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

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Question 273142: find the value of C such that each pair of points is 5 units apart
(0,C) (3,1)
Click here to see answer by solver91311(24713)

Question 273184: What is the slope intercept form of the line that passes through the given point with slope m.
Through (3,-3), m=2
Click here to see answer by checkley77(12844)

Question 273200: solve the system of equations by graphing
5x-4y=8
5x=4y+8
i need two ordered pairs each so i can graph
Click here to see answer by brown.robin72@yahoo.com(1)

Question 273235: Write the equation in slope-intercept form of the line that has a slope of -3 and contains the point (4, -5)
________________________
What I have tried
Given - m = -3
(x,y) - x=4 y=-5
y=m(x)+b
-5 = -3(4)+b
im lost from there on.
Click here to see answer by CharlesG2(834)

Question 273276: How do you know when an equation has infinitely many solutions?
How do you know when an equation has no solution?
Click here to see answer by CharlesG2(834)

Question 273255: write the equation of the line containing P(3,0) and perpendicular to the x-axis
Click here to see answer by jim_thompson5910(35256)

Question 273283: If the slope of a line through (-3,-4k) and (5,8) is -2/3, what is the value of k?
Click here to see answer by JBarnum(2146)

Question 273309: Find an equation of the line containing the given pair of points.
(1,4) and (3,5)
I found m first 5-4/3-1 = 1/2
Then through other sources told me to use this formula
y-y^1=m(x-x^1)
y-4=1/2(x-1)
y-4=1/2x(1/2)(-1/1)
y=1/2x-1/2+4
y=1/2x-2
But the answer is y=1/2x+7/2
Where did I go wrong? Please could you show me how do this by step by step?
Thank you
JPA

Click here to see answer by Alan3354(69443)

Question 273322: Solve
5/4x+1/8x=3/8+x
This is how I did on my own
5/4x+1/8x-3/8-x=0
10/8x+1/8x-3/8-8/8=0
10x+x = 11x
11/8x-11/8=0
0=0
The answer is 1
How did they get this?
jpa
Click here to see answer by josmiceli(19441)

Question 273307: Find an equation of the line having the given slope and containing the given point. m= -3,(4,8)
The answer book gives the answer as -3x+20.
I understand how they got the -3x because the question says the m=-3. The formula is y=mx+b. How did they get the +20? Can you show me how?
Thank you
jpa
Click here to see answer by solver91311(24713)

Question 273313: how to you find the equation for A line that passes through (1,1) and is perpendicular to the line 4x+6Y=18.
Click here to see answer by scott8148(6628)

Question 273358: write an equation for the line perpendicular to y= -2/5x-4 and passes through (-3,-1)
Click here to see answer by checkley77(12844)

Question 273356: A yardstick measures 0.5 by 2 by 36 inches. How many yardsticks will fit in a box 3.5 inches wide and 36 inches high, if the length of the box is 18 inches?
Click here to see answer by checkley77(12844)

Question 273420: how do you do slope
Click here to see answer by Tobiasz(54)

Question 273320: A circle with a radius of 4 and a midpoint at (2,2)
Click here to see answer by Edwin McCravy(20055)

Question 273454: how do I graph the equation y-2x=8
Click here to see answer by jim_thompson5910(35256)

Question 273435: Given the piecewise function f(x)={(5x+1for3 ≤ x < 7,
3x-5 for7≤ x <10
determine f(9).
Click here to see answer by solver91311(24713)

Question 273547: a rectangle is twice as long as it is wide its area is 450 sq centimeters,what are the dimentions?
Click here to see answer by mananth(16946)

Question 273591: 3x+2y=6 solve for y, I can't figure it out, I need to see it step by step
Click here to see answer by jim_thompson5910(35256)

Question 273601: How do I properly graph this equation on algebra.com? x-4y=-8
I know that rise=2 run=8 and slope=1/4
My original task was to find the rise, run, and slope and then write in standard form after looking at a graph. that had a line on it.
I understand that Ax+By=C
I don't quite understand what Ax is, Bx, or C. The original problem didn't have the standard form answer of x-4y=-8, that was in the back of my text book.
I have included what I thought was the correct graph, but all it did was draw a horizontal line.
So, if you can show me what I am missing in the computer formula I would appreciate it. I would love for someone to explain how to get the standard form out of the given information
graph( 300, 200, -6, 5, -10, 10, x-4y=-8)

Click here to see answer by Theo(13342)

Question 273828: given the equation 2x+3y=4is the slope of the line discribed by this equation positive or negative how do i find out.
Click here to see answer by josmiceli(19441)

Question 273838: I am trying to help my 7th grade son and I can't when I don't remember how to do it. Here is the problem.
A rectangle has a perimeter of 52inches.
A) Write an equation describing the possible values of x and y
B) Use the intercepts from the equation to graph
C) Give 3 pairs of whole-numbers values of x and y that could represent side lengths of the rectangle.
Please show me all the steps so I can help him.
Thanks
Click here to see answer by josmiceli(19441)

Question 273898: I need help solving this for my 9th grade son
Find the line of best fit between the following points:
(1,5) and (3,8)
a) 1.5
b) 3.5
(his answers)
line: ____?_____
His answer 1.5 and 3.5 came from calculator instructions, he needs the step by step instructions for solving (without a calculator).
Any help is greatly appreciated.
Click here to see answer by scott8148(6628)

Question 273995: Put the equation 2x - 3y = 15 into slope-intercept form. Think you get two answers...right
Click here to see answer by jim_thompson5910(35256)

Question 273991: If a line with equation 3x -ky= 4 has a slope 5/6, find the value of k?
Help?
Click here to see answer by jim_thompson5910(35256)

Question 274012: I have the following information:
3 bags = 18 servings
2 servings per person
how many bags do i need for x amount of people.
Click here to see answer by richwmiller(17219)

Question 274059: Given the graph below, how do I determin the rise, run, & slope? Also, how do I determine the equation so I can write it in standard form?

Click here to see answer by josmiceli(19441)

Question 274144: What is the slope of the line for the equation 3x+3y=12?
Click here to see answer by TheGagePrice(3)

Question 274216: Find the slope, x-intercept, and y-intercept for the line 4x-8y-5=0
Click here to see answer by fractalier(6550)

Question 274198: Find an equation of a linear function o(x)for which o(3)=7 and o(-1)=5.
Then find o(20).*
*By the way...the "o" is supposed to be the symbol in my problem which is an o with a vertical line through it...I'm assuming it's just a variable like x or y.
Thanks so much for your help!
Click here to see answer by solver91311(24713)

Question 274252: write an equation of a line that passes through ( -5, 4) and )3, -2)
Write and equation of the line passing through the point (0, 6) and parallel to the line y= 2x-5
Click here to see answer by solver91311(24713)

Question 274253: contains (12, 10) and slope 5/6
Click here to see answer by checkley77(12844)

Question 274295: Using this equation (-6x +3y=2) determine the intercepts, write the equation in slope-intercept form, and write equations of a parallel and perpendicular line.
Thank you in advance.
Click here to see answer by checkley77(12844)

Question 274421: How do you interpret the slope and y-intercept in a real-world case?
Click here to see answer by stanbon(75887)

Question 274421: How do you interpret the slope and y-intercept in a real-world case?
Click here to see answer by Earlsdon(6294)

Question 274431: find the slope of the line that passes through each pair of points (-10,6) (-5,8)....is the correct answer (-5,-2) and/or 2/5?
Click here to see answer by Kaley2(4)

Question 274432: Question- why the line x = 4 is a vertical line.
Thank you
Click here to see answer by Kaley2(4)

Question 274484: Can you please help me find the midpoint of the line between the two points
(-5,2) and (2,7)? Thank you!
Click here to see answer by scott8148(6628)

Question 274499: Solve for the unknown variable: 9n^2=81
Click here to see answer by chashmish(8)

Question 274562: Which of the following represents a line that is Perpendicular to the following: y= 3x + 6
Click here to see answer by dabanfield(803)

Question 274720: I need to find an equation of the line containing the given pair of points; (-3,-1) and (-9,-6). The equation of the line in the slope-intercept is y=?
m=y2-y1= -6-(-1)= -5
x2-x1 -9-(-3) -6
y-(-1)=m(x-x1)
y-(-1)=-5(x-(-3))
-6
y-(-1)=-5x-5
-6 2
y=-5 -3
6x 2
Apparently I did this wrong somewhere and I am not sure what I did wrong. Can someone help me please.
Click here to see answer by jim_thompson5910(35256)

Question 274739: Find the equation of the line through the points (-3,-1) and (-9,-6)
Click here to see answer by jim_thompson5910(35256)

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