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

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Question 119213This question is from textbook McDougal Littell Algebra II

: Why does y=3 represent a function, but x=3 does not? This question is from textbook McDougal Littell Algebra II

Click here to see answer by jim_thompson5910(13787)

Question 119188:
c/c+1 minus 4/c+4 plus 3/c²+5c+4

Click here to see answer by stanbon(26259)

Question 119186: 2/a²-2a minus 3/a²-a-2
Click here to see answer by Fombitz(2113)

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(26259)

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(2113)

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(3003)

Question 119960: 4x+3y=-22
x-3y=2
Click here to see answer by jim_thompson5910(13787)

Question 119961: 4x+3y=-22
x-3y=2
Click here to see answer by jim_thompson5910(13787)

Question 120316: I NEED AN EXAMPLE AND ANSWER BROKEN DOWN AS TO HOW dividing fractions.
THANK YOU
Click here to see answer by solver91311(5072)

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(424)

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(1732)

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(26259)

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(13787)

Question 120590: how will i solve 6m-3=21
Click here to see answer by checkley71(8405)

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

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

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

Click here to see answer by nabla(412)

Question 120732This question is from textbook Algebra 1
: 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+7This question is from textbook Algebra 1

Click here to see answer by stanbon(26259)

Question 121037: x divided by 6 plus 4 equals 20
Click here to see answer by madhan_math(30)

Question 121037: x divided by 6 plus 4 equals 20
Click here to see answer by Fombitz(2113)

Question 121041: 7(2x+6)=1
Click here to see answer by MathLover1(1183)

Question 121041: 7(2x+6)=1
Click here to see answer by bucky(1732)

Question 121040: 5(x-4)=12
Click here to see answer by checkley71(8405)

Question 121039: 3(x+2)=6
Click here to see answer by checkley71(8405)

Question 120209: V=R(1/x squared-1/y squared)solve for y
v=r((1/x^2)-(1/y)^2)
v/r=x^-2 - y^-2
(v/r)-(x^-2)=-y^-2
(x^-2)-(v/r)=y^-2
y=((x^-2)-(v/r))^(-1/2)

Click here to see answer by woneuniceyoo(1)

Question 121390: The sum of three numbers is 26. Twice the first minus the second is two less than the third. The third is the second minus three times the first. Find the numbers.
X+Y+Z=26
Click here to see answer by stanbon(26259)

Question 120187: The surface area of a lake is 25,000,000 sq. feet. A plant currently covers 1,000 sq. feet of surface area and is doubling every month. Write an equation that represents the growth pattern of this plant and explain what the variables and numbers in the equasion represent, then make a graph of the equasion.
Click here to see answer by stanbon(26259)

Question 121686: i have a wksht ???..can you still help me?
Solve the following system of equations:
4x-y=3
2x+3y=5
i got x=-7/9
y=-29/7
i dont think what i have is right

Click here to see answer by stanbon(26259)

Question 121684: umm..well my question is on a wksht..hopefully you can still help me.please?
well here it goes..
solve for x:
m/x=t/m
i got x=m*2-t for my answer

Click here to see answer by jainenderkapoor(60)

Question 121687: I have a question on a story problem...
Mary has a total of $4.75 in her bank. There are 39 coins in all: some are dimes are some are quarters. How many coins of each are there in her bank?
please
d+q=39
10d+25q=475

Click here to see answer by stanbon(26259)

Question 121843: this question is from a wksht...can you still help me?
2x-y-z=2
-x+3y+z=-1
2x-4y-3z=-5
i started the problem and for y i got -5/7 and -32/7 for z...i dont think that is right

Click here to see answer by solver91311(5072)

Question 121891This question is from textbook
: A copy machine can copy a report in 30 mins. When a second copy machine is used at the same time, the copying can be sone in 18 min. How long would it take the second copu machine to do the copying alone?
i have:
x=30
x+y=18
that would be -12..not right?
This question is from textbook

Click here to see answer by ankor@dixie-net.com(6691)

Question 122231: if i have a parametric matrix and i want to find parametric Eigenvectors and Eigenvalues....what i have to do??? and these Eigenvectors and Eigenvalues are still parametric or i have to equal them????
thanx
Click here to see answer by Fombitz(2113)

Question 122452This question is from textbook
: how do I write the solution in set interval notation
7x<14 and 1-x<4This question is from textbook

Click here to see answer by oscargut(682)

Question 123329: how do i solve 2x-6y= -12
Click here to see answer by MathLover1(1183)

Question 123991: I have to solve each system by the addition method, and if a unique solution does not exist, state whether the system is inconsistent or dependent. I have no clue how to do these and I am hoping someone will help me.
x+2y+z=2
2x+3y+3z=-3
2x+3y+2z=2
Click here to see answer by ankor@dixie-net.com(6691)

Question 124095: The length of a rectangular garden is 7 ft. more than twice its width. If the perimeter of the garden is 56 ft., find the width of the rectangle.
Click here to see answer by PBMathandscience(9)

Question 124775: Write f(x) as a product of three linear factors

f(x)= x^3 -4x^2 -7x +10
Click here to see answer by solver91311(5072)

Question 124795This question is from textbook Algebra 2
: Write an equation for the line containing the indicated points.
(-6,-6) and (-3,1)This question is from textbook Algebra 2

Click here to see answer by jim_thompson5910(13787)

Question 125122: the following system is dependent. Solve system showing the solution in terms of z
X - Y + Z = 3
X - 2Y - Z = 5
Click here to see answer by ilana(236)

Question 125473: This is a question concerning least squares. I was asked to derive the math for fitting a straight line to a set of data points with unequal error bars. I don't know how to do this. Please help!
Thanks
Click here to see answer by stanbon(26259)

Question 125502: please show me how to work this problem
find all the zeros of the function and write the polynomial as a product of linear factors
h(x)=x^3-11x^2-15x+325
Click here to see answer by scott8148(3382)

Question 125942: The question on the worksheet is Write and inequality using x and y to represent the restriction due to tribal customs.The information they give me is: Each one of them can gather food for up to twelve hours a day, Each hour hunting will yield six units of food while each hour gathering will yield four, Tribal customs require that for each hour hunting at least two hours must be spent gathering. Please help me!
Click here to see answer by stanbon(26259)

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