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

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 Algebra: Coordinate systems, graph plotting, etc Solvers Lessons Answers archive Quiz In Depth

 Question 610624: How many liters of 15% acid and 33% acid should be mixed to make 40 liters of 21% acid solution ? Click here to see answer by josmiceli(9680)

 Question 610852: What is the parent graph of y = 2x^2 + 3? Click here to see answer by jim_thompson5910(28595)

 Question 612632: Find the distance between the points (2, -3) and (5, -4). Find the distance between the points (-1, 3) and (5, 0). (Hint: Remember to simplify the square root if you can. For example: sqrt 28 = 2 sqrt 7.) Write your answer to problems 3 and 4 as ordered pairs (x, y). Find the midpoint between the points (3, 1) and (1, 5). Find the midpoint between the points (5, 2) and (-1, -2). Click here to see answer by stanbon(57348)

 Question 613737: i need to find the equation of the line that passes through each pai of points and write the answer in standard form (-2,-4), (1,-1) Click here to see answer by Alan3354(30993)

 Question 615303: Given two points on the line, input the equation of the line in standard form Ax+By=C. Reduce all fractional answers to lowest terms. (6,1) (5,4) Click here to see answer by stanbon(57348)

 Question 614868: Explain how to graph an equation in two variables using point by point plotting. Click here to see answer by asuar010(324)

 Question 615861: How do you find the degree and end behavior of: f(x)= -5x^3+7x^2+10x-12 Click here to see answer by stanbon(57348)

 Question 615956: can you please solve this for me? 5x – 7y = -16, 2x + 8y = 26 Click here to see answer by scott8148(6628)

 Question 616410: What are some equations of the line the passes through the points (-8,4) and (6,-2)? Please get back as soon as possible. Click here to see answer by josmiceli(9680)

 Question 616450: In the plane xy-plane, which of the following are point os intersection of the circles whose equations are x^2 + y^2 = 4 and (x - 2)^2 + y^2 = 4? A. (-1, sqrt(3)) , (-1, -sqrt (3)) B. (1, sqrt (3)), (1, -sqrt (3)) C. (1, sqrt (3)), (-1, sqrt(3)) D. (1,1), (-1,1) E. (1,1), (1, -2) How is it possible that a circle can be expressed by an equation? I am quite perplexed by this... How do you find the point of intersection? Thank you so much for any help you can give me? Click here to see answer by ewatrrr(10682)

 Question 616669: Without graphing answer the following questions about the system. 4x+y=8 12x-24=-3y Does the system have one solution, no solution, or an infinite number of solutions? Is the system inconsistant, are the equations dependent, or neither? What does the graph look like, One line, intersecting lines, or parallel lines? Click here to see answer by stanbon(57348)

 Question 617761: Without graphing answer the following questions about the system: 4x+y=7 32x-56=-8y Does the system have one solution, no solution or an infinite number of solutions? Is the system incosistent, are the equations dependent, or neither? What does the eqation look like? Does it have one line, parallel lines or intersecting lines? Click here to see answer by Theo(3464)

 Question 618686: How to write -7y=8x-3 in slope-intercept form ? Click here to see answer by ewatrrr(10682)

 Question 619479: please i need help with , which of the points (-6,3) and (3,0) is closer to (-2,1) thanks so much Click here to see answer by josmiceli(9680)

 Question 620552: determine the slope and the y-intercept. then graph the equation. y=2/3x+5 Click here to see answer by stanbon(57348)

 Question 620637: How do i graph the linear equation Y=-2x + 5/2 Click here to see answer by josmiceli(9680)
 Question 620637: How do i graph the linear equation Y=-2x + 5/2 Click here to see answer by solver91311(16885)

 Question 620689: true or false, the graph of 2x-3y=6 is a line, for all real numbers x and y Click here to see answer by jim_thompson5910(28595)

 Question 620800: when you have lxl the l's would be bars. what does that mean?? Click here to see answer by lynnlo(4164)

 Question 621129: Give the coordinates of the vertex and graph the coordinates of the parabola? y=x^2+2x+4 I know the vertex is (-1,3) and I can easily plot that on the graph but what is the other point I have to plot in order to graph the parabola? I'm having a hard time with the graphing part. Click here to see answer by solver91311(16885)

 Question 621126: Give the coordinates of the vertex and graph the coordinates of the parabola? y=x^2+2x+4 I know the vertex is (-1,3) and I can easily plot that on the graph but what is the other point I have to plot in order to graph the parabola? I'm having a hard time with the graphing part. Click here to see answer by ewatrrr(10682)

 Question 621436: I need help solving this problem x-2y=-8 (ordered pairs and how to graph it) Click here to see answer by ewatrrr(10682)

 Question 621516: -6x^3+2x^2+8x+5 What is the degree of the first term? What is the degree of the second term? What is the degree of the third term? What is the degree of the forth term? The degree of the polynominal is __? Click here to see answer by Alan3354(30993)

 Question 622034: Solve the system of equations by graphing? 5x-6y=36 5x=6y+36 I was able to solve the first equation 5x-6y=36 and graph it but I wasn't able to solve the second equation 5x=6y+36 and graph it. Can you please include the points that I have to graph, thanks. Click here to see answer by ewatrrr(10682)

 Question 622084: Sketch the graph of the parabola. y=-x^2+4x-7 I found the vertex which is (2,-3) so I graphed that point. What is the other point that I need to graph? I don't know how to get the other point in order to complete the graph of the parabola. Can you please include the other point and how you got the other point, thanks. Click here to see answer by jim_thompson5910(28595)

 Question 622103: Graph the quadratic equation by plotting points? Graph the quadratic equation by plotting points y=-2x^2+3 I found the vertex which is (0,3) so I graphed that point. What is the other point that I need to graph? I don't know how to get the other point in order to complete the graph of the parabola. Can you please include the other point and how you got the other point, thanks. Click here to see answer by jim_thompson5910(28595)
 Question 622103: Graph the quadratic equation by plotting points? Graph the quadratic equation by plotting points y=-2x^2+3 I found the vertex which is (0,3) so I graphed that point. What is the other point that I need to graph? I don't know how to get the other point in order to complete the graph of the parabola. Can you please include the other point and how you got the other point, thanks. Click here to see answer by ewatrrr(10682)

 Question 622208: Answer true or false and explain: 1. A positive rate of inflation means prices are rising. 2. Knowing a line’s slope is enough to write an equation of a line. 3. Parallel lines that are not vertical have the same slope. Click here to see answer by solver91311(16885)

 Question 622577: How do I incorporate these words in this problem? Words Origin, Ordered pair, X- or Y-intercept, slope, Reciprocal. This is the equation: Y= -3X -6; (-1,5) and Y = (-1/3)X -4; (-6,-3) I know nothing about this problem I have to turn it in on June 21, 2012 and 11:59 pm. Please help Click here to see answer by lynnlo(4164)

 Question 622592: Find the x and y intercepts and graph the equation plotting the intercepts. Please show all of your work. -4x+9y=-36 Click here to see answer by lwsshak3(6505)

 Question 623365: The base of an equilateral triangle with side 2a lies along the y-axis such that mid-point of the base is the at the origin.find the vertices of the triangle.pls...guide me with the steps.pls do help me. Click here to see answer by ewatrrr(10682)

 Question 623496: Write the equation of the line that is perpendicular to the line y = 2x + 2 and passes through the point (6, 3). Click here to see answer by math-vortex(472)

 Question 623677: Dear All, I wish if you could help me understand below, please? The problem says: Line X has a slope of 3. The line passes through Point X at (-2,-1) and also passes through Point Z., which has an x-coordinate of 0. What are the coordinates of Point Z? So I guess that I have to substitute the given values in the formula m=Y2-y1 / X2-X1 (sorry I could not find the small 2s and 1s in my keyboard). So I got: 3= -1-y/-2-0 then 3= -1-y / -2 and after that I am stuck. I do not know how to find the Y value. Many thanks for your help. Ilda Click here to see answer by Alan3354(30993)
 Question 623677: Dear All, I wish if you could help me understand below, please? The problem says: Line X has a slope of 3. The line passes through Point X at (-2,-1) and also passes through Point Z., which has an x-coordinate of 0. What are the coordinates of Point Z? So I guess that I have to substitute the given values in the formula m=Y2-y1 / X2-X1 (sorry I could not find the small 2s and 1s in my keyboard). So I got: 3= -1-y/-2-0 then 3= -1-y / -2 and after that I am stuck. I do not know how to find the Y value. Many thanks for your help. Ilda Click here to see answer by MathTherapy(1424)

 Question 624350: For the graph of the equation , (x^2)(y^2)+ (xy)= 8 Is the graph symmetric with respect to the X-axis? Yes or No? Is the graph symmetric with respect to the Y-axis? Yes or No? Is the graph symmetric with respect to the Origin? Yes or No? Click here to see answer by KMST(1868)

 Question 625037: find the equation of the line passing through point (4,-1) and parallel to the line joining A(-2,5) and B(4,9) Click here to see answer by oscargut(891)

 Question 625686: please help me with this question it says i have to solve the system below graphically and indicate the method i use to plot the lines and show my work.... a. y=2x 2x+y=4 b. check by substituting the answer back into the orginal equations. thank you... Click here to see answer by solver91311(16885)

 Question 625821: Given that A is the point (0,11),B is the point (8,5) and O is the origin calculate the coordinates of M the midpoint of AB Click here to see answer by oscargut(891)

 Question 625895: find the rectangular coordinates of the point with polar coordinates (-2, 5pi/6) Click here to see answer by Alan3354(30993)