# 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 259827: Given U = {15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25}, A = {16, 18, 20, 22}, and B = {17, 19, 20, 23, 24}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their intersection. Click here to see answer by drk(1908)

 Question 259820: Without writing them all out, what is the number of subsets of set B = {3, 6, 9, 12, 15, 18}? Click here to see answer by drk(1908)

 Question 259822: Given these sets: A = {1, 2, 3, 4} B = {3, 4, 5, 6, 7} C = {3, 5, 7, 9} List the elements of this set B ∩ (AC) Do not skip to the answer. Show your work, step by step Click here to see answer by jim_thompson5910(28504)

 Question 260147: Graph this equation and identify the y interceptor. x + 5y = 20 Click here to see answer by stanbon(57246)
 Question 260147: Graph this equation and identify the y interceptor. x + 5y = 20 Click here to see answer by richwmiller(9135)

 Question 260445: a ball is thrown downward from a window in a tall building. the distance, d, fallen after t seconds is d=16t2(squared) + 32t where d is in feet. how long (to the nearest tenth) will it take the ball to fall 110 feet? Click here to see answer by Alan3354(30983)

 Question 260537: Find an equation for the line with the given properties. Parallel to the line y = 8; containing the point (9, 1) Click here to see answer by stanbon(57246)

 Question 260545: Find the slope of the line and sketch its graph. 3x - 5y = -11 Click here to see answer by onlinetutor365.com(14)

 Question 260876: Write the equation of the line that has a undefined slope and contains the point (-4, 7). Click here to see answer by Fombitz(13828)

 Question 261764: find the slope of the line, if possible. (if the slope is undefined, enter undefined) the graph of y=16 Click here to see answer by richwmiller(9135)

 Question 261769: find the slope of the line, if possible (if the line is undefined, enter undefined) the graph of x=13 Click here to see answer by richwmiller(9135)
 Question 261769: find the slope of the line, if possible (if the line is undefined, enter undefined) the graph of x=13 Click here to see answer by jim_thompson5910(28504)

 Question 261772: find an equation of the line passing through (-4,7) and parallel to the graph of 2x+y=5. write the equation in slope intercept from. Click here to see answer by stanbon(57246)
 Question 261772: find an equation of the line passing through (-4,7) and parallel to the graph of 2x+y=5. write the equation in slope intercept from. Click here to see answer by josmiceli(9661)

 Question 262337: The points(-1,-7) and (5,10) are the endpoints of the diameter of a circle. Graph the circle. Find an equation of the circle. Click here to see answer by solver91311(16868)
 Question 262337: The points(-1,-7) and (5,10) are the endpoints of the diameter of a circle. Graph the circle. Find an equation of the circle. Click here to see answer by Theo(3458)

 Question 262671: Ordered pairs (0,2), (4,0), and (-4,0) are points on a circle. What is the radius of the circle, and what is the center point of the circle. I don't want to be given the answer directly, I just want to know what formulas I should be using to solve this problem. I have tried using the distance formula to get the distance between (0,2) and either of the x intercepts. I tried finding the Y intercepts by replacing both X points in the circle equation, where (k,h) is the midpoint of the circle and r is the radius. I just need to figure out what the other y intercept is and I can answer the question, but I don't know how to figure it out. Please help. Click here to see answer by richwmiller(9135)

 Question 263992: Graphing the system: x + 4 = 11 x -4 = 5 Click here to see answer by JBarnum(2044)

 Question 264020: Is the line x=2 perpendicular to the line x=-7? Click here to see answer by jim_thompson5910(28504)
 Question 264020: Is the line x=2 perpendicular to the line x=-7? Click here to see answer by stanbon(57246)

 Question 264035: Ok, my question reads, "Graph both of the following functions on the same coordinate system. State the point of intersection as an ordered pair." The functions it gives me are and . But how can I solve them if I don't know what y or x are? Am I supposed to make my own number for either y or x to solve it, or am I missing something? I know how to graph, and I can find the point of intersection, but I can't figure out how to solve the functions without a function table. Please help if you can? Thank you. Click here to see answer by jim_thompson5910(28504)

 Question 264409: Find the slope of the line that passes through the given points (-2, 10), (6, 2) Click here to see answer by Alan3354(30983)

 Question 265662: y = 5 and x = -2 on a graph, Where do these lines intersect Click here to see answer by Alan3354(30983)

 Question 266165: when given 2 coordinates ie., (-3,-3) and (2,6) how do you know which one is y1,y2,x1,x2? which one would be put into the equation first as far as the top and bottom? Click here to see answer by checkley77(12569)

 Question 266106: a. What is the slope of the line of best fit? Use the points (1991, 230) and (1997,350). Show your work. b. What is an equation for the line of best fit? Use the point (1991,230). Show your work. c. According to your equation, what were the sales in 2000? Show your work. (5 points) (Points :5) Click here to see answer by ankor@dixie-net.com(15638)

 Question 268182: what is the slope of the line 12x+2y=-48 Click here to see answer by azhou4(12)

 Question 268904: Write a slope-intercept equation for a line with the given circumstances. Passes through (-3,7) and (-1,-5) Click here to see answer by jim_thompson5910(28504)

 Question 269719: what is the standard form of m=-1/5 b=-5 Click here to see answer by Alan3354(30983)

 Question 269961: what is the x-intercept of the graph 8x+4y=16 Click here to see answer by rfer(12647)

 Question 270445: x^2+2x-6=0 Solutions; 1.65 and -3.65 i need the steps between the problem and the solution to help my daughter with her homework please. jhp Click here to see answer by papugai(18)

 Question 271092: find all points with an x-coordinate of 6 that are 5 units from (3,3). Click here to see answer by Greenfinch(383)

 Question 271064: what is the distance from (-4,5) to the line defined by y=-2x+7 Click here to see answer by dabanfield(803)

 Question 271280: In a coordinate system, points A(-2, 3) and B(6, -1) have a midpoint of X. What is the midpoint between A and X? Click here to see answer by jsmallt9(3296)