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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 323587: what is the answer the X-Y= 4
X-3Y=4

Click here to see answer by JBarnum(2146)

Question 323671: as a financial planner a client comes to you for investment advice after meeting with him and understanding his needs you offer him the following options option1 invest $5000 in a savings account at 6.6% interest compounded monthly option2 invest into an ordinary annunity where 1,100 is deposited each year into an account that earns 4.8% interest compounded annually. set up the formula for compound interest for option 1 and the formula for future value of an annuity for option2 in an excel spreadsheet to calculate the amount earned at the end of 6 years
Click here to see answer by Theo(13342)

Question 324353: the height in feet of an object thrown upward is given by the equation h=80t-16t^2, where h is the height of the object after t seconds. after how many seconds does the object reach it maximum height?
Click here to see answer by stanbon(75887)

Question 324357: solve: log (x-5)=log 20
Click here to see answer by stanbon(75887)

Question 324373: What are the solutions to the equation (x � 2)(x + 4) = 0?
Click here to see answer by JBarnum(2146)

Question 323380: Find the conplete solution of the linear system or show that it is inconsistent:
x + y + z = 4 and x + 3y + 3z = 10 and 2x + y - z = 3
Click here to see answer by Fombitz(32388)

Question 324650: the functions f1(x)=-2(x-3)^4+1 and f2 (x)=-2(x+1)^4-5 are graphed on the same axes. Explain how f2 can be obtained by a translation of f1
Click here to see answer by Fombitz(32388)

Question 324653: f(x)=x^3+2x^2+x-10 give that -1 is a zero of f(x)
Click here to see answer by Fombitz(32388)

Question 324652: Find the fourth term in the expansion (3y-z)^7
Click here to see answer by Fombitz(32388)

Question 325336: From his daily allowance, Eric has saved 74 coins made up of denominations of one peso and five peso . How many of each kind has he if the coins amount to 170 pesos?
Click here to see answer by mananth(16946)

Question 325374: I do not understand how to find the zeros of a function. The following is the problem that is giving me problems.If you could help I would be much appreciative.
f(x)=x^2+3x-10
thanks
becca
Click here to see answer by stanbon(75887)

Question 325380: Ok...here goes...I am attempting to find the sum of the polynomials:
6x^3-2x^4+9 and -2x^4+3x+3
I think this is the way to complete the problem, if at all possible can someone confirm this and if i am wrong please assist me in understanding what I have done wrong...
My thoughts:
write equation
(6x^3-2x^4+9)+(-2x^4+3x+3)combine like terms
6x^3(-2x^4+(-2x^4)+3x+3+9
6x^3-4^4+3x+12
basically resulting in the answer being
-4^4+6x^3+3x+12
I would appreciate any feed back on this problem and thank you in advance for your time and help
Click here to see answer by checkley77(12844)

Question 325952: If the slope of the line is 2 and its y-intercept is 5, what is the equation of the line?
Click here to see answer by solver91311(24713)

Question 326080: How do you find marginal cost if
12 units cost $445; 50 units cost $1585
The linear cost function is writen as c(x)=30x+85
I know the answer is $30.
Also I need to find the average cost per unit to produce 100 units.
I know this answer is $30.85
I just can't figure out how they reached these answers. I have been working on this problem for 2 day.
Click here to see answer by solver91311(24713)

Question 326146: Can you please explain how to factor 36x^2-1. I am drawing a complete blank.
Click here to see answer by solver91311(24713)

Question 326146: Can you please explain how to factor 36x^2-1. I am drawing a complete blank.
Click here to see answer by scott8148(6628)

Question 326144: How would you simplify this?
(x^-7y^11z^14)^-2
Click here to see answer by Fombitz(32388)

Question 326239: 3x+11y=2
Click here to see answer by Fombitz(32388)

Question 326739: solve by the substatution method
5x-3y=-29
4x+33=y
I am looking for the order pair
Click here to see answer by Fombitz(32388)

Question 326738: If I have a triangle and they give me the degrees to two of the angles how do I find the sides?
Click here to see answer by Fombitz(32388)

Question 326742: solve by the substatution method
8x+2y=-16
-4x+y=24
I am looking for the order pair
Click here to see answer by Fombitz(32388)

Question 326776: 5x+3y= -22
-7x+y=36
solve by substatution method
Click here to see answer by Fombitz(32388)

Question 326758: solve by the substatution method
5x+3y= -22
-7x+y=36
I am looking for the order pair
Click here to see answer by Fombitz(32388)

Question 326831: 6-3x=5x-10x+10 I came up with 1 as the answer
Click here to see answer by jessica43(140)

Question 326829: -(8y+3)-(-7y-4)=-3 Would this be correct -8y+3=7y-4=-3 My e-mail is collinscora@yahoo.com
Click here to see answer by jessica43(140)

Question 327885: Solve the following system of nonlinear equations.
y^2+4x=0
x^2-8x+y^2+15=0
Click here to see answer by Alan3354(69443)

Question 327883: Solve the following system of nonlinear equations
25x^2+9y^2=225
x-y=0
Click here to see answer by Edwin McCravy(20054)

Question 327877: Solve the following system of nonlinear equations
y=-x^2-2x+14
y=x^3-6x^2+12x-2
Click here to see answer by Fombitz(32388)

Question 327882: How many solutions can be found in the intervl [-3,3] for the following system of nonlinear equations?
y=x^4+x
y=4^x+4
Click here to see answer by Fombitz(32388)

Question 328149: Solve the following system of nonlinear equations?
y=x^4-2x^3-17x^2+4
y=-3x^4-2x^3+20x^2-5

Click here to see answer by Fombitz(32388)

Question 328160: Solve the following system of nonlinear equations
y=x^4-x^2+2x-1
y=x^4+3x^2+2x-2
Click here to see answer by ankor@dixie-net.com(22740)

Question 328186: Determine the rul for the linear function f given the specified values
f(2)=-1; f(5)=11
A relation is defined by y=3kx/4. if y=30 when x=8 find y when x=6
WHAT IS A FUNCTION!?
Click here to see answer by user_dude2008(1862)

Question 328245: I need to solve this by factoring and I'm terrible at factoring.

My options are: A)8,-9
B)-8,9
C)-8,-9
D)8,9
E)prime equation, cannot be factored
Click here to see answer by user_dude2008(1862)

Question 328152: Solve the following system of nonlinear equations
2xy=3
4x^2-8y^2=1
Click here to see answer by Fombitz(32388)

Question 328159: Solve the following system of nolinear equations
x^2+y^2=3
x^2+y=0
Click here to see answer by edjones(8007)

Question 328492: 6X+3Y=4.5
cONVERT FUNCTION INTO EQUATION AND FIND F(5)
Click here to see answer by Fombitz(32388)

Question 328513: Solve the following system of nonlinear equations
y=x^4-5x^2+x+10
y=-x^4+5x^2+x-4
Click here to see answer by Fombitz(32388)

Question 328515: solve the following system of nonlinear equations
y=x^4-x^2+2x-1
y=x^4+3x^2+2x-2
Click here to see answer by Fombitz(32388)

Question 328454: simplify. 12/2m-12
Click here to see answer by Fombitz(32388)

Question 328514: Solve the following system of nonlinear equations.
y=4x^3-24x^2+4x-4
y=x^3-5x^2-4x+8
Click here to see answer by Fombitz(32388)

Question 328779: 4x+3y=-17
x=-3-2y
(1,-5)
Did I get the right answer? I was to solve using the substitution method
(1,-5)
Click here to see answer by Fombitz(32388)

Question 327876: Solve the following system of nonlinear equations
y=x^4-x^2+2x-1
y=x^4+3x^2+2x-2
Click here to see answer by Fombitz(32388)

Question 329535: what does the y equal in the solution of the system of equations below?
3x-y=1
y-x=-5

Click here to see answer by checkley77(12844)

Question 330054: what equation represents y?
2x � 3y = 23
�1x � y = 1
Click here to see answer by stanbon(75887)

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