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

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Question 60860: The sum of two numbers is 39. Their difference is 11. What are the two numbers?
Click here to see answer by consc198(59)

Question 60861: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the cost of a pack of gum.
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Question 60859: Solve the system by addition or substitution. 4x – y = –3 y = 4x + 8
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Question 60858: Solve the system by substitution. x + y = 12 y = 2x
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Question 60799: Solve the system by addition. 5x – 3y = 13
4x – 3y = 11
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Question 60857: Solve the system by addition. 5x – 8y = –14 x – 2y = –6
Click here to see answer by checkley71(8405)

Question 60856: Solve the system by addition. 5x – 3y = 13 4x – 3y = 11
Click here to see answer by praseena(37)

Question 60896: how can i solve the system by graphing.
x + y = 4
–x + y = 2

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Question 60905: Fully Factor.
1. 3a^2-36a+36
2. 4(x-3)^2 - 9(x+4)^2
Help
Click here to see answer by joyofmath(189)

Question 60922This question is from textbook beginning algebra
: 21. 3x+5y=15
23. -4x+3y=12
25. x-7y=3 I am not sure how to solve with 2 variables. please help me!!!This question is from textbook beginning algebra

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Question 60950: Instructions: Solve each system by the substitution method.
What is the solution for 6x+9y=6
2x=2-3y
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Question 60950: Instructions: Solve each system by the substitution method.
What is the solution for 6x+9y=6
2x=2-3y
Click here to see answer by joyofmath(189)

Question 61001This question is from textbook Algebra 1
: Evaluate the function for the given value of x. then graph the function.
29. f(x)=x-7 when x=-2
30. f(x)=-x+4 when x=4
31. f(x)=2x+6 when x=-3

32. f(x)=1.5x-42 when x=-9This question is from textbook Algebra 1

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Question 61008: how can i solve the system by graphing.
2x + y = 4
x + y = 3

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Question 61015: A motorcycle manufacturer produces three different models: the Avalon, the Durango, and the Roadtripper. Production restrictions require it to make, on a monthly basis, 10 more Roadtrippers than the total of the other two models, and twice as many Durangos as Avalons. The shop must produce a total of 490 cycles per month. How many cycles of each type should be made per month?
I just don't know how to set it up!!!! Thanks in advance!
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Question 61020: Instructions: Solve each system by the elimination method.
What is the solution for 5x-y=5
-5x+2y=0
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Question 61027: Instructions: Solve each system by the substitution method.
What is the solution for 4x-y=-3
y=4x+3
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Question 61035: Given f(x) = x2 – 3x + 9, find f(0).
Click here to see answer by funmath(2873)

Question 61036: Rewrite the equation 2x – 3y = –6 as a function of x
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Question 61042: Instructions: solve each system by the eliminsation method.
What is the solution for x-y=4
x-y=-3
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Question 61079This question is from textbook Intermedidaten Algebra
: "Arctic Antifreeze" is 18%alchol and "frost No-More" is 10%alchol. How many liters of each should be mixed to get 20L of a mixture that is 15% alchol?This question is from textbook Intermedidaten Algebra

Click here to see answer by uma(370)

Question 61080This question is from textbook Intermediate Algebra
: A community water tank can be filled in 18hr by the town office well alone and in 22hr by the high school will alone. How long will it take to fill the tank if both wells are working?This question is from textbook Intermediate Algebra

Click here to see answer by uma(370)

Question 61081This question is from textbook Intermediate Algebra
: The HP officejet 6110 takes twice the time required by the Canon Imageclass D680 to photocopy brochures for the New Bretton Arts Council year-end concert. If working together the two machines can complete the job in 24min, how long would it take each machine, working alone to copy the brochures?This question is from textbook Intermediate Algebra

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Question 61082This question is from textbook Intermediate Algebra
: E-chem Testing has a solution that is 80% base and another that is 30% base. A technician needs 150L of a solution that is 62% base. The 150L will be prepared by mixing the two solutions on hand. How much of each should be used?This question is from textbook Intermediate Algebra

Click here to see answer by uma(370)

Question 61037: Solve the system by addition. –3x – 4y = –2
x + 3y = –6
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Question 61093This question is from textbook Intermediate Algebra
: The current in ther lazy river moves at a rate of 4mph. Monica'sdinghy motors 6mi upstream in the same time it take to motor 12mi downstream. What is the speed of the dinghy?This question is from textbook Intermediate Algebra

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Question 61119: If a = 4 and b = –1, evaluate 5a – b.
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Question 61120: Find the mean.–5, –2, 2, 4, 14, 17
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Question 61123: Find the slope and the y-intercept. y = –9x + 8
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Question 61100: Instructions: Solve each system by the substitution method.
What is the solution for 3x+y=-7
x-y=-5
Click here to see answer by jai_kos(139)

Question 61122: Solve. –4(x + 10) + 2x = 3x + 0
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Question 61124: Write the equation of the line with slope -1/2 and y-intercept (0, 3). Then graph the line.
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Question 60931: 10X-3Y=30
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Question 61121: Solve. 10x – 4 – 5x = 6 + 3x – 8
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Question 61136: Instructions: Solve each equation by the elimination method.
What is the solution for 4x+2y=3
y=-x
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Question 60943This question is from textbook College Algebra
: I haven't been successfull figuring this one out. Can anyone help?
2x + y = 0
x + 1.5y = 4.5
Solve the system of linear equations. Thank You!This question is from textbook College Algebra

Click here to see answer by jai_kos(139)

Question 61094: PLEASE HELP SOLVE
FOR EACH PAIR OF FUNCTIONS, FIND (A)(F+G)(X) AND (B) (F-G)(X)
SOLVE: F(X)=5X-10, G(X)=3X+7
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Question 61094: PLEASE HELP SOLVE
FOR EACH PAIR OF FUNCTIONS, FIND (A)(F+G)(X) AND (B) (F-G)(X)
SOLVE: F(X)=5X-10, G(X)=3X+7
Click here to see answer by praseena(37)

Question 61215: -4/6z + 2=30, I need to help my son write this out and be able to explain the steps to him. thanks in advance for the help
Click here to see answer by checkley71(8405)

Question 61213: 1.2=3w + 1.8
We understand that 1.8 is subtracted from both sides, but confused about whether we should cancel out the 3 and how. Thanks in advance
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Question 61292This question is from textbook algebra 1
: 6-2(x+5)=19This question is from textbook algebra 1

Click here to see answer by joyofmath(189)

Question 61234: hi. i need help.
it say's that you need write it in standard form (Ax+By=C).
this is what i have done so far.
1.(-4,1);(-2,-1)
y-2=-1-2/1-(-4)(x-(-4)

Click here to see answer by tutorcecilia(2042)

Question 61363: Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?
Click here to see answer by stanbon(26268)

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