# Questions on Algebra: Coordinate systems, graph plotting, etc answered by real tutors!

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 Question 626512: the midpoint of the line segment from p1 to p2 is (-1,6) if p1 =(-9,3) what is p2 Click here to see answer by jim_thompson5910(29613)

 Question 626518: verify the area of a triangle abc a=-2,11 b=5,7 c=1,0 for some reason when i plug it in i get the wrong answer what is the area? Click here to see answer by ewatrrr(11176)

 Question 626665: Write the equation of the line that is perpendicular to the x-axis and passing through the point (5,1). Click here to see answer by ewatrrr(11176)

 Question 626615: plot a graph 1)3x+2y=4 9x+6y=16 also show working (values of x and y) Click here to see answer by ankor@dixie-net.com(16524)

 Question 627653: a line passes through the point (0,2) and has a slope of -1/4 what is the equation of the line ? Click here to see answer by jim_thompson5910(29613)

 Question 628657: I want to undestand linear equation through real life example Click here to see answer by Alan3354(34677)

 Question 629865: Connect consecutive points with straight lines (-1, 5)(0,4)(1,4)(2,5)(2,6)(3,5) (4,5) Click here to see answer by reviewermath(721)

 Question 632271: Given f(x) = 8x -2 and g(x) = 2x – 3 find f - g Click here to see answer by reviewermath(721)

 Question 632748: How do I solve the system of equations by graphing: 7x-9y=27 7x=9y+27 ? I have a hard time figuring the method of solving by graphing. Click here to see answer by reviewermath(721)

 Question 633429: find equation of a line whose x intercept is-3 and which is perpendicular to the line 3x+5y-8=0 Click here to see answer by ewatrrr(11176)

 Question 633992: A bag contains 3 red balls, 4 black balls and 5 green balls. One ball is picked up from the bag randomly. What is the probability of getting a red or a green ball? Which answer is it? a. 1/3 b. 2/3 c. 4/5 d. 6/7 Click here to see answer by reviewermath(721)

 Question 633989: What are the solutions for the quadratic equation 2x2 – 12x – 32 = 0? Which answer is it? a. {2,8} b. {-2,-8} c. {-2,8} d. {2,-8} Click here to see answer by Maths68(1474)

 Question 633987: If the x-intercepts of a parabola are 1 and –5, what is the equation of the axis of symmetry? Which answer is it? a. x = 4 b. x =-4 c. x = 2 d. x = -2 Click here to see answer by ankor@dixie-net.com(16524)

 Question 634547: Enumerate all the possible quadrants or axes containing a point satisfying the condition xy=0 ? xy=-1? ==== for xy=0, i know that at least one of these would have to be equal to zero. so if x=0, then it could be anywhere on the y-axis. if y=0, it could be anywhere on the x-axis. if x and y=0, then it would be on the origin. So how am I supposed to phrase that, in particular? xy=-1 works the same way. one has to be 1, the other -1. Also: theoretically, if x<0, it could be in either quadrants 2 and 3. should i include "negative x-axis"? Click here to see answer by Edwin McCravy(9717)

 Question 635315: The line y=mx+b intersects with the x-axis at point A and with the y-axis at point B and passes through point P(s,t). 1. The value of b is equal to the _-coordinate of point_. 2. s and t satisfy the equation _= ms+b Click here to see answer by stanbon(60771)

 Question 635478: what is the area of a strip of wall that is 48 inches by 10 yards? Click here to see answer by solver91311(18785)

 Question 636044: I need assistance with writing point-slope form for an equation with the slope and one point already given. one example is "what is the point-slope form of a line through (4,-4) with a slope of -9/4?" I don't even know how to begin solving this problem. I practically need a lesson on how to do this kind of thing in general. Click here to see answer by ewatrrr(11176)

 Question 636050: I need assistance writing slope-intercept form of a line between two given points. An example would be writing slope-intercept form of a line through points (1,-3) and (0,4. Click here to see answer by Alan3354(34677)

 Question 636919: The shell fired from the base of the hill follows the parabolic path y=-(x^2/4)+8x with distances in miles. the hill has a slope of 1/4. how far from the gun is the point of impact? Click here to see answer by stanbon(60771)

 Question 637604: slope= -2 x intercept (1,0) what's the equation in slope intercept form? -thanks Click here to see answer by solver91311(18785)

 Question 637849: For each given axis of symmetry and point on a parabola, determine another point on the parabola axis of symmetry x=2; given point (0,5) axis of symmetry x=5; given point (-7,3) axis of symmetry x=1/2; given point (-2,7) axis of symmetry x=5; given point (10,0) Click here to see answer by reviewermath(721)

 Question 638415: I need this explained to me, tried figuring it out myself and I am pretty sure I did it wrong. I need to write out and graph this problem: 3x = -2 Can someone explain to me please? I'm a little lost. Click here to see answer by reviewermath(721)

 Question 639967: Solve this system graphically. indicate the method you use to plot the lines and show your work y=2x 2x+y=4. Check by substituting the answer back into the orginal equation. Click here to see answer by solver91311(18785)

 Question 640146: determine the value of r so that the line through (5,20) and (7,r) has a slope of m=-1/2 Click here to see answer by reviewermath(721)
 Question 640146: determine the value of r so that the line through (5,20) and (7,r) has a slope of m=-1/2 Click here to see answer by lwsshak3(7679)

 Question 640472: write the equation of line passing through (-2,4) that is parallel to the line y=1/2x-2 Click here to see answer by solver91311(18785)

 Question 640657: Problem: Let f be a function such that f(-2)=5, f(0)=-2, and f(1)=0. Give the coordinates of the three points on the graph of y=f(x+3). I'm not sure how to get started on this problem or where to even go once I get started. Could you write a step-by-step solution with explanations for each step? Thank you. Click here to see answer by reviewermath(721)

 Question 640842: solve the inequality and graph the solution set 2x-5<3x-2x Click here to see answer by jim_thompson5910(29613)

 Question 641747: -5x+6y=100 list (a) the coordinates of any y-intercept and (b) any coordinates of any x-intercept. Click here to see answer by lynnlo(4174)

 Question 644336: How do you find the x and y intercept of points (-6,-2) and (-1,3). This is the only one i can't figure out but I got the slope as 5/7. thanks! Click here to see answer by reviewermath(721)

 Question 645732: Write an equation for the line Slope1/3 andy-intercept3 Click here to see answer by Alan3354(34677)
 Question 645732: Write an equation for the line Slope1/3 andy-intercept3 Click here to see answer by stanbon(60771)

 Question 645757: what is the x and y intercept of the equation 3x=y-1 Click here to see answer by MathLover1(7480)

 Question 645762: Write an equation of the line A line passing through (-2,-7) with slope -3/2 Click here to see answer by jim_thompson5910(29613)

 Question 646411: Graph the lines x=1 and y =-2 on the same coordinate system. Where do these lines intersect Click here to see answer by stanbon(60771)