# 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 279202: find the slope of the line containg the point (2,5) and (4,9) Click here to see answer by stanbon(57219)

 Question 279203: what is the equation in standard form of the line (4,1) and (-2,3) Click here to see answer by stanbon(57219)

 Question 279206: find the equation of X- intercept 4 and Y- intercept 8 Click here to see answer by richwmiller(9135)

 Question 279207: find the equation of the line that passes through (4,3) and is parrallel to to the line 3x-y=7 Click here to see answer by Alan3354(30959)

 Question 279698: Don't know what kind of question this is.... Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 90 minutes. How quickly can all three fill the pool together? (Answer is 15 minutes - I have no clue how to even start!) Click here to see answer by nerdybill(6948)
 Question 279698: Don't know what kind of question this is.... Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 90 minutes. How quickly can all three fill the pool together? (Answer is 15 minutes - I have no clue how to even start!) Click here to see answer by mananth(12270)

 Question 280304: 4 x- 1/2 < 5x/2 - 5 , can you tell me how to do this sum please ! and can you explain to me how you did it . tanx Click here to see answer by stanbon(57219)

 Question 280582: How much 70% alcohol solution must be mixed with a 30% alcohol solution to produce 60 liters of a 40% alcohol solution?  Click here to see answer by oberobic(2304)

 Question 281764: Find an equation of the line that contains the given point and is perpendicular to the given line. (-7,-8), x+5y=15 Thank you. Click here to see answer by subudear(55)
 Question 281764: Find an equation of the line that contains the given point and is perpendicular to the given line. (-7,-8), x+5y=15 Thank you. Click here to see answer by richwmiller(9135)

 Question 282372: solve the system of equations. 3x+4y+z=7 2y+z=3 -5x+3y+8z=-31 im not sure how to do this. i would greatly appreciate any help. thank you Click here to see answer by Alan3354(30959)

 Question 282514: x+y=1 x-y=1 linear equation problwn [ i could nt find anything else ] Click here to see answer by Alan3354(30959)

 Question 282517: Linear equations w/ substitution . . . . y=3x and x+y=8 Click here to see answer by oberobic(2304)

 Question 284049: solve this system of equations algebraically : x^2+y^2=25, 4y=3x Click here to see answer by hello_me(3)

 Question 284333: You have been asked to analyze the cost of creating applications for the ePhone and SmrtPhone. The cost, C, in dollars, for creating an application for the ePhone is given by the function C(x) = 4x + 92 and the cost for creating an application for the SmrtPhone is given by the function C(x) = 3x + 108, where x is the number of hours needed to complete the application. Answer the following questions and be sure to show work on the steps for calculating. What is the cost for both the ePhone and SmrtPhone if 28 hours is used? If the cost of creating the application is \$300, compare the hours that would be needed for the ePhone application versus the SmrtPhone? Click here to see answer by richwmiller(9135)
 Question 284333: You have been asked to analyze the cost of creating applications for the ePhone and SmrtPhone. The cost, C, in dollars, for creating an application for the ePhone is given by the function C(x) = 4x + 92 and the cost for creating an application for the SmrtPhone is given by the function C(x) = 3x + 108, where x is the number of hours needed to complete the application. Answer the following questions and be sure to show work on the steps for calculating. What is the cost for both the ePhone and SmrtPhone if 28 hours is used? If the cost of creating the application is \$300, compare the hours that would be needed for the ePhone application versus the SmrtPhone? Click here to see answer by stanbon(57219)

 Question 284604: you can rent a car a day from company A for \$49 plus \$o.10 a mile or from company B for\$29 plus\$o.18 a mile. Formulate a systems of equation that can be used to help make a decision about which country to rent from. let x = number of miles and y= total cost of car. Click here to see answer by richwmiller(9135)

 Question 285085: How do I solve j=3m-24? I should know this but cant remember. Thanks Click here to see answer by richwmiller(9135)

 Question 285348: what does x = in this open sentence 3x+12=13 Click here to see answer by rfer(12644)

 Question 285674: Show true of false: If S and T are subspaces of a vector space V, then S U T is a subspace of V. Click here to see answer by richwmiller(9135)

 Question 286755: sketch a graph of a equation y+5x=6 and find the x-intercept as a ordered pair Click here to see answer by checkley77(12569)

 Question 286792: Explain in 50 words why the line x=7 is a vertical line. Click here to see answer by CharlesG2(828)

 Question 287677: What is the domain of g(x)=-3 over (2x-4) Click here to see answer by richwmiller(9135)

 Question 287681: A large three-topping pizza costs \$15.60. For each additional topping, the cost increases by \$2.00. To determine the coste of any large pizza, what slope shold be used to write the function? Click here to see answer by richwmiller(9135)

 Question 287679: Given f(x)=-2x to the 3 power and g(x)=4x-5, find g (f(-1)) Click here to see answer by stanbon(57219)

 Question 287802: 3/(x+1) +4/(x-2)=(px+q)/(x+1)(x-2) What is the value of p and q? Click here to see answer by mananth(12270)

 Question 288473: a man has 20 coins consisting of dimes and quarters. if the dimes were quarters and the quarters were dimes, he would have ninety cents more than he has now. how many dimes and quarters does he have? Click here to see answer by ankor@dixie-net.com(15624)

 Question 288619: Given f(3)=12 and f(5)=-2, find f(one seventh). a. 5 and one seventh b. 18 and one seventh c. 32 d. 34 Click here to see answer by richwmiller(9135)

 Question 288616: Given f(x)=x to the second power+2 find f(a=2)-f(a) a. 4a+4 b. 4a+8 c. 2 d. 4 Click here to see answer by user_dude2008(1861)

 Question 288989: A warehouse manager is shipping an order made up of 2-pound and 5-pound bags of flour . The total weight of the order is 140 pounds . The equation below discribes this situation . 2x + 5y = 140 If the number of 2-pound bags ,x,is 30 , what is the number of 5-pound bags , y? Click here to see answer by nyc_function(2733)

 Question 289377: a motor boat goes 5 miles upstream in the same time it requires to go 7 miles downstream. if the river flows at 2 mph, find the speed of the boat in still water. Click here to see answer by mananth(12270)

 Question 289736: Soybean meal is 16% protein. Cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320- pound mixture that is 13% protein?? How many pounds of cornmeal?________ How many pounds of soybean meal??_______ Click here to see answer by ankor@dixie-net.com(15624)

 Question 291828: how do you solve two equations with variables on both sides? y + 1/2 = -1/3(x + 1/2) Click here to see answer by richwmiller(9135)

 Question 291929: What is the answer if you solve each system of equation by substitution? 4y+3x=-3 y=5x-5 Click here to see answer by richwmiller(9135)
 Question 291929: What is the answer if you solve each system of equation by substitution? 4y+3x=-3 y=5x-5 Click here to see answer by stanbon(57219)

 Question 294043: I have two questions: Simplify [(x³)³ ] / [(x²)³] Click here to see answer by richwmiller(9135)