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

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Question 195611: sketch the following functions
y=3x+2

Click here to see answer by jim_thompson5910(35256)

Question 195945: Find all the solutions of the following systems of equations if possible. If a system has no solution, explain why it does not.
(a) 3X � Y = 3 (b) 2X � Y = 1 (c) 2X � Y = 1
3X +Y = 15 2Y � 4X = 3 2Y � 4X = (-2)

Click here to see answer by jim_thompson5910(35256)

Question 196059: I am trying to help my son with Graphing Linear equations. It has been about 20 years since I have done this. Could you explain how to do this one problem to me and so I can help him understand what to do?
y=2x+0
slope=
y-intercept
solution= ( , )
Click here to see answer by Alan3354(69443)

Question 196173: Certain number of students planed to go for a picnic. Tht total expense was estimated to be Rs.3600-. But 15 students could not go. Each student participated had to pay Rs.8/- more. Then howmany students participated in the picnic
Click here to see answer by josmiceli(19441)

Question 196421: Need Help In Problems Now! Thank You
Click here to see answer by Alan3354(69443)

Question 196595: Solve this system using the Substitution Method:
x + y = 7/2
4x - 3y = -14
Click here to see answer by jim_thompson5910(35256)

Question 196603: Donna invested her $33,000 bonus and received a total of $970.00 in interest after one year. If part of the money returned 4% and the remainder 2.25% then how much did she invest at each rate?
Click here to see answer by checkley77(12844)

Question 196630: How can you solve the following system of euqations for x?
2x+y=7
x-y=2
Click here to see answer by jim_thompson5910(35256)

Question 196746:
Click here to see answer by christo(3)

Question 196972: A group of 52 people attended a ball game. There were three times as many children as adults in the group. Set up a system of equations that represents the numbers of adults and children who attended the game ans solve the system to find the number of children who were in the group.
Click here to see answer by Mathtut(3670)

Question 197117: Solve the following system of equations algebraically:
x^2+y^2=100
y=x-2
Click here to see answer by ankor@dixie-net.com(22740)

Question 197168: When using the subtitution maethod:
3x+y=7 2x-5y= -1
7-3x=y so, 2x- (7-3x)= -1
now I get lost...
do I... Divide both sides by 2? 2x- (7-3x)= -1 x- (7-3x)= -1/2 ???
Subtract?

Click here to see answer by jim_thompson5910(35256)

Question 197186: y = 4x-2
y = 5x
Click here to see answer by jojo14344(1513)

Question 197239: solve by the elimination method
2x+3y=1
4x+6y=2
Click here to see answer by jim_thompson5910(35256)

Question 191178: who created the concept of using algebraic methods to solve linear systemsby using elimination??
Click here to see answer by solver91311(24713)

Question 197355: Solve the system of equations by graphing.
7x-9y=-18
9y-7x=18
Is the system consistent or inconsistent?
Click here to see answer by jim_thompson5910(35256)

Question 197357: Solve by the substitution method
2x+5y=3
X=9-5y

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Question 197356: Solve the following system of equations.
X+9y=5 (1)
X=4-9y (2)
What is the solution of the system?

Click here to see answer by jim_thompson5910(35256)

Question 197443: Hi!
I am having trouble putting the following equation into proper form. My assignment was to create two equations that would fit the intergers 4,9. I chose for my first equation: 2x+3y=35. The other equation and the one I am having trouble with is 52=4x-4y. I thought when I put the second equation into the form ax+by=c my answer would be 4x+4y=52. I am wrong. Can you please help me? Thank you in advance. Lynne
Click here to see answer by jim_thompson5910(35256)

Question 197571: Solve the system.
2x-3y=3
5x+2y=17
Click here to see answer by jim_thompson5910(35256)

Question 197921: 2x + 3y = 8 and 3x + 2y = 7

Click here to see answer by Ratman99(5)

Question 197921: 2x + 3y = 8 and 3x + 2y = 7

Click here to see answer by jim_thompson5910(35256)

Question 197997: A first number plus twice a second number is 5. Twice the first number plus the second totals 4. Find the numbers.
Click here to see answer by jim_thompson5910(35256)

Question 198064: In a triangle, the sum of the interior angles is 180 degrees. If angla A is three times as large as angle B, and angles B and C sum to 90 degrees, what is the measure of each angle?
Click here to see answer by solver91311(24713)

Question 198080: I really have been confused for a while on this question and can't seem to figure it out.
Find the solution of the system of equations by graphing.
-5x + y = -5
-4x+ 2y = 2
I tried to graph it and I got the point (2,6). I don't know if I did it right or wrong but I need help thank you.
Click here to see answer by stanbon(75887)

Question 198092: How do I solve -5/3v+4/3=4/7-5/7 ? And can you explain it? thank you
Click here to see answer by stanbon(75887)

Question 198141: 7. Consider again the car described in Exercise 6. On about what percentage of the trips will your gas mileage be above 43 miles per gallon?

Click here to see answer by Edwin McCravy(20056)

Question 198232: If 5x-6y = -123 and 3x + 13y = -107, what is the value of x and y?
Click here to see answer by jim_thompson5910(35256)

Question 198241: y=x-7
2y-x=-10
what is the solution to the above system of equations ?
thank you.
Click here to see answer by jim_thompson5910(35256)

Question 198238: A man goes into a grocery store and buys a grapefruit and a toy ball. A 7% tax is applied to the price of non-food items. If the total bill is $5.15, including $0.18 in tax on the toy ball, what are the prices of the grapefruit and the ball?
Click here to see answer by anantha(86)

Question 198244: Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have?
Click here to see answer by RAY100(1637)

Question 198243: An express and local train leave GraysLake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
Click here to see answer by anantha(86)

Question 198240: On the first day of school, the percentage of boys in a particular class is 60%. During the school year, six girls move away, and are replaced in the class by six boys; this makes the class roster 75% boys. Find the number of boys and girls in the class on the first day of school.
Click here to see answer by anantha(86)

Question 198271: x+y=7
x-y=1
Solve the system of equations by graphing. Then classify the system.
Use the graphing tool to graph the system. If both equations yield the same line, graph the line twice.
Click here to see answer by arallie(162)

Question 198292: I need help with this one that is using the substitution method.
7m+n=48
m-6n=13

Click here to see answer by jim_thompson5910(35256)

Question 198292: I need help with this one that is using the substitution method.
7m+n=48
m-6n=13

Click here to see answer by arallie(162)

Question 198242: Walt made an extra $9000 last year from a part-time job. He invested part of the money at a 9% annual rate of interest, and the rest at an 8% annual rate of interest. At the end of the year, he made a total of $770 in interest. How much was invested at 8%?
Click here to see answer by checkley77(12844)

Question 198335: I need to help using the substitution method for
9x+4y=-32
x=1-5y
any help would be great
Click here to see answer by jim_thompson5910(35256)

Question 198340: Which one is more linear? 644.2x-1e+06, 1019.7x-2e+06,8454.8x-2e+07 This was done on excel.
Click here to see answer by stanbon(75887)

Question 198364: This question has been confusing me and I really need some help. Thank You!
Find the solution of the system of equations by graphing.
y=-x+9
y=4x-1
Thank you again!
Click here to see answer by arallie(162)

Question 198374: Solve the system of equations by graphing
x-y=2
x+y=6

Click here to see answer by arallie(162)

Question 198374: Solve the system of equations by graphing
x-y=2
x+y=6

Click here to see answer by jim_thompson5910(35256)

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