# 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 399878: At a basketball game, adult's tickets were sold at 1\$ each and the students tickets were sold at 75 cent each. If 150 tickets were sold and 140\$ was collected. How many tickets of eacj kind were sold? Click here to see answer by robertb(4012)

 Question 400830: I am working on the following. 3x=-5y+4 250+150x=300 Do I reduce/simplify the numbers (250, 150, and 300)? Thank you. Click here to see answer by rfer(12660)

 Question 400630: let{u1,u2....uk}be a linearly independent set of vector in R^n and c1,c2,....ck are scalars. prove that {c1u1, c2u2....., ckuk}is also limearly independent. Click here to see answer by robertb(4012)

 Question 401564: i have a graph,the following graph shows the depriciation for a corprate airplane from 2006 to 2009. the plane was purchases new in 2006;therefore,x=0 represents the year 2006. x-axis(horizontal)= years starting from 0=2006 and increasing by 0.5 years Y-axis(vertical)= price in \$ amounts A) list the coordinates of two points on the graph in (x,y) form? (1.0__,_228000____), (__3.0,_204000___) B) Find the slope(rate of depriciation) of this Line C)Find the equation of this line in slope-intercept form.. Click here to see answer by stanbon(57347)

 Question 401586: i tried to answer the question but i cant i had help to get the equation y=(2000/3)x=(4000/3)x=22666.67 anwser being b=22666.67 Y=mx+b 228000=(4000/3)(1)+b , now i need to figure out if the rate of depritation continues at the present rate,what will he value be in 2017 slope = (208000-204000)/(3-1)=4000/3 if i may plz ask for help on one more! i have an equation of p(50)=-0.3(60)^2+60(50)-1500 im not sure if it right? i need to find the profit if 50 awards sre sold P(x)=-0.3^2=fx-m \$60 id desighn fee,studio rent is \$1,500 would the equation be P(x)=-0.3x^2+60x-1500? Click here to see answer by stanbon(57347)

 Question 401583: graph the equations on the same graph by completing the tables and plotting the points. A) y=-2x+7 use the table to find at least 3 points using any values for x B) y_x^2-4x Please help i dont even know where to begin? Click here to see answer by stanbon(57347)

 Question 402010: graphing y= -2/3x + 3 is the -2/3 both numbers negative Click here to see answer by rfer(12660)

 Question 402149: how to solve word problems that includes time and distance Click here to see answer by sofiyac(695)

 Question 402373: sketch the solution to each system of inequalities 5x-2y<-6 x+2y<-6 Click here to see answer by stanbon(57347)

 Question 404180: how would I solve these please. 3*(-7)*(-3)*3= -2*(-2.8)= -(a+59)= -18 divided by 2= 17-3(-5)+7= Click here to see answer by MathLover1(6634)

 Question 404738: Write two different inequalities of the form ax +b> c such that one has a solution of x > -5 and the other has a solution of x<1/2. Click here to see answer by stanbon(57347)

 Question 405560: A bathtub that intially holds 57 gallons of water starts draining at 10 gallons per minute. Construct a function W(t) for the volume of the water (in gallons) in the tub after t minutes. Click here to see answer by ankor@dixie-net.com(15652)

 Question 408069: Solve this system of equations If I had to guess, I would say that it has to do with the square root of 25 and 64, but I can't remember how to get the x or y out of the exponent. Click here to see answer by richard1234(5390)

 Question 408072: A 30 liter solution is 80% antifreeze. How much water should be added to produce a solution that is 60% antifreeze? I want to cross multiply, but that seems to easy. Click here to see answer by robertb(4012)

 Question 408475: Complete the ordered pair so that it is a solution to the equation. 27x+4y=22 {4/9,} Click here to see answer by ewatrrr(10682)

 Question 408483: If (1,b) is a solution of the equation 3x-2y=11, what is b? I tried 3x-2y=11 and I keep coming up with different answers and I'm confused. Click here to see answer by ewatrrr(10682)

 Question 408637: If a ball is dropped from 214 ft above the ground, how long does it take to reach ground level? (Round your answer to two decimal places.) Click here to see answer by ankor@dixie-net.com(15652)

 Question 408760: Evaluate the function f(x) = -x^2 + 5 for x = 4 Click here to see answer by rfer(12660)
 Question 408760: Evaluate the function f(x) = -x^2 + 5 for x = 4 Click here to see answer by stanbon(57347)
 Question 408760: Evaluate the function f(x) = -x^2 + 5 for x = 4 Click here to see answer by jim_thompson5910(28595)

 Question 409041: Y=-1/6x -3 This is a negative fraction I always get mixed up on negative and postive rules involving adding, subtracting, multiplying, and division. Y = a negative 1/6x and -3 Click here to see answer by MathLover1(6634)

 Question 409404: I stuck on a question what functions are not linear functions? 2x=3y3-5 y4=2x=7 x2+y2=16 y=x Click here to see answer by sofiyac(695)

 Question 409569: Four years ago Melina was twice as old as Phoebe. In four years, Phoebe will be three-fourths of Melina's age. Find Melina and Phoebe's ages now. Click here to see answer by stanbon(57347)

 Question 410212: My homework is in Solving Formulas. The teacher did not explain the problems. Me homework is: F = ma, for a Could you please give me a detailed example of how to figure out this formula? Thank you! Click here to see answer by solver91311(16885)
 Question 410212: My homework is in Solving Formulas. The teacher did not explain the problems. Me homework is: F = ma, for a Could you please give me a detailed example of how to figure out this formula? Thank you! Click here to see answer by josmiceli(9680)

 Question 411655: Can someone please show me how to solve A poster is in the shape of a right triangle with a base that is three feet longer than the height. If the area of the triangle is 90 square feet, find the height. a. 9' b. 12' c. 15' d. 18' Click here to see answer by stanbon(57347)

 Question 411661: If one of you has a moment can you please help. A ball is propelled upward from ground level. After t seconds, its height in feet is a function defined by f(t)=-16t^2 + 96t. After how many seconds will it reach a height of 144 feet? a. 2 seconds b. 3 seconds c. 4 seconds d. 6 seconds Click here to see answer by josmiceli(9680)

 Question 411921: Solve the following linear equation by using gauss elimination x+3y+4z=7 3x+9y+7z=6 Click here to see answer by stanbon(57347)

 Question 412961: A gas station sells 4820 gallons of regular enleaded gasoline on a day when they charge \$1.35 per gallon, whereas they sell 3883 gallons on a day that they charge \$1.40 per gallon. Find a linear function that expresses gallons sold a function of price. Click here to see answer by josmiceli(9680)

 Question 413775: whats the slope of a line that has an equation of y=4x-3 Click here to see answer by rfer(12660)

 Question 414788: a bus is to be chartered for the senior class trip. the basic fare is \$9.50 per passenger. If more than 20 people go everyone's fare is reduced by \$0.30 for each passenger over this number (20). At least how many people must go to make the fare less than \$7.50 per passenger? Click here to see answer by josmiceli(9680)