10 > -3(x � 1)

Click here to see answer by solver91311(24713)

Question 132061: An art dealer sold two artworks for $1520 thereby making a profit of 25% on the first work and 10% profit on the other, whereas if he had approached any exhibition he would have sold them together for $1535 with a profit of 10% on the first and 25% on the other artwork. Find the actual cost of each artwork.
Please help solve this problem.
Click here to see answer by Photonjohn(42)

Question 132105: . Find the slope of the line that passes through the points (2, 3) and (5, 8).

Click here to see answer by stanbon(75887)

Question 132105: . Find the slope of the line that passes through the points (2, 3) and (5, 8).

Click here to see answer by harecurtis(6)

Question 132099: I am so clueless when it comes to Algebra. How could i solve this?
y = -2x � 9

x y
-2
-1
0
1
2

Click here to see answer by stanbon(75887)

Question 132161: A line is located at (-5,0) and (-1,3).Where is the slope?
My answer;3/4
Thanks for all your help!
Click here to see answer by jim_thompson5910(35256)

Question 132207: Solve the system of equations by graphing using these 2 equations y=10x+25 and y=15x+10
Click here to see answer by checkley71(8403)

Question 132228: What is the equation of the line passing through (-3, 7) and perpendicular to -7x-8y=77?
Click here to see answer by solver91311(24713)

Question 132240: y=1/2x-3.What is the slope?
I got an answer of -3
Is this correct?
Thank You!
Click here to see answer by stanbon(75887)

Question 132239: Is y=a^2+8a+16 a parabola?
Click here to see answer by stanbon(75887)

Question 132244: x + 2y - 7z = -1
3x + 7y - 24z = 6
x + 4y - 12z = 26

Click here to see answer by stanbon(75887)

Question 132325: Determine two solutions of the equations and use the points to determine the slope of the line.
Problem 39: x+2y=0
Click here to see answer by jim_thompson5910(35256)

Question 132234: what is equation of the line through the point(7,-5) and the perpendicular to -3x-2y=-31?
which is an equation for the line with x- intercept-3 and y-intercept - 2 ?
Click here to see answer by checkley71(8403)

Question 132368: what is the slope of the graph of 4x+5y=10
Click here to see answer by stanbon(75887)

Question 132215: This is a story problem. There are two poles, 10m and 15m high, and 25m apart on level ground. A wire goes from the top of each pole to the bottom of the other pole. How do you find a function that expresses the height of the intersection of the wires in terms of the heights of the two poles? I know how to find the height of the intersection by plotting coordinates and finding the intersection of the 2 lines based on their slopes. The height of the intersecting point is 6m. Can you help me find the function to solve it?
Click here to see answer by stanbon(75887)

Question 132401: Solve and check the linear equation.
-6x-1-3(x+1)=7x-5
Click here to see answer by jim_thompson5910(35256)

Question 132416: please, I am stuck on this question. I need your help:
The linear depreciation method assumes that an item depreciates the same amount each year. Suppose a new piece of machinery costs $36,500 and it depreciates $2,000 every year. Find the value of the machinery after 4 years.

Click here to see answer by solver91311(24713)

Question 132434: Hey Guys,
Hope you had a good weekend, I getting ready for my mid-term and need some help.
How do I solve this equation? The equation is found in: ISBN 053691320x, Title Algebra Math 009, Chapter 2 section 2.4 , Problem 20
0.04x+0.06(30)= 0.20(49)
Click here to see answer by nycsharkman(136)

Question 132448: how would be the best way to solve this problem:the slope is 2;the y intercept is -5?
Click here to see answer by jim_thompson5910(35256)

Question 132396: 2x=-5y+11
Click here to see answer by checkley71(8403)

Question 132460: Okay, what about this one:
2(x-5) = 2x+10
This is what I came up with: but is it right and if not what did I do wrong?
2x + 10 = 2x - 20
2x + 10 + 2x = 2x - 20
10= -20

Click here to see answer by jim_thompson5910(35256)

Question 132489: Okay, thanks you've made my day,can we do another one? Here we go
Okay, this is what I came up with, help me out
7n + 5 = 10n - 10
7x + 17x - 5 = 10x - 10
10x + 10 = =10x + 10
17x = 17x = 10 + 10
17x - 17x = 10 + 10
ox = 20
0 = 20

Click here to see answer by checkley71(8403)

Question 132502: How do you make an equation that is parellel to a given equation?
Click here to see answer by checkley71(8403)

Question 132502: How do you make an equation that is parellel to a given equation?
Click here to see answer by stanbon(75887)

Question 132543: Good morning,
I have an eqaution to solve, help me please.
3(4x+2)=2(1x+5)+8=
Click here to see answer by josmiceli(19441)

Question 132545: Sorry, I thnk I confussed thing when I plac an = at the end.
The equation is: 3(4x+2)= 2(1x+5)+8,
SOORY! But I'm going to study that one as well, I see it is an equation also that I just might have, thank you. But, don't stop.
Click here to see answer by elima(1433)

Question 132579: find the equation of the line passing through the points
a. (1,3) et (3,6)
b. (-2, -5) et (4,2)
c. (2,6) et (4,2)
d. (0,0) et (4,6)
e. (-5,-1) et (7,-5)
f. (1,1) et (7,7)
g. (-2,0) et (3,6)
h. (3,-1) et (-2,1)
i. (-3,0) et (0,-3)
j. (4,4) et (-3,8)
Click here to see answer by solver91311(24713)

Question 132601: Solve for x. Collect xs on the left side. The solution shold be presented with x firstm the correct ienequality symbol, and the the number.
-7x+2+x-10=-3(x-1)

Click here to see answer by jim_thompson5910(35256)

Question 132609: find the midpoint between these two points
(1,-6) and (-5, -2)
Click here to see answer by jim_thompson5910(35256)

Question 132610: fill in the chart given this linear equation
Y=-2x-9
x=-2
x=-1
x=0
x=1
x=2
Click here to see answer by solver91311(24713)

Question 132588: Find an equation of the line passing through the given points. Use function notation to write the equation.
(3,5) and (9,8) f(x)=
Click here to see answer by checkley71(8403)

Question 132675: I have an slope intercept form equation of: y=0.014x-20.60, how would i write this in standard form: Ax+By=C?
Click here to see answer by stanbon(75887)

Question 132695:
I have an equation that is in slope intercept form: y=0.21x-34.75, I want to put this equation into standard form: Ax+By=C how would i do that?
Click here to see answer by checkley71(8403)

Question 132674: I have an equation in slope intercept form: y=0.021x-34.75, how would i write this in the standard form:Ax+By=C?
Click here to see answer by checkley71(8403)

Question 132758: express the following equation in the form Y= mx+b
a. 2y= 6x+8
Click here to see answer by checkley71(8403)

Question 132390: Please, help me to solve this question, it's very urgent:

A new car costs $19,000. 12 years later it is scrap and is worth $1,000. State the equation that represents the cars value (y) after x years.

thanks.
Click here to see answer by scott8148(6628)

Question 132915: Determine teh equation. Write the answer in standard for using only integers as the coefficients.
the line through (-2,0) with slope -3/4
Click here to see answer by stanbon(75887)

Question 132913: determine the slope of the line that goes through each pair
(0,4) and (5,0)
Click here to see answer by stanbon(75887)

Question 132951: Jessica decides to mix grades of gasoline in her truck. She puts in 5 gallons of regular and 7 gallons of premium for a total cost of $29.44. If premium costs $0.16 more than regular, what is the price of each grade of gasoline?
Click here to see answer by ptaylor(2198)

Question 132977: Determine whether the line that passes through the two given points is parallel or perpendicular or neither to a line with a slope of -2
(3,4), (4,2)
Click here to see answer by jim_thompson5910(35256)

Question 132979: find the slope of the line determined by each equation.
3x=4y-2
Click here to see answer by jim_thompson5910(35256)

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