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

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Question 934915: -6x+6y+42
7x+5y+-4
Click here to see answer by Alan3354(69443)

Question 934920: How can I solve and graph the solution to a line parallel to y=3x-2 that passes through the point (1,-3)
Click here to see answer by josmiceli(19441)

Question 934954: I am utterly confused how to get 24/7. The closest that I got is 24. I do not understand how to get this answer. Can someone make a proof to help me understand?
In the system of equations
x+2y = 5
4x-6y = 9
(a) x = 0
(b) x = 11/4
(c) x = 2
(d) x = 24/7 <--- This is the answer. How do you get it?
(e) x= 5
Click here to see answer by jim_thompson5910(35256)

Question 934007: What is 2x+5y=90
Click here to see answer by Fombitz(32388)

Question 935189: how do you get the intersecting point on a graph?

Click here to see answer by MathLover1(20850)

Question 935204: A sum of $500 is in the form of denominations of $5 and $10. If the total number of notes is 90, find the number of notes of each type.
Click here to see answer by TimothyLamb(4379)

Question 935219: how to model each rule with a table of values and a graph
equation: f(x)=1.5x+3 and f(x)=-x2 +4

Click here to see answer by TimothyLamb(4379)

Question 935219: how to model each rule with a table of values and a graph
equation: f(x)=1.5x+3 and f(x)=-x2 +4

Click here to see answer by MathLover1(20850)

Question 935264: Use a table to find the break-even point. Check your solution.
C=15x + 150
R=45x

Click here to see answer by stanbon(75887)

Question 935171:
Regression equations (i) ) 3y+9x=46(ii) 3x+12y=19Variance of y is = 16.Mean value of x is
Click here to see answer by oscargut(2103)

Question 934307: Determine the equation of the line. Perpendicular to 2x-3y+7=0 and with the same x-intercept as 4x+5y-8=0
Click here to see answer by MathLover1(20850)

Question 935870: what should be subtracted from 2x+3y+7 to get the sum of the terms 3x-2y+3 and 2x+2y-3

Click here to see answer by mananth(16946)

Question 935886: 3x+y=30 & 2x-3y=53
Click here to see answer by Fombitz(32388)

Question 935994: Find the real number f such that the line with the equation 4x-fy+5=0 has y-intercept of 3?

Answer this, PLEASE with complete solution.
Click here to see answer by josgarithmetic(39618)

Question 935995: Find an equation of the line that passes through the origin and is perpendicular to the line passes through (3,1) and (-4,-4)?
Answer please with complete solution
Click here to see answer by Alan3354(69443)

Question 935996: The line with equation 3x+4y=8 make right triangle with coordinate axes.find area of the triangle ?
Click here to see answer by srinivas.g(540)

Question 936416: draw the graph of the linear equation 2x - 3y +7 = 0 and above hence find the coordinate of the point where the line intersect x axis

Click here to see answer by Alan3354(69443)

Question 936500: Bob has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how many are quarters and how many are dimes.
Click here to see answer by Alan3354(69443)

Question 936505: Lou wants to make a coffee mixture to sell. He is going to mix Sumatra coffee which cost $2.50 per pound with Colombian coffee which cost $3.75 per pound. He wants to make 50 pounds of mix and he wants the cost of the mix to be $3.35 per pound. How many pounds of each will he need?
Click here to see answer by ankor@dixie-net.com(22740)

Question 936600: Please help me with these problems, I'm really confused. :( Thank you!
How many solutions do the following systems of equations have? Justify your answer.
a. -2x + 4y = 1, 3x - 6y = 9
b. x + y = 8, 2x + 2y = -1
c. y = (1/2)x - 4, x - 2y = 8

Click here to see answer by josgarithmetic(39618)

Question 936672: Please help me with graphing this on a table of values? 4x + 4y = 2
I already know the answer (0, 1/2) (1/2, 0) but I'm not quite sure how to graph it on the table of values. Thank you! :)
Click here to see answer by ewatrrr(24785)

Question 936704: Which equation shows the substitution method being used to solve the system of linear equations?

x + y = 6
x = y + 5

A.
x = (x � 6) + 5

B.
x + (y + 5) = 6

C.
(y + 5) + y = 6

D.
x + y = y + 5
Click here to see answer by TimothyLamb(4379)

Question 936705: The system of equations is coincident.

What are the missing values?
3x+y=7
9x+__y=__
Click here to see answer by TimothyLamb(4379)

Question 936706: What is the solution to the system of equations?
2x+y=-3
x-2y=-4
Click here to see answer by TimothyLamb(4379)

Question 936706: What is the solution to the system of equations?
2x+y=-3
x-2y=-4
Click here to see answer by Fombitz(32388)

Question 937058: a. Stephen is walking from his house to his friend Sharon's house. When he is 12 blocks away, he looks at his watch. He looks again when he is 8 blocks away and finds that 6 minutes have passed. Write two ordered pairs for these data in the form (time, blocks).
b. Write a linear equation for these two points.
c. What is the total time it takes Stephen to reach Sharon's house?
Click here to see answer by TimothyLamb(4379)

Question 937138: 19x+4y=
Click here to see answer by Fombitz(32388)

Question 937128: Jack charges $30 flat fee and $7 per hour to do handy jobs. Harry charges a flat fee of $15 plus $12 per hour. what is the equation for the two sets of charges and also how do I put this on a co ordinate plane graph
Click here to see answer by ewatrrr(24785)

Question 937355: How do I get y=mx+b out of y=x ?
Click here to see answer by Alan3354(69443)

Question 937371: 11x+6y=21
11x+4y=25
Click here to see answer by TimothyLamb(4379)

Question 937628: A sum of rs 8400 is made up of 50,20,10 and 5 rupee notes. The number of 10 rupee note is five times the number of 5 rupee notes,four times the number of 20 rupee note and ten times the number of 50 rupee note. what is the number of notes in each denomination
Click here to see answer by josmiceli(19441)

Question 937691: The owner of a movie theater was counting the money from 1 days ticket sales. He knew that a total of 150 tickets were sold. Adult tickets cost $7.50 each and children's cost $4.75 each. If the total receipts for the day were $891.25, how many of each kind of tickets were sold?
Click here to see answer by TimothyLamb(4379)

Question 937690: The tickets for a dance recital cost $5.00 for adults and $2.00 for children.If the total number of tickets sold was 295 and the total amount collected was $1,220, how many adult tickets were sold?
Click here to see answer by TimothyLamb(4379)

Question 937689: Sharu has 2.35 in nickels and dimes. If he has a total of thirty-two coins, how many of each coin does he have?
Click here to see answer by TimothyLamb(4379)

Question 937969: Malik canoed against the current for 2 hours and then with the current for 1 hour. Julio traveled against the current for 2.5 hours and with the current for 1.5 hours. If they traveled a total of 9.5 miles against the current and 20.5 miles with the current and the current is going 3 miles per hour how fast do Malik and Julio travel in still water?
Click here to see answer by mananth(16946)

Question 937965: Solve the system by elimination method
x=9y+8
3x+y=-60
Click here to see answer by mananth(16946)

Question 937963: Solve the system by substitution and elimination method
3x+y=4
2y-8=-6x
Click here to see answer by mananth(16946)

Question 937942: Slope of 2/9 passes through (-3,2) in slope intercept form and standard
Click here to see answer by mananth(16946)

Question 937986: Solve by the elimination method
3x+y=4
2y-8=-6x
Click here to see answer by josmiceli(19441)

Question 938135: Select the equation of the line that passes through the point (�2, �1) and has slope 5 in point-slope form.
(y � 1) = 5(x � 2)
(x + 2) = 5(y � 1)
(x � 2) = 5(y + 1)
(y + 1) = 5(x + 2)
Click here to see answer by ewatrrr(24785)

Question 938133: Solve each system by the addition method.
5x - 3y = 23
7x - 4y = 33
Put your answer in ordered pair (x, y) form.
????
Click here to see answer by ewatrrr(24785)

Question 938255: I have a hard time on these kind of equations combine like terms.
7y � 11 � 10y + 3 = 7 and needed some help to break it down and figure it out.
Click here to see answer by josmiceli(19441)

Question 938080: By placing a "4" at the unit's place of a 3 digit number, the value is increased by 4828. what was the original 3 digit number?
Click here to see answer by KMST(5328)

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