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

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Question 468205: i need help to simplify the linear system
Click here to see answer by Alan3354(69443)

Question 468361: I am trying to figure out how to solve this problem using the substitution method. I know that it equals 1000, but I can't figure out how to show the proper work. Any help of guidance would be appreciated. Thank you.
60+.20(x-550)=120+.15(x-800)
Click here to see answer by ewatrrr(24785)

Question 468728: what are the X and y values(in whole numbers) of the equations y=-5/7x-11/7 and y=-1/3x+5/6
Click here to see answer by jorel1380(3719)

Question 468677: two types of candy sell for $2.50 per pound and $4.00 per pound. A store clerk is trying to make a 5 pound mixture worth 17.60. How much of each type of candy should be included in the mixture?
Click here to see answer by mananth(16946)

Question 468927: How do you do this problem?
Minimize: Z = 6x+15y
Subject to: 4x+5y>=27; 8x+4y>=32; x>=0;y>=0
It's wanting to know the minimum value of Z and what point it occurs at.
I can't figure out how to solve this. Thanks.
Click here to see answer by stanbon(75887)

Question 468975: How do I minimize: z=13x+9y
subject to: 3x+4y>=21; 8x+4y>=32; x>=0; y>=0 ?
Click here to see answer by ccs2011(207)

Question 469016: Solve the system by substitution:
-3x+6y=21
2x-4y=14
I have tryed completing this by making the -3x+6y=21 into an x=2y-7.
Then I got 2(2y-7)-4y=14 which turns into 4y-14-4y=14 and then -14=14.
If this problem is not possible, then what do I write as an answer??
Thank you so so so so so so much! (:
Click here to see answer by jim_thompson5910(35256)

Question 469164: solve the equation. Check the solution.
1-(x-3)=6+2x
Click here to see answer by MathLover1(20850)

Question 469501: two executive in cities 300 mi apart drive to a business meeting at a location between their cities. they met after 4 hours. find the speed of each car if one travels 20 miles per hour faster than the other
Click here to see answer by amoresroy(361)

Question 469646: I am having a hard time understanding how to write the slope-intercept form to 13x-11y=-12
Can someone help with breaking it down for me?
Thanks
Click here to see answer by Tatiana_Stebko(1539)

Question 469689: i need help solving 5x-2+3(x-11) =5 using distributive property
Click here to see answer by rfer(16322)

Question 469893: Marks: 2
Solve the system of equations by the best way you think is possible. Put the answer in an ordered pair.
2x - 6y = 6
2x + 3y = 24
Click here to see answer by sofiyac(983)

Question 469893: Marks: 2
Solve the system of equations by the best way you think is possible. Put the answer in an ordered pair.
2x - 6y = 6
2x + 3y = 24
Click here to see answer by ewatrrr(24785)

Question 469870: How do I check if this answer is really correct in elimination method.
1.) 3x - 2y = 6 SS={(4,3)}
5x + 7y = 41
2.) 5x - 2y = 8 SS={(2,1)}
3x - 5y = 1
Click here to see answer by Edwin McCravy(20056)

Question 470023: 6x+5y=7x+3y+1=2(x+6y-1)
Click here to see answer by sofiyac(983)

Question 470198: Solve this system using substitution: y=1/3x+10 x=3y+6
Click here to see answer by Tatiana_Stebko(1539)

Question 470387: In the following system of equations, what does y equal?
10x+9y=3
8x+y=6
Click here to see answer by sofiyac(983)

Question 470644: what is 6x+4y+5z-4x+2z-7y= ?
Click here to see answer by sofiyac(983)

Question 470908: Two minor league baseball players got a total of 298 hits. washington had 10 more hits than sanchez. Find the number of hits for each player
Click here to see answer by ewatrrr(24785)

Question 470920: write a system of linear equation whose solution gives the number of each type of room rented. when ten rooms are rented at the rates of $80 and $120 pernight. The total collected of the 10 rooms is $920.
Click here to see answer by ptaylor(2198)

Question 471019: Take out the GCF:
13x to the 2nd yz plus 169xy to the 2nd z to the 2nd minus 39xyz to the 3rd
Click here to see answer by algebrahouse.com(1659)

Question 471094: rental car costs $25 per day plus
$0.20 per mile. If someone has $200 to spend and
needs to drive the car 90 miles each day, for how
many days can that person rent the car?
Click here to see answer by josmiceli(19441)

Question 471345: using substution mehhod [x+2y=11]
[2x-y=2
Click here to see answer by algebrahouse.com(1659)

Question 471405: Solve by substitution method and what is the solution set?
15x-10y=5
15y=-6+15x

Click here to see answer by faceoff57(108)

Question 471402: Solve by elimination method and what is the solution set?
3x-7y=15
-5x+4y=-25

Click here to see answer by mananth(16946)

Question 471439: 2x+y=7
x-3y=5
Click here to see answer by mananth(16946)

Question 471497: solve if x=3
(1/3)y2=12=5x
Click here to see answer by Alan3354(69443)

Question 471616: A rental car agency charges $15 per day plus 11 cents per mile to rent a certain car. Another agency charges $21 per day plus 5 cents per mile to rent the same car. How many miles will have to be driven in one day for the cost of a car from the first agency to equal the cost of a car from the second agency in one day? (Express the problem as a system of linear equations and solve by any method).
Click here to see answer by jorel1380(3719)

Question 471617: Tasty Bakery sells three kinds of muffins: chocolate chip muffins at 30 cents each, oatmeal muffins at 35 cents each, and cranberry muffins at 40 cents each. Charles buys some of each kind and chooses twice as many cranberry muffins as chocolate chip muffins. If he spends $4.65 on 13 muffins, how many oatmeal muffins did he buy?
Click here to see answer by jorel1380(3719)

Question 471632: f(x)= x�+4
f(0) and f(2)

Click here to see answer by jorel1380(3719)

Question 471629: x+y+z=6
2x-y+z=8
x-2y-z=-19
I need help solving these systems of equations.
Click here to see answer by MathLover1(20850)

Question 471806: A boy rows his boat 8 km downstream in 1 hour and 4 minutes, and returns in 2 2/7 hour at what rate will he row in still water? what is the rate of the current ?
Click here to see answer by stanbon(75887)

Question 472332: can you solve a linear system by using substitution?
Click here to see answer by ewatrrr(24785)

Question 472573: An airplane travels 500 miles against the wind in 4 hours, and makes the return trip with the same wind in 2 hours. Find the rate of the wind.
Click here to see answer by jorel1380(3719)

Question 472575: During the 1998-1999 Junior hockey league season, the Sharks played 64 games. Together their wins ans losses totaled 57. they tied 15 fewer games than they lost. how many games did they tie that season?
Click here to see answer by jorel1380(3719)

Question 472578: The number of enrollees in health organizations in Illinois in a recent year was 2,429,275. this was a 41.2% increase over the previous year. What was the former number of enrollees?
Click here to see answer by jorel1380(3719)

Question 472581: A company makes 3 types of cables. Cable A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 red. They used 100 black, 110 white, and 90 red wires. How many of each cable were made?
Click here to see answer by ankor@dixie-net.com(22740)

Question 473147: im lost please help me with this system:
4a+7b=-39
8a-4c=-24
6b-4c=-46
Click here to see answer by stanbon(75887)

Question 473147: im lost please help me with this system:
4a+7b=-39
8a-4c=-24
6b-4c=-46
Click here to see answer by ewatrrr(24785)

Question 473147: im lost please help me with this system:
4a+7b=-39
8a-4c=-24
6b-4c=-46
Click here to see answer by karaoz(32)

Question 473168: There are 357 calories in two slices of bread and three eggs. There are 217 calories in one slice of bread and two eggs. How many calories are in a slice of bread and how many are in an egg
Click here to see answer by karaoz(32)

Question 473184: Please help me solve this equation
what is the linear system?
x-2y=8
x+y=2
Click here to see answer by ewatrrr(24785)

Question 473189: please help me solve this equation.
solve the linear system.
y=-4x+4
y=-x-5
Click here to see answer by ewatrrr(24785)

Question 473189: please help me solve this equation.
solve the linear system.
y=-4x+4
y=-x-5
Click here to see answer by MathLover1(20850)

Question 473188: Please help me solve this equation.
solve the linear system.
5x+5y=-1
y=-x
Click here to see answer by MathLover1(20850)

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