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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 422893: solve the system of equations by graphing. Then classify as consistent or inconsistent and as dependent or independent.
8x-5y=-25
5y-8x=25
Click here to see answer by lwsshak3(6460)

Question 423658: What would the vertex of this equation be f(x) = x2+10x+9 ??
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Question 423838: Is 3x-2y=5 and 2y=3x+7 consistent?
Click here to see answer by Alan3354(30955)

Question 424037: solve by the substitution method.
9x+5y=-29
x=24-6y
Click here to see answer by mananth(12270)

Question 424297: solve each system of equations using the substitution method 11x+16y=922x+3y=18
Click here to see answer by mananth(12270)

Question 424291: solve each system of equations using the substitution method 5x+6y=-75x-3y=146
Click here to see answer by mananth(12270)

Question 424571: how do i solve 2x-3y=-25
3x+y=1 by substitution

Click here to see answer by stanbon(57214)

Question 424815: Solve the following equation. Then place the correct number in the box provided.
3y + 5 10

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Question 424943: what is the equation of the line passing through the points (1,3) and (-3,8)
yours sincerely luke
Click here to see answer by mananth(12270)

Question 424971: i need your help in solving this equation: using comparion method
y=2x-3
y=-1/2x+4
and this one using substitution method
x-2y=3
2x-3y=y
thank you so much, ana

Click here to see answer by MathLover1(6612)

Question 425530: What is a Linear Equation

Click here to see answer by richard1234(5390)

Question 425809: Consider the system:
{ y=3x+2
{9x-3y=-6
Click here to see answer by linh117(31)

Question 426042:
Find the midpoint of (-9,3) and (5,-2). Express your answer as an ordered pair with no spaces.
Click here to see answer by ewatrrr(10682)

Question 426296: which kind of function best models the data in each table? choose an equation to model the data.
x/y
-1/2.2
0/0
1/2.2
2/8.8
3/19.8
possible answers:
linear y=2.2x
quadratic y=2.2x^2
exponential y=2.2^x
Click here to see answer by solver91311(16868)

Question 426377: Having trouble with order of operations and understanding how to get to the answer which is -3. Thanks.
(2a-3)/6 = 2a/3+1/2
Click here to see answer by edjones(7569)

Question 426631: What is the answer to this system of equations? x+y=6
-x+3y=-2
Click here to see answer by ewatrrr(10682)

Question 426674: 1. Find the slope and y-intercept of each line whose equation for the line with the given slope that contains the given point. m = -3; (-2,-1)

2. y = -3/8 x+4 Find the slope and the y-intercept of each line whose equation is given
Click here to see answer by ewatrrr(10682)

Question 426682: Find the solution of this system of edquations

6x = 90 + 3y
X - 3y = 50
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Question 426894: 5x-2y=20
Click here to see answer by edjones(7569)

Question 427340: the graphs of the two lines 4x = 3y + 23 and 4y + 3x = -19
A. do not intersect.
B. intersect at (-2,5).
C. are identical.
D. are perpendicular.
Click here to see answer by sudhanshu_kmr(1152)

Question 427709: Use a graph to solve the following system of equations, "by the method of graphing:"
-x+y=-4 and x+y=-2
Thank you for your help!
Click here to see answer by ewatrrr(10682)

Question 427984: 0.1x+0.7y=-2.3
0.3x-0.2y=2.3
solve the system using substitution method
Click here to see answer by mananth(12270)

Question 428116: -4x - 5y - 8z = 268
-10x + 7y + 6z = -786
-12x + 9y - 2z = -548
I could really use some help on this problem. Thanks!!
Click here to see answer by stanbon(57214)

Question 428320: i need help with a couple problems the 1st is 4x-8y=16
Click here to see answer by tony.slattery(3)

Question 428377: 2x+y=41

Click here to see answer by Alan3354(30955)

Question 428381: 5x + 4y = 40
x + 2y = 11
Click here to see answer by mananth(12270)

Question 428587: Solve for x and what is the common denominator? There should be a line under each top number. Thank you

1 + 3 = 2
4x 2x x+1

Click here to see answer by stanbon(57214)

Question 428696: I know how to solve for X and Y in linear systems of equations using SUBSTITUTION. My teacher wants us to use ELIMINATION. The tool on this site asks me to check "Elimination or Substitution", but even when I ask it to use elimination--it solves my problem by substitution! I don't get the difference!! ex problem:
7x + 4y = 2
7x + 2y = 8
My answer is x=2 y=-3 Which I got by isolating 7x in each equation, then setting 2 equations equal to each other 2-4y = 8-2y
Click here to see answer by htmentor(788)

Question 428739: 2/3x+3/5y=-17
1/2x-1/3y=-1
solve using elimination
Click here to see answer by John10(245)

Question 428739: 2/3x+3/5y=-17
1/2x-1/3y=-1
solve using elimination
Click here to see answer by stanbon(57214)

Question 428760: x-3y==-14
x-y=-2
Click here to see answer by checkley79(3039)

Question 429066: solve each system using graphing, substitution, or linear combination y=-x+3 and y=x+1
Click here to see answer by ewatrrr(10682)

Question 429179: . Solve the following system of equations.

3x + 4y = 4
2x + y = 6

2. Solve the following system of equations.

2x - 3y = 13
5x + 2y = 4

3. The Kraft Co. manufactures computer chips at a variable cost of $4 per chip and sells them for $10 each. If the fixed cost is $12,000 per month, what is the number of chips they would need to produce at the break-even point?

4. The Sunshine Bakery sells pies at a fixed price of p dollars per pie. The total number of pies demanded daily, D, is related to the price, p, in dollars by the equation:

D = -10p + 200

On the other hand, the daily supply of pies, S, is related to the price, p, per pie by the equation:

S = 15p - 50

Determine the equilibrium price of pies; that is, the price at which the supply, S, and demand, D, are equal.

Click here to see answer by ewatrrr(10682)

Question 429238: 3x+y=16
2x+y=11
Click here to see answer by ewatrrr(10682)

Question 429409: You invested money in two funds. Last year, the first fund paid a dividend of 8% and the second a dividend of 5%, and you received a total of $1330. This year, the first fund paid a 12% dividend and the second only 2% and you received a total of $1500. How much money did you invest in each fund?
Click here to see answer by mananth(12270)

Question 429501: A hotel has 200 rooms. Those with kitchen facilities rent for $100 per night and those without kitchen facilities rent for $80 per night. On a night when the hotel was completely occupied, revenues were $17,000. How many of each type of room does the hotel have?
Click here to see answer by mananth(12270)

Question 429500: How many gallons of cream containing 25% butter fat and milk containing 3 1/2% butter fat must be mixed to obtain 50 gallons of cream containing 12 1/2% butter fat. And also how much cream and how much milk to the nearest hundredth of a gallon must b mixed together to obtain 50 gallons of cream that contains 12.5% butterfat?
Click here to see answer by mananth(12270)

Question 429472: How many gallons of cream containing 25% butter fat and milk containing 3 1/2% butter fat must be mixed to obtain 50 gallons of cream containing 12 1/2% butter fat. And also how much cream and how much milk to the nearest hundredth of a gallon must b mixed together to obtain 50 gallons of cream that contains 12.5% butterfat?
Click here to see answer by mananth(12270)

Question 429471: How many gallons of cream containing 25% butter fat and milk containing 3 1/2% butter fat must be mixed to obtain 50 gallons of cream containing 12 1/2% butter fat. And also how much cream and how much milk to the nearest hundredth of a gallon must b mixed together to obtain 50 gallons of cream that contains 12.5% butterfat?
Click here to see answer by mananth(12270)

Question 429556: how can i solve this problem using the elimination method for systems x-6y=44 2x-7y=53
Click here to see answer by mananth(12270)

Question 429363: what are the steps to solving this equation:
2v-3 over 5 is greater than or equal to 7

Click here to see answer by Alan3354(30955)

Question 429738: I'm working with a difference quotient problem. I haven't taken math for awhile and I'm having trouble with simplifying, though. Here's what I need to simplify:
-6x(x+h)^2+8(x+h)+5-(-6x^2+8x+5)
I understand that the next step includes a 12xh, and I have no clue where that's coming from. Thanks for your help!
Theresa
Click here to see answer by stanbon(57214)

Question 429767: I need Help, can someone please explain to me what this question is asking and please give an example of the solution to it.
Describe the three possible relationships between two lines (i.e. system of equations) and what each indicates about the solution to the system.
Click here to see answer by richard1234(5390)

Question 429904: piece of wire 42 cm long is bent into a rectangle whose length is twice its width. Find the dimensions of the rectangle.
Click here to see answer by htmentor(788)

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