Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

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 Algebra: Linear Algebra (NOT Linear Equations) Solvers Lessons Answers archive Quiz In Depth

 Question 50521: I need your help on this. Please help me understand this better. 1 Instructions: Graph each pair of equations in the same coordinate plane. Find the coordinates of the point where the graphs intersect. Then show by substitution that the coordinates satisfy both equations. 3x+2y=0 x-2y=8 Click here to see answer by tutorcecilia(2152)

 Question 50781: The work principal states that if one person can do a job in time 'a' and another can do the same job in time 'b' that they can do the job together in time 't'. This is demonstrated by the equation: 1 over a plus 1 over b = 1 over t Write the expression in terms of a: And then use t=5 hours and b=8 hours, approximately what is a? Click here to see answer by checkley71(8403)

 Question 50779: The cost of a mean including the tip is \$63.76. If Jon tips 18% what was the cost of the mean alone? Click here to see answer by checkley71(8403)

 Question 50778: The width of a romm is 3 feet shorter than its length. The perimeter of the room in 62ft. What is the length and width? Click here to see answer by checkley71(8403)

 Question 51025: 2L + 2W=P Sovle for L I have searched and search for what I know should be a simple answer, but can't find it Click here to see answer by junior403(76)

 Question 51031: -7 over 4 is less than or equal to 3t over 2 minus 1 which is less than or equal to 7 over 4 Click here to see answer by stanbon(57361)

 Question 51027: K=2m-3 over L Solve for L the 2m-3 is over L Click here to see answer by checkley71(8403)

 Question 51082: The sum of the ages of Jerry and his father is 64 years. The difference i their ages is 32 years. How old is each? Click here to see answer by darq(90)

 Question 51158: i have the problem 3/11b+5=5. From there have subtracted 5 from both sides and came up with B=3/11 From there i do not know what to do Click here to see answer by stanbon(57361)

 Question 51240: Find the two solutions to this equation. ax^2+8ax=0 Click here to see answer by rapaljer(4667)

 Question 52229: Question: I have an equation and forgot how to solve for x: 50 + 5X = 120 + 3x can you please explain? I am feeling like a big dummy. I know this is very basic. Thanks. Click here to see answer by funmath(2925)
 Question 52229: Question: I have an equation and forgot how to solve for x: 50 + 5X = 120 + 3x can you please explain? I am feeling like a big dummy. I know this is very basic. Thanks. Click here to see answer by tejanosinger(1)

 Question 52306: Write an equation of the line that passes through (2,-7) and is parallel to the line x=5. Click here to see answer by checkley71(8403)

 Question 52241: How can you find an equation of a line satisfying the given conditions: Perpendicular to x=2 and passing through (3,4)? Click here to see answer by rapaljer(4667)

 Question 52472: Please help me on what is the difference between the below formulas: y1 - y2/x1 - x2 and y2 - y1/ x2 - x1 Ex. (4,9), (3,6) m = 5/2 Click here to see answer by Earlsdon(6287)

 Question 52767: An open-top box is to be constructed from a 6 by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out. a) Find the function V that represents the volume of the box in terms of x. Click here to see answer by ankor@dixie-net.com(15656)

 Question 52929: Graph the line that satisfies each set of conditions. passes through (2, -5), parallel to graph of x=4 Click here to see answer by venugopalramana(3286)
 Question 52929: Graph the line that satisfies each set of conditions. passes through (2, -5), parallel to graph of x=4 Click here to see answer by rchill(405)

 Question 53339: The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 100 cubic centimeters. a) Write h as a function of r. Keep "" in the function's equation. Answer b) What is the measurement of the height if the radius of the cylinder is 2 centimeters? Round your answer to the nearest whole number. Answer Show work in this space c) Graph this function. Show graph here Click here to see answer by Earlsdon(6287)

 Question 53145: A traveling salesman (selling shoes) stops at a farm in the Midwest.Before he could knock on the door,he noticed an old truck on fire. He rushed over and pulled a young lady out of the flaming truck. Farmer Brown came out and gatefully thanked the traveling salesman for saving his daughter's life. Mr. Brown insisted on giving the man an award for his heroism. So, the saleman said, "If you insist, I do not want much. Get your checkerboard and place one penny on the first square. Then place two pennies on the next square. Then place four pennies on the third square. continue this until all 64 square are covered with pennies." As he'd been saying pennies for over 25 years, Mr. Brown did not consider this much of an award, but soon realized he made a miscalculation on the amount of money involved. (a) How much money expresses in dollars would Mr. Brown have to put on the 32nd square? (b) How much money expressed in dollars would the traveling salesman recieve in total if the checkerboard only had 32 squares? (c) Calculate the amount of money necessary to fill the whole checkerboard (64 squares).How money expressed in dollars would the farmer need to give the salesman? Click here to see answer by venugopalramana(3286)

 Question 53635: {-3,-3}and {5,6} i need the slope through which the lines both cross Click here to see answer by rchill(405)

 Question 53664: A line parallel to 3x-9y=4 and sketch the graph Click here to see answer by funmath(2925)

 Question 53746: Find the distnace between (-5,6) and (-9,6)? (P.S. i got a negative answer, but im not sure if that is correct, -4) Click here to see answer by stanbon(57361)