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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 253395: F(x)=3x^2-y^4-2x+3x
Click here to see answer by richwmiller(17219)

Question 254712: Use an inequality to represent the sets of real numbers greater than or equal to negative five .
Click here to see answer by solver91311(24713)

Question 254912: solve with a calculator
y^2-4x^2=16
2x^2+y^2=16
i dont know how to do this in the calculator
Click here to see answer by richwmiller(17219)

Question 254881: you are in charge of constructing a fence around the running track at a high school. the fence is to be built around the track so that there is a uniform gap between the outside edge of the track and the fence.
a. what is the maximum width of the gap between the track and the fence if no more than 630 meters of fencing is used? (hint: use the equation for teh circumference of a circle.) two sides of the track are both 100m each the other two sides are both 81m each
Click here to see answer by ankor@dixie-net.com(22740)

Question 255156: please just help me with these two problems I am so confused... but so happy my dad found this website!! I graphed these twice and got a line and when I did it wrong I made my own V shape on the Y axis on purpose.
Thanks!
4. y=|-3x|
40. y=-|x-3|
I have way more problems but I'm hoping if a professional shows me how to do it that well... I might understand it or get how to do this for my other problems. Thanks again!!
Click here to see answer by dabanfield(803)

Question 255437: plz help me define variables and write an equation for each phrase. The length of the trip is 35 minutes plus extra time spent in traffic.
Click here to see answer by rfer(16322)

Question 255587: what is the solution set to:
4x-y=9
x+3y=16
Click here to see answer by palanisamy(496)

Question 255598: Translate into a system of equations:
Burl is twice as old as son. Ten years ago, Burl was three times as old as his son. How old are they now?
Click here to see answer by Theo(13342)

Question 255599: y=3x-18
4x+2y=24
Click here to see answer by palanisamy(496)

Question 243859: farmer adelita has only ducks and cows. he cant remeber how many of each he has but he doesnt need to remeber because he knows he has 22 animals and 22 is also his age. he also knows that the animals have a total of 56 legs and that is also his father age. assuming that each animal has all legs intact and no extra limbs how many of each animal does farmer ben have?
Click here to see answer by Edwin McCravy(20054)

Question 256049: which pattern is not linear a. 1,6,11,16,21,...
b. -1,7,15,23,31,...
c. 1,21,31,41,...
d. 1,3,9,27,81,
Click here to see answer by stanbon(75887)

Question 256059: which pattern is not linear a. 1,6,11,16,21,...
b. -1,7,15,23,31,...
c. 1,21,31,41,...
d. 1,3,9,27,81,
Click here to see answer by drk(1908)

Question 256136: (0,5) , (-2.0)
Click here to see answer by richwmiller(17219)

Question 256136: (0,5) , (-2.0)
Click here to see answer by checkley77(12844)

Question 256239: y=1/4x-1
Click here to see answer by richwmiller(17219)

Question 256430: 2. y=|4x|-1
34. y=|-3x+5|
Click here to see answer by drk(1908)

Question 256548: 3x-2y=10
Click here to see answer by Alan3354(69443)

Question 256629: The x-direction cosine of a line is -5/13 and the y-direction cosine, c2, is positive. What is c2?
Please help.
Click here to see answer by drk(1908)

Question 257431: ��x+7 for x=28
Click here to see answer by checkley77(12844)

Question 257525: b=1/2mv solve for m
Click here to see answer by MRperkins(300)

Question 257940: Can someone please help a Soldier out here. I am not sure how to set up this problem.
Use the fundamental principles of counting or permutations to solve the problem.
An auto manufacturer produces 7 models, each available in 6 different colors, with 4 different upholstery fabrics, and 5 interior colors. How many varieties of the auto are available?
Click here to see answer by Greenfinch(383)

Question 258044: The raw scores on a test range from 22 to 78. The teacher would like to rescale the scores from 60 to 95. Find the linear function that will rescale the scores. What will a raw score of 45 be worth? What raw score will convert to a 90? (round to the nearest whole point)
Click here to see answer by stanbon(75887)

Question 258151: I need to know the x and y intercepts of the problem -x-y=2
Click here to see answer by richwmiller(17219)

Question 258151: I need to know the x and y intercepts of the problem -x-y=2
Click here to see answer by drk(1908)

Question 258389: Determine the shortest distance from (9,5) to 5x + 3y =15
Click here to see answer by stanbon(75887)

Question 258389: Determine the shortest distance from (9,5) to 5x + 3y =15
Click here to see answer by richwmiller(17219)

Question 246351: Please help me solve this linear system with three variables.
2x-y+2z=-21
x+5y-z=25
-3x+2+4z=6
I had attempted to replicate the example.
6x-3y+6z=-62
-6x+4y+8z=12
y+14z=40
3x+5y-3z=75
-3x+2y+4z=6
17y-z=81

Click here to see answer by Alan3354(69443)

Question 258778: 2x-4y=6
2x+y=1

my teacher said to solve this by using substitution but i keep getting the worng answer, help plz :)!
Click here to see answer by Fombitz(32388)

Question 258778: 2x-4y=6
2x+y=1

my teacher said to solve this by using substitution but i keep getting the worng answer, help plz :)!
Click here to see answer by richwmiller(17219)

Question 258777: 2x-4y=6
2x+y=1

my teacher said to solve this by using substitution but i keep getting the worng answer, help plz :)!
Click here to see answer by Fombitz(32388)

Question 258847: the equation is....1/6(x+12)+1=x/3
I believe i use the common denominator 6 to multiply each side?? If so, how do I multiply 6(x/3)?
thank you
gjvasquez@cox.net
Click here to see answer by Fombitz(32388)

Question 258682: Can you just give me how to start this problem -
Find the determinant of the matrix
1 1 1 - - - 1
1 2 2 - - - 2
1 2 3 - - - 3
- - - - - - -
1 2 3 - - - N

Would you expand the whole thing and solve??
Click here to see answer by Fombitz(32388)

Question 259170: Solve each system
x+z=0
x+y+2z=3
y+z=2
Click here to see answer by Fombitz(32388)

Question 259285: x + 2/5 = 2/3 I know the answer is 4/15 (used grade school math to solve it).
but I am having difficulty with the simplification of the lcd
Click here to see answer by richwmiller(17219)

Question 259708: how to solve 6x10exponent4-5000
Click here to see answer by checkley77(12844)

Question 259884: solve each quadratic equation using any technique name the technique -4x2 = 0
Click here to see answer by richwmiller(17219)

Question 259883: solve each linear equation using any technique name the technique 3x/4 + 6 = -12
Click here to see answer by rfer(16322)

Question 259945: (3x^2+2x-3)(x-10)
Click here to see answer by checkley77(12844)

Question 260560: How to sole
y=3x-5
y=-2x+5

Click here to see answer by onlinetutor365.com(14)

Question 260825: can you please add this (3b^2 + 4x -10)+(-b^2 +5x + 6)...oh and this is 12th grade algebra
Click here to see answer by Theo(13342)

Question 260825: can you please add this (3b^2 + 4x -10)+(-b^2 +5x + 6)...oh and this is 12th grade algebra
Click here to see answer by richwmiller(17219)

Question 260834: can you please add this (3b^2 + 4x -10)+(-b^2 +5x + 6)...oh and this is 12th grade algebra
Click here to see answer by stanbon(75887)

Question 260834: can you please add this (3b^2 + 4x -10)+(-b^2 +5x + 6)...oh and this is 12th grade algebra
Click here to see answer by richwmiller(17219)

Question 261601: find the slope of the line that passes through the given points
(2, -9) (3, -9)
Click here to see answer by richwmiller(17219)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760