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

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Question 288924: my homework paper say to graph each equation and tell whether it is linear
Click here to see answer by alegriajoy33(14)

Question 288977: Write each equation in standard form using only integers.
y + 2 = -3(x - 1)
Click here to see answer by rfer(16322)

Question 279540: The scenario below can be represented by a system of equations. Show representations that can be used and respond to the question:
�A review has 25 questions worth 100 points. The test consists of free response worth 10 points each and multiple choice worth 4 points each. How many multiple choice are on the test?�
Thanks for any help.

Click here to see answer by nyc_function(2741)

Question 289081: Find the value of b that makes the system of equations have the solution (3,5)
y=3x-4
y=bx+2
Click here to see answer by dabanfield(803)

Question 289081: Find the value of b that makes the system of equations have the solution (3,5)
y=3x-4
y=bx+2
Click here to see answer by richwmiller(17219)

Question 289089: find the coordinates of the point of intersection of the graph of the equations x=3 and y=-5
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Question 289111: Graph f(x)<= x^2-x-1
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Question 289127: If the first step in the solution of the equation -8 - 7x = -5x - 10 is "add 10," then what should the next step be?
If the first step in the solution of the equation -x + 6 = 5 - 3x is "subtract 5," then what should the next step be?
If the first step in the solution of the equation 2x - 8 = 5x + 3 is "subtract 2x," then what should the next step be?

13x + 7 = 5x - 20 Solve for X
Click here to see answer by brucewill(101)

Question 288912: x+y=0,3x+y=4 Solve by substitution

Click here to see answer by richwmiller(17219)

Question 289238: Dear Professor,
i would very much appreciate it if you could help me solve the following algebra problem.
thanks
solve the system of equations,using substitiution or eliminationor back-substitution etc.
x+3y-z=13
2x -5z=23
4x-y-2z=4
Click here to see answer by richwmiller(17219)

Question 289403: the line 2x-3y=19 passes through the point
Click here to see answer by alegriajoy33(14)

Question 289355: 2x� -3x -1 = 0
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Question 289355: 2x� -3x -1 = 0
Click here to see answer by Deina(147)

Question 289499: This is driving me nuts. Can I please get your help!!!!!
The Everton College store was paid $1986 for an order of 50 calculators. The store paid $9.00 for each sciuentific calculators, The others, all graphing calculators, cost the store $57 each. How many of each type of calculator were ordered?
Scientific_____
praphing_______
Click here to see answer by Grinnell(63)

Question 289497: {lease help me with this story problem. I am so confused!
The hockey team gets 2 points when they win and 1 when they tie. One season, a team won a championchip with 56 points. They won 10 more games than they tied. How many wins and how many ties did the team have???
Click here to see answer by Fombitz(32388)

Question 289582: A chef is using a mixture of two brands of Italian dressing. The first brand contains 7% vinegar, and the second brand contains 11% vinegar. The chef wants to make 320 milliliters of a dressing that is 8% vinegar. How much of each brand should she use?
Click here to see answer by richwmiller(17219)

Question 289444: I hate word problems, but here it goes.
The owner of a tea shop wants to mix three kinds of tea to make 100 oz of a mixture that will sell for $0.83 per oz. He uses Orange Pekoe, which sells for $0.80 per oz, Irish Breakfast, for $0.85 per oz, and Earl Grey, for $0.95 per oz. If he wants to use twice as much Orange Pekoe as Irish Breakfast, how much of each kind of tea should he use?
So far these are the equations I have come up with:
x + y + z = 100
0.80x + 0.85y + 0.95z = 0.83
x = 2y
I plugged in x = 2y into the first equation, like this:
2y + y + z = 100
But I still need to get rid of the z. So I add 2y + 1y and solve for z, which gives me z = -3y + 100 and then I plug it into the first equation again, so that I get this: 2y + y + -3y + 100 = 100
But it cancels out. What am I doing wrong? How do I solve this problem?
Click here to see answer by ankor@dixie-net.com(22740)

Question 289498: PLease help me with this!!!!
The perimeter of a rectangle is 186 inches. The length exceeds the width by 65 inches. Find the length and the width.
the length is____
the width is___
Click here to see answer by ankor@dixie-net.com(22740)

Question 289723: could you help me solve and graph this equation for x and y please 1100.18=35.74x-0.03y
Click here to see answer by stanbon(75887)

Question 289748: could some please help me graph xintercept(-10,0) y intercept(0,5) and x intercept(7,0) y intercept(0,6)
Click here to see answer by solver91311(24713)

Question 289748: could some please help me graph xintercept(-10,0) y intercept(0,5) and x intercept(7,0) y intercept(0,6)
Click here to see answer by richwmiller(17219)

Question 289925: Solve system of equations, then classify
4x+y=16
5x+6y=1
Click here to see answer by Fombitz(32388)

Question 289908: The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these products exist.
A is 3 � 3, and B is 3 � 3.

Click here to see answer by Fombitz(32388)

Question 290141: When graphing the system y is greater than or equal to -2x-1 and y is less than -4 what quadrant does the overlap occur?
Using the graphing method what is the point of intersection for this system
5x-y=4
4x+2y=6
thank you
Click here to see answer by richwmiller(17219)

Question 290399: how do you solve (2x-1)^2
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Question 290647: Don sells 250 T-Shirts ($2.00) and shorts ($4.00). In April total sales were $600.00. How many T-shirts and shorts did Don sell. Hint Let S= shorts
Click here to see answer by richwmiller(17219)

Question 290656: 5y+15(y+1)=35
Click here to see answer by College Student(505)

Question 290817: what is the ordered pair of 2y-10x=-46 and x-3y=13
Click here to see answer by checkley77(12844)

Question 290796: In a family there are two cars. In a given week, the first car gets an average of miles per gallon, and the second car gets miles per gallon. The two cars combined drive a total of miles in that week, for a total gas consumption of gallons. How many gallons were consumed by each of the two cars that week?

Click here to see answer by checkley77(12844)

Question 291011: What is the solution to the system of equations
y=10-3x
4x-6y=16
Click here to see answer by jim_thompson5910(35256)

Question 291008: y=10x+25 and y=5x+40
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Question 291056: 1/2x-y=5
x-y=12 we have to solve algebraically

Click here to see answer by richwmiller(17219)

Question 291546: How do I solve this system of equations?
y=2x+3
y=-2x+7
Click here to see answer by blwinbbbles(106)

Question 291542: True or False - If two distinct straight lines in the coordinate plane are not parallel, then they intersect in exactly the same point.
Click here to see answer by richwmiller(17219)

Question 291784: solve and check 2(x-4)+3(x+5)=2x-2
Click here to see answer by blwinbbbles(106)

Question 291903: I purchased a total of 8 music mp3 and movies from iTunes this month. The total purchase price of the movies and music mp3 is $34.92. If I each movie cost 9.99 and each music file cost $0.99, then how many music files and how many movies did I purchase? Please use either the addition (elimination) or substitution method to solve this problem.
Click here to see answer by richwmiller(17219)

Question 291958: The sum of two numbers is -19 and their difference is -5. Write a system of equations and solve it using a graph.
I have one equation as y=-19 + (x-5) and can't come up with the other one.
Click here to see answer by Alan3354(69443)

Question 291872: Kay spends 250 min/week exercising. Her ratio of time spent on aerobics to time spent on weight training is 3 to 2. How many minutes per week does she spend on aerobics? How many minutes per week does she spend on weight training?
Click here to see answer by rfer(16322)

Question 292113: how do you simplify linear equations like y=3/2x+2
Click here to see answer by Alan3354(69443)

Question 292330: how to solve -5(4x+8)=-260
Click here to see answer by oberobic(2304)

Question 201104: 2x+4=4
y=-2x+4
Click here to see answer by anahiperez(1)

Question 292776: Will the following system be satisfied by the point(-3, 5)?
1/3x +5 = 4
-1/5y - 3x = 10

Click here to see answer by Alan3354(69443)

Question 292776: Will the following system be satisfied by the point(-3, 5)?
1/3x +5 = 4
-1/5y - 3x = 10

Click here to see answer by richwmiller(17219)

Question 292954: what is y=-2x+4
Click here to see answer by jim_thompson5910(35256)

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