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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 787313: Solve the system by the substitution method.
5x-2y=3
10x-4y=5
Click here to see answer by oscargut(2103)

Question 787583: We are learning how to translate a sentence into an equation or vice versa and there is one problem I do not understand. It is: Translate each sentence into an equation-One third the product of the length of the side squared and the height is the volume of a pyramid with a square base. That is confusing me and I have no idea what it means of how to do it. I really need help. Thank you so much!
Click here to see answer by ankor@dixie-net.com(22740)

Question 788226: Write a system of two equations in two variables to solve the problem.
On a mother's 21-mile commute to work, she drops her daughter off at a child care center. The first part of the trip is 9 miles less than the second part. How long is each part of her morning commute?
first part mi
second part mi

Click here to see answer by josgarithmetic(39617)

Question 788416: solve the problems using the substitution method step by step
1.) x + 3y = -2, -4x - 5y = 8
2.) 3x + 2y = 10, 2x - y = 9
Got stuck on these two problems and I'm trying to understand how to do it correctly. I Tried a couple of times for both but end up getting confused.
Click here to see answer by solver91311(24713)

Question 788503: Solve the system by the elimination method.
2x-y=2
4x+y=10
Click here to see answer by Alan3354(69443)

Question 788534: i need help what is the formula to surface area...??
Click here to see answer by Alan3354(69443)

Question 788540: i need help what is the formula to surface area... please this is worth like 1000 points in our algebra class please respond ASAP

Click here to see answer by Alan3354(69443)

Question 788795: solve the linear equation 2x+3y=1,5x+7y=3
Click here to see answer by mananth(16946)

Question 788836: The Modern Grocery has cashews that sell for $4.25 a pound and peanuts that sell for 2.75 a pound. How much of each must Albert, the grocer, mix to get 60 pounds of mixture that he can sell for 3.00 per pound.
Click here to see answer by josgarithmetic(39617)

Question 788948: Solve the equation 2X+4y=10and3X+6Y=15
Click here to see answer by stanbon(75887)

Question 788980: Jelly beans and mints, worth $2.10/kg and $2.70/kg respectively, were mixed to make 500kg of mixture, which sold for $2.52/kg. How many kilograms of jelly beans were sold?
Click here to see answer by mananth(16946)

Question 789021: hi i wanna know about satisfies a liner funcation
like this question i dont know how to solove it
(5,1),(4,4),(3,9),(2,16),(1,25)
and have a nice bye
Click here to see answer by KMST(5328)

Question 789098: Can someone help me solve this?
Solve the system by the substitution method.
4x+2y=-8
2x+y=-4
Click here to see answer by jim_thompson5910(35256)

Question 789093: Can someone help me solve this?
Solve the system by graphing both equations on the same axes. Give the ordered pair for the point of intersection.
5x+5y=8
x=4-y
Click here to see answer by KMST(5328)

Question 789094: Can someone help me solve this?
Solve the system by graphing both equations on the same axes. Give the ordered pair for the point of intersection.
4x+2y=-8
2x+y=-4
Click here to see answer by KMST(5328)

Question 789653: Can someone help me solve this?
Solve the system by the elimination method.
8x-5y=32
4x+5y=4
Click here to see answer by MathLover1(20850)

Question 789702: Can someone help me solve this?
On an algebra test, the highest grade was 44 points more than the lowest grade. The sum of the two grades was 140.
Find the highest grade.
Click here to see answer by stanbon(75887)

Question 789711: Can someone help me solve this?
Ben wants to blend gummy worms welling for $1.60 a pound with Hot Tamales selling for $2.50 a pound to get a mixture that will be sold for $1.90 a pound. How many pounds of each candy should be used to get 30 pounds of the mixture?
Click here to see answer by KMST(5328)

Question 789268: A and B are riding bicycles on perpendicular roads. Suppose that A is 9km from the intersection and riding toward it at 20 kph, and B is 7km from it riding away from it at 25kph. After how many hours will they be 13km apart?
Click here to see answer by ankor@dixie-net.com(22740)

Question 790131: Can someone help me solve this?
Solve the system by the elimination method.
5x-2y=3
10x-4y=5
Click here to see answer by solver91311(24713)

Question 790174: Can someone help me solve this?
Answer the following question.
How many points of intersection does an "inconsistent system" have?
Click here to see answer by rfer(16322)

Question 790191: Can someone help me solve this?
Answer the following question.
If you graph two linear equations that are dependent, how many points of intersection will the graph have?
Click here to see answer by rfer(16322)

Question 790195: Can someone help me solve this?
Answer the following question.
How many points of intersection would the graph of 2 independent equations have?
Click here to see answer by stanbon(75887)

Question 790206: Can someone help me solve this?
Answer the following question.
Solve the system by the substitution method.
x-y=6
y=-2-x
Click here to see answer by rfer(16322)

Question 790206: Can someone help me solve this?
Answer the following question.
Solve the system by the substitution method.
x-y=6
y=-2-x
Click here to see answer by stanbon(75887)

Question 790232: Can someone help me solve this?
Solve the system by the elimination method.
3x-5y=1
6x-10y=4
Click here to see answer by stanbon(75887)

Question 790223: Can someone help me solve this?
Answer the following question.
Answer the following question about the system
7x+5y=2
8x-9y=17
If we multiplied the second equation by 5, what number would we have to multiply the first equation by to eliminate the y terms?
Click here to see answer by edjones(8007)

Question 790337: Solve for x

T=R/Z+x
Click here to see answer by jim_thompson5910(35256)

Question 790431: Solve the linear inequality. Use interval notation to express the solution set.
-6(5x+7)< -36x-6

Click here to see answer by Cromlix(4381)

Question 790885: nine books are to be bought by a student.Some cost $6 each and the remainder cost $6.50 each. if the total amount spent was $56, how many books at each price are bought?
Click here to see answer by Cromlix(4381)

Question 791130: Can someone help me solve this?
Type of Problem: Applications of Linear Systems
Solve the following problem.
The Nile River is 394 kilometers longer than the Amazon River. The two rivers have a total length of 12,986 kilometers. How long is each river?
Click here to see answer by Cromlix(4381)

Question 791140: Can someone help me solve this?
Type of Problem: Solving Systems of Linear Equations By Graphing
Solve the system by graphing both equations on the same axes. Give the ordered pair for the point of intersection.
2x-3y=-6
y=-3x+2
Click here to see answer by rothauserc(4718)

Question 791147: Can someone help me solve this?
Solve the system by the elimination method. First simplify equations, and clear it of fractions.
x/3+3y/4=-3
x/3-y/4=5
Click here to see answer by solver91311(24713)

Question 791149: Can someone help me solve this?
Type of Problem: Applications of Linear Systems
Solve the problem by using a system of equations.
The school student council voted to go to a baseball game for their annual trip. They bought 30 tickets. Some of the tickets cost $21 each, and some cost $27 each. The total cost of all the tickets was $696. How many of the $21 tickets did they buy?
Click here to see answer by rothauserc(4718)

Question 791153: Can someone help me solve this?
Type of Problem: Applications of Linear Systems
Solve the problem by using a system of equations.
Amy can buy 3 sandwiches and 4 iced teas for $22.25. She can buy 1 sandwich and 3 iced teas for $9.50. Find the cost for 1 sandwich and 1 iced tea.
Click here to see answer by rothauserc(4718)

Question 791157: Can someone help me solve this?
Type of Problem: Applications of Linear Systems
Solve the problem by using a system of equations.
A Porsche and a VW Bug that were 450 miles apart traveled toward each other. They met after 5 hours. If one car can travel twice as fast as the other car, what were their speeds?

Click here to see answer by josgarithmetic(39617)

Question 791320:

I have been trying to use substitution to solve the system. I do as I was taught and on the first equation subtract 6y from both sides to find my X equation. Every time I plug in x=2-6y I keep getting y=0 which is not correct because I have checked. I also get x=2. No matter how many times I work it the answer is still the same. I would like to know how you get the correct answer, which is in the back of my math book, (8, -1) Thank you.
Click here to see answer by jim_thompson5910(35256)

Question 791741: Determine whether the system of linear equations has (a) one and only one solution, (b) infinitely many solutions, or (c) no solution. Find the solution, if one exists.
5x - 4y = -7
-10x + 8y = 14
Lost and confused. I have read and watched lectures on this but cannot figure it out. Thanks for the help.
Doug
Click here to see answer by solver91311(24713)

Question 791853: 4(2-x)=21 sove for x please :)
Click here to see answer by wilft1(217)

Question 791859: 3(x+2)=21 solve for x thankyou
Click here to see answer by wilft1(217)

Question 791851: 5/x =0.2
Can you please slove x for me thank you !
Click here to see answer by waynest(281)

Question 792193: find the solution for this system
2x+3y=-8
6x+2y=4
Thank you
Click here to see answer by Alan3354(69443)

Question 792319: Can someone help me solve this step by step?
Solve the system by the elimination method. First simplify equations, and clear it of fractions.
5x-y=-14+2x+y
7x+9y+4=3x+8y
Click here to see answer by Alan3354(69443)

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