Tutors Answer Your Questions about Linear-systems (FREE)
Question 190977: Hi, was wondering if anyone could help me with the following system of equations problem. Steps on how to solve fully would be ideal also.
A-B+C=1
2A-2B=0
3A+B-3C=2
Any help would be most appreciated,
-Thanks, -Nick.
Click here to see answer by stanbon(75887)  |
Question 191384: the question (i have to do 11 of these) is:
"Determine whether each system is consistent or inconsistent by solving it graphically and algebraically"
{ y=-4x+6
{ 2y=-8x-8
i tried doing "step 1: 2(-4x+6)=-8x-8 step 2: -8x+12=-8x-8 step 3: 0x+12=-8"
and i know it isn't right, could someone explain how you find the answer please.
thanks!!
Click here to see answer by jim_thompson5910(35256) |
Question 191406: Back again with some homework!
I'm stuck on two problems in one section, ive been able to do the questions up until this question particularly:
{ 2x-3/4y=17
{ -3x-5/8y=-11
i tried using elimination to find the answer but nothing i get seems right. if someone could explain HOW to solve it it would be a major major help!
Click here to see answer by stanbon(75887) |
Question 191410: Back again with some homework!
I'm stuck on two problems in one section, ive been able to do the questions up until this question particularly:
find each system as consistent dependent or consistent independent, or inconsistent
{ 2x-3/4y=17
{ -3x-5/8y=-11
i tried using elimination to find the answer but nothing i get seems right. if someone could explain HOW to solve it it would be a major major help!
Click here to see answer by jim_thompson5910(35256) |
Question 191530: Hello, can someone help me? I have a homework problem I just cannot figure out. My assignment asks me in a 2 variable problem, how do you determine what the first equation should be, and what determines what the second equation is. How are they similar and how are they different? I'd be very greatful for any help, I've been trying to write this all day and getting no where.The homework question does not include any actual problems. Than-x ahead of time to anyone that can help, I appreciate it. Orelan
Click here to see answer by solver91311(24713)  |
Question 191607: Help!Linear systems wasn't bad enough now it's linear word problems. I'm totally lost. I would appreciate any help you can be. Thank-you ahead of time you generous soul. Orelan Paint Town sold 45 paintbrushes, one
kind at $8.50 each and another at $9.75 each. In all,
$398.75 was taken in for the brushes. How many of
each kind were sold?
Click here to see answer by stanbon(75887) |
Question 191610: Please help this problem is making crazy! I picked this problem because I thought it wouldn't be so hard, but I'm having a hard time anyway. Could you give me a hand. I really really thank-you. If the perimeter of a rectangle is 93in than what is the L & W?
Click here to see answer by stanbon(75887) |
Question 191714: Hi there, I need some help again. Can someone help me solve this? I don't even understand the problem. Thanks! The perimeter of a rectangle is 108m. The length is 9m more then twice the width find the dimensions. What is the length.
Click here to see answer by nerdybill(7384)  |
Question 191730: Hi there, I just can't get this type of problem so I need some help. If anyone would like to solve this, I would be very greatful.
The perimeter of a rectangle is 132 inches. The length exceeds the width by 58 inches. Find the length and width in inches.
Click here to see answer by Mathtut(3670) |
Question 191743: Can someone help me please? I'm having a real hard time with this.
A student makes a $9.50 purchase at the bookstore with a 20 dollar bill. The store has no bills and gives the change in quarters and 50-cent pieces. There are 30 coins in all.How many of each kind are there? Thanks alot.
Click here to see answer by stanbon(75887) |
Question 191711: Good afternoon, I have a problem I really need some help with. The directions say "Solve the systems of equations by graphing. Then classify the system." The problem has 4 graphs to choose from(they won't let me copy so I can't paste,lol). I think if you could give me the coordinates I could figure out which graph they go to. Than-x in advance,you've saved a lot of grey hairs:-) The equations are:
7u+v=47
7u=v+57
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 191752: Is there some way someone can help me with this? I get lost after the first sentence.
A disk jockey must play 14 commercial spots during one hour of a radio show. Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 minutes, how many 60 second commercials were played that hour. I thank you.very much, kate
Click here to see answer by RAY100(1637) |
Question 191759: Can someone help? I just can't figure out these "linear word problems".Thank-you
Soybean meal is 14% protein, cornmeal is 7% protein. How many pounds of each should be mixed together in order to get a 280 lb. mixture that is 10% protein?
Any help I appreciate.
Click here to see answer by RAY100(1637) |
Question 191760: the problem is:
3a-4b=1
12a-b= -11
this is as far as i have gotten...
3a-4b=1
4(12a-b= -11)
________________
3a-4b=1
_ 48a-4b= -44
____________
45a= -43
then i don't know.. i have to solve for a and b
thank you so much for helping me!!!!
Click here to see answer by RAY100(1637) |
Question 191762: Hi, I'm kate and I need some help with linear systems.
Snookers Lumber can convert logs into either lumber or plywood. In a given day the mill turns out twice as many units of plywood as lumber. The mill makes a profit of $30 a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $12480. Thank-you for your help.
Click here to see answer by RAY100(1637) |
Question 191762: Hi, I'm kate and I need some help with linear systems.
Snookers Lumber can convert logs into either lumber or plywood. In a given day the mill turns out twice as many units of plywood as lumber. The mill makes a profit of $30 a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $12480. Thank-you for your help.
Click here to see answer by jim_thompson5910(35256) |
Question 191761: can you please help me solve this equation...
10r-9s=18
6s+2r=1
its either a substitution problem or you add or subtract..
i have tried and tried to get this answer but i can't seem to get it..
thank you so much for helping!
Click here to see answer by RAY100(1637) |
Question 191794: I can't figure this out. Can anyone help? Hockey teams recieve 2 points when they win and 1 point when they tie. One season a team won a championship with 58 points. They won 11 more games than they tied. How many wins and how many ties did the team have? Thank-you for helping.
Click here to see answer by Mathtut(3670) |
Question 191853: Jason liked to rent cars from Airport Rent-a-car. The first time he rented a car, he drove 125 miles over 2 days. On his second trip, Jaosn drove 350 miles over 4 days. The cost of the first thrip was $95.75. The cost of the second trop was $226.50. What is the cost per day and cost per mile of renting a car from Airport Rent-a-car?
Click here to see answer by RAY100(1637) |
Question 191949: Is there anyone out there that could help me solve a problem? I'm not sure what they even want. Thank-you very much.
w+r=30
18.95w + 19.50r = 572.90
Find the values for w and r.
Bittenger, M.L. & Beecher, J.A. (2007). Introductory and intermediate algebra (3rd ed.).
Boston: Pearson-Addison Wesley
Click here to see answer by jim_thompson5910(35256) |
Question 191914: Hi . im stuck on this maths question.
equation:
x + (x+1) + (x+2) = y
use the equation to help you write the missing expressions in terms of y.
(x+5) + (x+6) + (x+7) =
2x + 2(x+1) + 2(x+2) =
(x+a) + (x+1+a) + (x+2+a) =
how would you work it out? please explain it step by step
Click here to see answer by ankor@dixie-net.com(22740) |
Question 192154: How to write the equation for the following: 3000 books in three piles. Pile 1 has 10 more books than pile 2. Pile 2 has twice as many as pile 3. How many in each pile? This is my fourth graders homework and I can't remember how to make the into an equation to be solved. Thanks so much for your help!!
Click here to see answer by jim_thompson5910(35256) |
Question 192182: Please help me solve...
A women has $7000,part is invested for one year paying 7% interest and the remaining amount in a fund paying 9%. After a year total interest on the 2 investments is $540. How much is invested at each rate?
Click here to see answer by Mathtut(3670) |
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