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

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Question 11924: what is 8x-6=3x+9
Click here to see answer by elima(1433)

Question 12022: If y-intercept=5, and x-intercept=-3. What is the slope?
Thx in advance.
Click here to see answer by rapaljer(3610)

Question 11216: 9. What is the slope of the line whose equationis 3x-4y=7?
a. 3/4
b. -3/4
c. -4/3
d. -3

Thank you so much!!!!
Click here to see answer by rapaljer(3610)

Question 12357: I am having some problem in sinplifying equetions
can you give me the general rule of that.
Click here to see answer by rapaljer(3610)

Question 12450: `please help me solve this problem.(Also show me the steps please)
Solve the system using any algebraic method
x + y + 2z =5
x + 2y + z = 8
2x + 3y - z = 1
Thanks for helping me solve this problem.
KAt ''.
Click here to see answer by slksil001(7)

Question 11867: How could I create a slope-intercept form if I am given this information: x int = 3, y int = 2. The only equation I could find to use was y-2 = m(x-3). Is this the correct form to use?
Click here to see answer by Kelsi(2)

Question 11104: x-5<8
Click here to see answer by Kelsi(2)

Question 12549: Hi, I'm having some trouble with the concept of linear operators. I think of them as functions on sets, but still can't imagine actual examples. Given the properties of linear operators, these should be simple ones (though I still haven't come up with answers), so I'm hoping you can give me some ideas to help me grasp the linear operator a bit better. Here we go! 1) I'm looking for a linear operator from V->V such that T^2=0 but T does not =0. Then, 2) Given two linear operators (say, T, U) from V-> V, I'm looking for TU=0 but UT does not =0. The generality of T and U just really throws me off for some reason. Thanks again for your time. I really appreciate it.
Click here to see answer by khwang(438)

Question 10359: -288=12b

Click here to see answer by cconrad5(1)

Question 13186: the length of a rectangle is 7 m less than twice the width, if the length is decreased by 1 m and the width by 4 m, the perimeter will be 66 m. find the dimensions of the original rectangle.
Click here to see answer by akmb1215(68)

Question 13246: what is 9+p<14
Click here to see answer by elima(1433)

Question 13263: Please help me with this problem. I don't know what it is!!
3(w+y-z)+4x(x+2x-y+w)
My dad said he will buy your program if it will help
Click here to see answer by kusha(21)

Question 13206: 3x+6y=14
x+2y=3
Click here to see answer by smik(40)

Question 13372: 6-2x+3-(4x-1)=-2x+2
Click here to see answer by elima(1433)

Question 13380: -(8a - 4b) + 5 - 3(4b + 2) - 8
Click here to see answer by akmb1215(68)

Question 13383: 5-3[4-(5 + 2)] - 9
Click here to see answer by akmb1215(68)

Question 13602: Here is the queston:
how do I set up the equation?
A collection of coins is worth $7.50. There are nickles, dimes and quarters with twice as many dimes as there are nickles. Altogether there are 70 coins. how many nickles, dines, and quarters are in the collection?
Click here to see answer by LilSkittleMd(119)

Question 13785: You decide to build a box that is 4 feet long ,5 feet wide, and 8 feet high. The distance from the top left front corner to the top righ tback corner is ? feet.
The distance from the bottom left front corner to the top right back corner is ? feet.
Click here to see answer by Earlsdon(4898)

Question 13794: I'm not sure which number I should divide by.
One light-year is approximately 9.46x10^15 meters. Approximate the time in minutes for light to travel from the sun to Earth if that distance is approximately 1.50x10^11.
Click here to see answer by longjonsilver(2297)

Question 13931: I am having a hard time finding the slope of 6x+7y+5=0. x intercept is -5/6 and y intercept is -5/7. So the straight line of the slope is?

Click here to see answer by Earlsdon(4898)

Question 13936: The temperature where Fahrenheit and Celsius are equal is at what degree?

Click here to see answer by rapaljer(3610)

Question 13985: The distance of the point (3,0) from the line
Click here to see answer by longjonsilver(2297)

Question 13984: The Point (0,1) has the distance of ? , From the line defined by
Click here to see answer by longjonsilver(2297)

Question 14316: what is the answer to this
Click here to see answer by LilSkittleMd(119)

Question 14188: A rectanguliar field is 5 times as long as it is wide, with a perimeter of 288 yards. (Please help!!)

Thank you in advance:)
Click here to see answer by elizabeth2005(20)

Question 14364: I need the natural number for
Click here to see answer by Earlsdon(4898)

Question 14435: I need to find an equation for a line whose points are (3,6) and (5,7). I have found the slope which is 1/2 and know the equation should be in the form of Y= mx + b. But I don't understand how to calculate the value of b. Please help.
Click here to see answer by atif.muhammad(135)

Question 14444: We say Zm= Zn X Zp How to prove this
Click here to see answer by khwang(438)

Question 14467: 0.0009255=9.255E ?
0.000000005317=5.317E ?
Click here to see answer by venugopalramana(3286)

Question 14460: I dont understand how to get the answers to 8^(5/3) and 27^(4/3)
Click here to see answer by Earlsdon(4898)

Question 14445: Determine which one of the following values of x is not a solution of the inequality.
0< (x+5)6 <2 The x+5 is actually over the 6 I hope I typed it right!
A. 6
B. 0
C. -4
D. -8

Click here to see answer by elima(1433)

Question 14735: How to you find the caresian coordinat of x and y point when the coordinates of the point have equal absolute value, the point is in the second quardrant, and the distance of the point from the origin is 2? I don't understand please help
Click here to see answer by venugopalramana(3286)

Question 14734: I totally need help!!!! I don't understand how to get the distance of point (-3,4) from the line y=-2x+2.
Click here to see answer by venugopalramana(3286)

Question 14967:
x=?
Click here to see answer by Earlsdon(4898)

Question 14967:
x=?
Click here to see answer by tjnw79(57)

Question 14982: A 10 foot plank is used to brace a basement wall during construction of a home. the plank is nailed to the wall 6 feet above the floor the slope of the plank is ??.
Click here to see answer by rapaljer(3610)

Question 14981: YOu have a 5 foo ladder , and you lean it against a wall such that the bottom of th eladder is 3 fee away from the wall. the top of the ladder touches the wall at a height of ?? feet.
Click here to see answer by rapaljer(3610)

Question 14983: You have two boxes of the same shape that hold flour. The larger box holds twice as much flour as the smaller one. You conclude that it would take you ?? times as much paint to paint the lager box then it would take you to paint the smaller box.
Click here to see answer by rapaljer(3610)

Question 15128: Let T be a linear operator on V.
Tv1= -v1-v2 and Tv2= v1-3v2 where (v1,v2) is a basis for V.
a) Find the characteristic and minimal polynomial.
b) Find all the linearly independent eigenvectors.
c) Find a jordan basis for T and exhibit the jordan form.
Click here to see answer by khwang(438)

Question 15125: Let T be a linear operator in V. Prove that T^2 = 0 if and only if the range T is a subset of null T.
Click here to see answer by khwang(438)

Question 14818: I need help: I have the formulas I just do not know how to apply them correctly. Here is the problem it is 9 ? out of : given points p(-1,2) and n(5,-7)...find (1) the midpoint. (2) the distance (3) the slope (4) slope of a line parallel to segment pn (5) slope of a line perpendicular to segment pn (6) slope-intercept form of the equation the line (7) point-slope form of the equeation of the line (8) standard form of the equation of the line (9) graph the points....Thanks
(1) midpoint --I can do...-1+5/2= 4/2 =2 2+-7/2= -5/2= -5/2 (2, -5/2)
(2) distance-
(3) the slope y2-y1/x2-x1= -7-2/5- (-1)= -9/6=-3/2
Click here to see answer by venugopalramana(3286)

Question 15127: A^T denotes the transpose of a matrix A.
Show that = Tr(B^T,A) defines an inner product on R^(n x n)
Let U be the set of symmetric 2 x 2 matrices with real entries. U is subspace of R (2x2). Find an orthonormal basis of U with respect to the above inner product.
Click here to see answer by khwang(438)

Question 15263: Sarah is visting a friend about two miles away from her house. she sees a hot-air balloon directly above her house. Sara estimates that the angel of elevation formed by the hot-air balloon is about 15 degrees. about how high is the hot-air balloon?

Click here to see answer by rapaljer(3610)

Question 15262: Sarah is visiting a friend about two miles away from her house. She sees a hot-air balloon directly above her house. Sara estimates that the angle of elevation formed by the hot-air balloon is about fifteen degrees. About how high is the hot-air balloon?
Click here to see answer by tennis_math(7)

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