Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 349877: Crazy Sherry's Used Stereos prices their stereos at 40% above what they paid. How much did crazy sherry pay for a stereo that she is selling for $448?
Click here to see answer by rfer(16322)

Question 349964: I am being asked to "Find the linear functions satisfying": F(4)=3 F(-4)=11
I know the two problems should be set up as follows...
3=m(4)+b and 11=m(-4)+b
I also know that you have to find B first but, I don't know how to do this...
Click here to see answer by stanbon(75887)

Question 350022: I need help for this system , can you please help me? I will really appreciate it
1/x + 1/y =6
2x+y=3
I've tried to subtract y and then to solve the system but didnt work .then I 've tried to notate 1/x with a and 1/y with b, but I got stack because I didn't know what should I do with the second equation .
thank you for your help.
daniela
Click here to see answer by scott8148(6628)

Question 350151: Solve the system by substitution, elimination, or graphing:
x-3y=17
5x-15y=81
Click here to see answer by Fombitz(32388)

Question 350156: Solve the system by substitution, elimination, or graphing:
4x-3y=2
3x+3y=-9
Click here to see answer by CharlesG2(834)

Question 350230: write am equation of the line with the given slope and y intercept . Then grapgh it.
m= 5. (0,-3)
Click here to see answer by ewatrrr(24785)

Question 350420: Use substitution to solve the linear system
y=x-3
y=2x
Click here to see answer by jim_thompson5910(35256)

Question 350658: how do I solve 3x+5y+7z=75 for x,y and z?
Click here to see answer by Fombitz(32388)

Question 351033: How do I graph this?
2x < 3y + 6
Click here to see answer by mananth(16946)

Question 351049: (y^2-4)/y�(y+2)/(y+7) I can not figure which way to correctly solve this problem. I need to divide and simplify.
Click here to see answer by edjones(8007)

Question 351032: How do I graph this?
y < 2x + 2
Click here to see answer by Fombitz(32388)

Question 351154: Problem 1. The sum of the digits of a two-digit number is 14. If the digits are reversed, the number is increased by 18. What is the number?
....
Problem 2. One number is less than another number. The sum of the two numbers is four times their difference. What are the numbers?

Click here to see answer by stanbon(75887)

Question 351262: What is the answer to 11/2x - 4/5x = 47/10
Click here to see answer by rfer(16322)

Question 351355: A company produces three types of athletic shirt. A dozen tank tops requires
1 hour on the cutting machine, 2 hours on the sewing machine, and 3 hours
on the packaging machine. A dozen shortsleeve
shirts requires 3 hours on
the cutting machine, 5 hours on the sewing machine, and 5 hours on the
packaging machine. A dozen longsleeve
shirts requires 6 hours on the
cutting machine, 6 hours on the sewing machine, and 8 hours on the
packaging machine. In one week, the cutting machine has a maximum of 21
hours that can be dedicated to these shirts, the sewing machine has a
maximum of 28 hours that can be dedicated to these shirts, and the
packaging machine has a maximum of 35 hours that can be dedicated to
these shirts. How many dozen of each shirt can this company produce in one
week assuming that the machines are used to maximum capacity?
Click here to see answer by stanbon(75887)

Question 351510: What does the solution of a system of linear equations represent? Explain.
Click here to see answer by Fombitz(32388)

Question 351511: How can you tell graphically whether a system is consistent, inconsistent, or dependent? Give an example of each type of equations.
Click here to see answer by Fombitz(32388)

Question 351546: What is the value of x in the system below?
5x + 6y =-24
2x + 3y = 15
Click here to see answer by Fombitz(32388)

Question 351658: 1/x+1/y=8
3/x-5/y=0
how do i solve this system of equations?
Click here to see answer by ewatrrr(24785)

Question 351937: x5y-z=16
3x-3y+2z=12
2x+4y+z=20
i need to solve using the linear combination. please help me i dont get it
Click here to see answer by stanbon(75887)

Question 351952: a piece of fabric 180 inches long is cut into two pieces such that 3 times the larer piece exceeds 4 times the smaler piece by 85 inches.. how large are the pieces?
I thought 3x+85+4y = 180
but i have not clue. help me please its for my daughter shes 13 i want to get ths for her.
Click here to see answer by jim_thompson5910(35256)

Question 351976: You want the cover of a sports media guide to show two photos across it's width, the cover is 6.5 inches wide, and the left and right margins are 3.75 each. The space between the photos is .5 inches, how wide should you make the photos?
Write an equation to model the problem.
Click here to see answer by checkley77(12844)

Question 352206:
Suppose you need to solve a system of equations in which both equations represent lines. How many solutions can your system have? Select ALL that are possible.
3, 0, infinitely many, 4, 1, 2
How many solutions does the following system of equations have?
-x-3y=3
x-6y= 5
Click here to see answer by sofiyac(983)

Question 352224: solve the following non-linear system of equations.
x^2 + 2y^2 = 3
x - y^2 = 0
Click here to see answer by jim_thompson5910(35256)

Question 352237: Find the domain and range of the function.
F(x)=x+1
Click here to see answer by Fombitz(32388)

Question 352237: Find the domain and range of the function.
F(x)=x+1
Click here to see answer by jim_thompson5910(35256)

Question 352290: If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state it.
a-2b=3
3a=6b+9
I have tried working these three seperate times, I cannot figure it out. I am beginning to think there is no solution. Thank you for you're time and assisstance.
Click here to see answer by scott8148(6628)

Question 352272: A page of a school yearbook is 8 1/2 inches by 11 inches. The left and right margins are 1 inch and 2 1/2 inches, respectively. The space between pitures is 1/4 inch. How wide can each picture be to fit 3 across the width of the page?
Click here to see answer by checkley77(12844)

Question 352468: 6y+5x=-6 ?
Click here to see answer by nyc_function(2741)

Question 352572: Solve the system of equations
3x+6y-z=7
3x-3y+5z=-12
9x+9y-2z=12

Click here to see answer by Fombitz(32388)

Question 352577: Each of two brothers can wash a car in 1 hour; however their sister can wash the car in 45 minutes.If all three work together, how long will it take to wash the car?
Click here to see answer by nerdybill(7384)

Question 352010: 100 patients expect a 30% increase in weekly increments, determine the amount of patients per week - father of a sophmore!!! Looking for a formula....
Click here to see answer by sofiyac(983)

Question 352689: Find three solutions of the equations and graph it.
y=-3/2x+2
Click here to see answer by sofiyac(983)

Question 352710: How do I solve this equation...
5x + y = 12
3x + y = 10
Do I add 5x and 3x together to get 8x? And the same with y to get 2y? I am not sure how to work these problems
Click here to see answer by Fombitz(32388)

Question 352717: graph each equation using the intercept method.
15y+5x=-15
Click here to see answer by Fombitz(32388)

Question 352717: graph each equation using the intercept method.
15y+5x=-15
Click here to see answer by sofiyac(983)

Question 352741: graph the line that passes through the given point and has the given slope.
(5.-3) m=3/4
Click here to see answer by Fombitz(32388)

Question 352817: Write the slope intercept form of the equation: x-y=6
Click here to see answer by jim_thompson5910(35256)

Question 351905: Question:Solve the equation find the value of y for each valueof x??
y+3x=8;x=-2,0,2
Click here to see answer by nyc_function(2741)

Question 352895: How do you determine to use subsitution or elimination?
Click here to see answer by nyc_function(2741)

Question 352238: Find the domain and range of the function.
y=x2
Click here to see answer by nyc_function(2741)

Question 353149: Not sure how to solve this problem...
-3x + 2y = -14
5x + 6y = -42

Can anyone help me understand this.. Thank you
Click here to see answer by Fombitz(32388)

Question 353152: -5x = -5y + 75
x = -4y + 25
I am so confused on how to work this problem
Click here to see answer by Alan3354(69443)

Question 353267: Write equation in slope-intercept form.
3x + 2y = 10
Click here to see answer by Fombitz(32388)

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