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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 114406: find the midpoint of the line segment whose end points are given
(-3/2,-3) and(2,7/2)
Click here to see answer by stanbon(75887)

Question 115252: Use Gauss-Jordan elimination method to solve
2x-5y+5z=17
x-2y+3z=9
-x+3y=-4
I NEED HELP KNOWING HOW TO USE THIS METHOD

Click here to see answer by Edwin McCravy(20054)

Question 115823: Text Book - Beginning and Intermediate Algebra with Applications and visualization. Page 236-288.
Question- The graph of the system 2x+y=5
4x-3y=-5 shows an intersection at the point
(1,3). What does the
intersection mean algebraically?
Click here to see answer by josmiceli(19441)

Question 115888:
(y^3+125)/(y+5)
Click here to see answer by checkley71(8403)

Question 117429: How do you write slope equation with slopes three fourths and y intercep -5
Click here to see answer by psbhowmick(878)

Question 117560: What is the y intercept for this equation:y=x^2+2x-1?
so far:1=x^2+2x
1=x(x+2)
Click here to see answer by jim_thompson5910(35256)

Question 117601: Thank you for helping. I am trying to help my son with his final review.
Solve: -3X^2-5x=4
There are no further directions, such as a method to use
Click here to see answer by jim_thompson5910(35256)

Question 117605: Solve: (10x+9)^2=112
Click here to see answer by jim_thompson5910(35256)

Question 117607: Write the quadratic equation in vertex form. What is the vertex?
y=3x^2+30x+68
Click here to see answer by MathLover1(20849)

Question 117607: Write the quadratic equation in vertex form. What is the vertex?
y=3x^2+30x+68
Click here to see answer by stanbon(75887)

Question 117604: Write a quadratic function in vertex form that has the given vertex and passes through the given point. Vertex (-2, -2) Point (1, -20)
Click here to see answer by solver91311(24713)

Question 118167: Using linear programming

I need an example of this and a way to solve it.
thank you

Click here to see answer by MathLover1(20849)

Question 118166: Solving systems of inequalities

I need an example of this and a way to solve it.
thank you

Click here to see answer by checkley71(8403)

Question 118165: Solving inequalities with two variables

I need an example of this and a way to solve it.
thank you

Click here to see answer by MathLover1(20849)

Question 118164: Solving inequalities with absolute values
I need an example of this and a way to solve it.
thank you

Click here to see answer by stanbon(75887)

Question 118587: solve for z
3x + 4y + z = 11.5
2x - 2y - 3z = 1.5
4x + y - 2z = 12.5
(a) .5
(b) .2
(c) 5
(d) 1.5
Click here to see answer by MathLover1(20849)

Question 119053: s= a+b+c;c
Click here to see answer by jim_thompson5910(35256)

Question 119064: d = rt; r
Click here to see answer by checkley71(8403)

Question 119065: A= 1/2bh; b
Click here to see answer by checkley71(8403)

Question 119068: c= ax - b; x
Click here to see answer by jim_thompson5910(35256)

Question 119070: V= Bh ; B
Click here to see answer by stanbon(75887)

Question 119059: V= Bh; B
Click here to see answer by checkley71(8403)

Question 119174: If Miguel typed 410 words in 5 minutes and received a keyboard speed of 76 words per minute, how many errors did he make?
Click here to see answer by josmiceli(19441)

Question 119213: Why does y=3 represent a function, but x=3 does not?
Click here to see answer by jim_thompson5910(35256)

Question 119188:
c/c+1 minus 4/c+4 plus 3/c�+5c+4

Click here to see answer by stanbon(75887)

Question 119186: 2/a�-2a minus 3/a�-a-2
Click here to see answer by Fombitz(32388)

Question 119440: Find the solution set in interval notation: x+12/x+2 <= 3
Thank you so much!!! :D
Click here to see answer by stanbon(75887)

Question 119460: The relation between the tempature in degrees Celcius is equivalent to the temperture in degrees Fahrenheit is given by the funtion F(C) = 9
___ c+32
5
Find the tempature in Fahrenheit that is equivalent to 15C?
THERE ARE 4 ANSWERS TO CHOOSE FROM
A)14.89
B)59
C)91
D)95

Q25
Click here to see answer by Fombitz(32388)

Question 119654: Factor 2x^3y^2-10x^2y+12xy
IS THIS A polynomial?

Click here to see answer by chitra(359)

Question 119720: Is the operation performed correct ? Explain.
(4x^2 + 6x) / (2x) = 2x + 6

AND CAN YOU PL;EASE SHOW ALL WORK
THANK YOU
Click here to see answer by josmiceli(19441)

Question 119960: 4x+3y=-22
x-3y=2
Click here to see answer by jim_thompson5910(35256)

Question 119961: 4x+3y=-22
x-3y=2
Click here to see answer by jim_thompson5910(35256)

Question 120316: I NEED AN EXAMPLE AND ANSWER BROKEN DOWN AS TO HOW dividing fractions.
THANK YOU
Click here to see answer by solver91311(24713)

Question 120324: Polynomials
Can you please give me an example of Polynomials.
Also can you solve it and give me an answer
Thank You

Click here to see answer by heidi(17)

Question 120515: Hello, can someone please be so kind to help me solve this problem below?
3w/5 -1 = w/2 + 1

Thanks
BW
Click here to see answer by tutor_paul(519)

Question 120518: Hello, can you please help me work out this problem?

Find the list price of if there was a 12% discount and the sale price was $ 4400.00 dollars
Click here to see answer by bucky(2189)

Question 120517: hELLO CAN SOME ONE PLEASE SOLVE THE EQUATION BELOW?
d= D( a + 1)
------------
24
determine the dosage for the child based on this information
D = adult
d = child
adult dossage 600 milligrams and the doctor uses the formula above to estimate childs dosage at 200 milligrams how old is the child?
Click here to see answer by stanbon(75887)

Question 120514: Hello, can someone please be so kind to help me solve this problem below?
3w/5 -1 = w/2 + 1

Thanks
BW
Click here to see answer by jim_thompson5910(35256)

Question 120590: how will i solve 6m-3=21
Click here to see answer by checkley71(8403)

Question 120593: how will i solve 9/2h=-1

Click here to see answer by solver91311(24713)

Question 120593: how will i solve 9/2h=-1

Click here to see answer by checkley71(8403)

Question 120593: how will i solve 9/2h=-1

Click here to see answer by nabla(475)

Question 120732: I'm confused, some of these problems I tried inputting into the solver confused me with the way it was written. There are two that confuse me a lot.
1) First Equation: 2a=8(this is what confuses me for this problem); Second Equation: a+b=2
2) First Equation: 2x+3y=31; Second Equation: y=x+7
Click here to see answer by stanbon(75887)

Question 121037: x divided by 6 plus 4 equals 20
Click here to see answer by madhan_math(34)

Question 121041: 7(2x+6)=1
Click here to see answer by MathLover1(20849)

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