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 99537: Find the mean and the median. 2, 7/4 ,3/4 , 4, 9 Click here to see answer by stanbon(57424)

 Question 99495: Quesiton - Find an equation of the line satisfying the given conditions. Through (6,8) and perpendicular to y = 2x - 3 Click here to see answer by jim_thompson5910(28598)

 Question 99618: The following question is actually related to Chemical Equilibrium, but in order to solve that I just need help with this little piece of algebra. So, if you don't mind... 24= (x)/(.850-x) I see in my book that the solution is x=0.861. I just need to know how they get it. The book skips that step! Thank You. Click here to see answer by stanbon(57424)

 Question 99646: baseball season, team A won the most games of any major league team. Team A won 39 less than twice as many games as they lost. They played 162 regular- season games. How many wins and losses did team A have? Click here to see answer by checkley71(8403)

 Question 99665: Solve. 10x  1/4 = 9x + 3/8 Click here to see answer by anjali_yamini(27)

 Question 99670: Heat of a Campfire: The heat experienced by a hiker at a campfire is proportional to the amount of wood on the fire, and inversely proportional to the cube of his distance from the fire. If he is 20 ft. from the fire, and someone doubles the amount of wood burning, how far from the fire would he have to be so that he feels the same heat as before? Heat = H Amount of Wood = W Distance = D Constant (k) w(wood) divided by distance (cubed) Expression: heat = kw/d3 Expression set to a known equation from giving information: kw/d3 Cross multiply w * d3 = w d3 = 2w * 8000 Simplifies to: d3 = 16000 Solve for distance = d = 20 + √2 This answer doesnt seem to satisfy the question, before? It reinforces the fact that the hiker is 20 ft away only? Click here to see answer by stanbon(57424)

 Question 99664: Solve. 27x  2(8x  0.905) = 10x + 0.225 Click here to see answer by stanbon(57424)

 Question 99997: Please help me in this problem. I need to find the value of x and y by using substitution or elimination. Thank you {y=x {x-4y=0 Click here to see answer by stanbon(57424)

 Question 100307: The area of any triangle is A = (½) * (base) * (height), where height is the perpendicular height from the apex (point on top) to the base line. If the height of a certain triangle is 7 feet longer than its base, what is the polynomial that represents its area? (Let X = the base.) Click here to see answer by checkley71(8403)

 Question 100625: You and several of your friends are helping your aunt move. At lunch you volunteer to go out and buy sandwiches. You get 6 chicken sandwiches and 6 beef sandwiches for \$30. Later in the afternoon, everyone is hungry again. You go to the same store and buy 4 chicken sandwiches and 8 beef sandwiches for \$30.60. What was the price of the chicken sandwich? Click here to see answer by checkley71(8403)

 Question 100817: can you write an equation in slope-intercept form for the lie that contains the given point and is perpendicular to the given line. (6,2);y=-3x-1 Click here to see answer by jim_thompson5910(28598)

 Question 101040: A rental car agency charges \$29 per day plus 8 cents per mile to rent a certain car. ANother agency charges &18 per day plus 15 cents per mile to rent the same car. If the car is rented for one day in how many miles will the charge from both agencies be equal? Round your answer to two decimal places. I can't figure out how to form the equations. Click here to see answer by bucky(2189)
 Question 101040: A rental car agency charges \$29 per day plus 8 cents per mile to rent a certain car. ANother agency charges &18 per day plus 15 cents per mile to rent the same car. If the car is rented for one day in how many miles will the charge from both agencies be equal? Round your answer to two decimal places. I can't figure out how to form the equations. Click here to see answer by stanbon(57424)

 Question 101085: solve for the variable indicated 6x-10y=3 solve for y Click here to see answer by tutorcecilia(2152)

 Question 101084: Solve for the variable indicated W=4r-3R solve for "R" Click here to see answer by stanbon(57424)

 Question 101689: I am lost about where to put the data on these functions Please help. The question is; The owners of a landscaping company have determined that their weekly revenue and cost in dollars are given by: R(x)= 95x and C(x)= 45x + 2,000 where x is the number od lawns serviced. a. What will revenue and cost be if they service 30 lawns? b. How many lawns must they service in order to reach their break-even point? Thank you for your time Click here to see answer by stanbon(57424)

 Question 101717: I cant seem to figure out what to do with the data given. Bob owns a watch repair shop. He is open 5 days per week. Over the years, he has determined that the weekly cost in dollars (in dollars) of operating his shop is given by the cost function: C(x)= 2x^2-57x+26 where x is the number of watches repaired. What is the daily cost of running the shop if the number of watches repaired is 50? Thank you for your help Click here to see answer by stanbon(57424)

 Question 101691: can you help: you are starting a business selling boxes of hand-painted greeting cards. to get started, you spend \$36 on paint and paintbrushes that you need. Yoou buy boxes of plain cards for \$3.50 per box, paint the cards, and then sell them for \$5 per box. how many boxes must you sell for your revenue to equal your expenses? What will your revenue and expenses equal when you break even? HELP ME PLUEEZE Click here to see answer by ankor@dixie-net.com(15667)

 Question 101682: I am lost about where to put the data. Please help. The question is; Let the supply and demand functions for sweaters in dollars be: supply: p=9q+6 demand: p=76-5q a. Find the equilibrium demand. b. Find the equilibrium price. Thank you for your time Click here to see answer by ankor@dixie-net.com(15667)

 Question 101865: if 2 is subtracted from a number and this difference is tripled, the result is 6 more than the number.Find the number. Click here to see answer by stanbon(57424)
 Question 101865: if 2 is subtracted from a number and this difference is tripled, the result is 6 more than the number.Find the number. Click here to see answer by edjones(7569)

 Question 101868: In one day, a store sold 8/5 as many DVDs as CDs. The total number of DVD's and CDs sold that day wa 273. How many DVDs were sold. Click here to see answer by Kalmetam(43)

 Question 101815: Still having a little trouble with functions. Question is: Let the supply and demand function for sweaters in dollars be; supply: p=9q+6 demand: p=76-5q a. Find the equalibrium demand b. Find the equalibrium price Thank you for all your help Click here to see answer by stanbon(57424)

 Question 101978: after hours of trying to help my kid i cannot figure this out and nothing i can or have tried works (x/x*x)+(x*x*x/x)+(x*x)=100 using only 1 - 9 Click here to see answer by stanbon(57424)
 Question 101978: after hours of trying to help my kid i cannot figure this out and nothing i can or have tried works (x/x*x)+(x*x*x/x)+(x*x)=100 using only 1 - 9 Click here to see answer by edjones(7569)

 Question 101695: I am lost on how find the functions with the information given. Please help. The information given is; A small family bakery specializes in baking cheesecakes. The fixed cost of production is \$245, the marginal cost per cheesecake is \$5, and each cheesecake sells for \$12. Assume that the cost function is linear. a. What is the cost function? b. What is the revenue function? c. What is the break-even point? Thank you for your time Click here to see answer by ankor@dixie-net.com(15667)

 Question 102267: Multiplication of matrices are only commutative for some cases of matrices. What are these cases? Click here to see answer by jim_thompson5910(28598)

 Question 100306: A rectangle has an area of X^3  6X^2 + 15X  28 square feet. Its width is X  4 feet. What is its length? Click here to see answer by edjones(7569)

 Question 102778: Find an equatioin in standard form of the line having slope m and y-intercept b m = 1/2, b = 3/2 Click here to see answer by stanbon(57424)

 Question 102835: find an equation in standard form of the line containing the given points. (3,-2), (-2,3) Click here to see answer by checkley75(3666)

 Question 103055: find an equation in standard form of the line having slope m and y-intercept b m = -1, b = 2 Click here to see answer by doukungfoo(195)

 Question 103046: find an equation in standard form of the line containg point P and having slope m P(-3,-2),m=1/2 Click here to see answer by elima(1433)

 Question 103054: find an equation in standard form of the ine containing the give points (0,0),(5,-2) Click here to see answer by elima(1433)