Tutors Answer Your Questions about Linear-systems (FREE)
Question 12338: Hi Tutors: ( Rapalger, Abbie, Longjonsilver, whomever has the time)
I asked for help last night with this problem and it seemed like nobody was available to help me. So I am trying again. The topic is SYSTEMS OF EQUATIONS IN TWO VARIABLES. Please show me how to solve this equation graphically, classify the system as consistent or inconsistent and classify the equation as dependent or independent? Thanks in advance. f(x)=x+1, g(x)= 2/3x I think I am allowing the fraction to throw me off!
Click here to see answer by longjonsilver(2297)   |
Question 12503: the question says solve the following system of euqations by elimination.
x+2z =5
-4x+6y =0
x-2z=9
this is the order that the problem is set up, and i haven't seen anything like this, so i need a little help on what to do.
thanks matt
Click here to see answer by Earlsdon(6287) |
Question 12587: I was going along just fine doing Systems of Linear Equations and inequalities by the addition method. All of a sudden I had fractions and I am so confused, I have come up with the answers for a few of them, I don't know how, I just kept trying different things to multiply them by, but there has got to be something I am doing wrong. It is taking me 4 hours to do 20 problems and a whole sheet of paper just to answer 3 problems. Here is one I got to and completely went, HUH!!
2x/5 - y/2=13/2
3x/4 - y/5=17/2
Now, If i remember right, my instructor said that you wanted to find a number to multiply these all by, and to find a number that all 3 denominators would go into. So I used 10 for the 1st one. This is how I did it.
(10)2x/5 - (10)y/2=(10)13/2, and my answer for that one is
4x+5y=65, I don't know if this is right, or if it is, what to do next. Please Help!!!!!!!!!! Thank you!
Click here to see answer by Earlsdon(6287) |
Question 12667: my name is alexis and I am having troubles with my homework on problem solving such as 16- J= 12, what is the value of J? Our teacher taught us to make a positive 16 which crosses out the other 16 but = 28 when added to 12. Of course 4 is the answer, but how do I get to this answer on this specific problem. an example of what i'm doing is; s-38=57
38 38
------
0-95
s=95
Click here to see answer by elima(1433) |
Question 12840: I am an older student in Algebra and it is sooooooo confusing. I am having trouble with order of operations. Can you help me with this problem?:
7(3x-2)+5=6(2x-1)+24
this is what I have tried:
21x-14+5=12x-6+24
21x-9=12x+18
9x=-9+18
9x=9
x=1
But it's not right when I check it-but I may be doing that wrong also. Thank you for any help!
Click here to see answer by elima(1433) |
Question 12852: Hi Tutors:
I used the substitution method to solve this system of equation:
m-2n=16
4m+n=1
After going through all the steps my answer is n=-7 and m=30
My problem is I did not get the correct answers when I did a check. Please help me.
SAN ANTONIO is not "hot and dusty, it is hot and humid"
Click here to see answer by longjonsilver(2297) |
Question 12967: Would someone please help me understand this?:
-2(z-4)-(3z-2)=-2-(6z-2)
-2z+8-3z+2=12z+4 (this is where I get confused-do I add -2z and -3z?)
-5z+10=12z+4?
+5z +5z
10=7z+4
-4 -4
6=7z?
divide both by 6?
Any help is appreciated-thank you
Click here to see answer by Earlsdon(6287) |
Question 12985: Hello:
I really need your help. I have tried all possible ways to solve this equation but I am confused on how to start to solve it. Here is the question:
Find the point of intersection of the given straight lines.
x - 4y = -2
x + 2y = 4
Please help me with this problem. Thank you.
Click here to see answer by rapaljer(4667)  |
Question 12985: Hello:
I really need your help. I have tried all possible ways to solve this equation but I am confused on how to start to solve it. Here is the question:
Find the point of intersection of the given straight lines.
x - 4y = -2
x + 2y = 4
Please help me with this problem. Thank you.
Click here to see answer by sabanasir(22) |
Question 13011: Help! Now that horrid instructor (just kidding) is using letters like they were numbers:
Ax+By=C, solve for y
So I tried this:
I gotta isolate y
Ax+By is multiplication so I have to divide?
Ax+B divided by y?=C divided by y
Nope-wait it's Ax+By-y=C-y
then divide both sids by Ax? I'm going crazy-can someone help? Thank you and sorry for the trouble
Click here to see answer by Earlsdon(6287) |
Question 12989: Hello Again:
Thanks for your help. I appreciate it. Here is another equation that I need help on. I am trying hard to get to the root of the answer. Please help me.
Solve the systems of linear equation:
5x - 2y = 1
2x = y + -4
Please show me how to do this. I keep getting stuck. I tried the substitution method. Thank you again.
Click here to see answer by pwac(253) |
Question 13006: I am an older student in math 27 (if that means anything) and I am failing the class. I have a lot of trouble with orders of operations and especially linear stuff (that was intelligent) I mean I don't know how to do something like this:
4(x+2)+1=7x-3(x-2) let me try;
4x+2+1=7x-3x-2 or is it +2? Wait, it's times the 3 right?
so it's 4x+3=7x-3x+6? now this is where I get stuck-the 4x and the 7x-what is telling me what to do with them?
Let me try again:
4(x+2)+1=7x-3(x-2) dist prop next-
4x+8+1 (can we say 9 here)=7x-3x+6 because the -3 is dist into the ()?
4x+9=4x+6? Not that I need yet another view because everyone has different approaches, but i don't know what else to do. There has got to be a way to understand this. It's so confusing-especially negative numbers-like -5 is less than -4? (I think) The larger the neg number, the smaller throws me. Anyone willing to make suggestions would be very appreciated. thank you (I feel really stupid-all the kids in the class get it real quick!)
Click here to see answer by Earlsdon(6287) |
Question 13006: I am an older student in math 27 (if that means anything) and I am failing the class. I have a lot of trouble with orders of operations and especially linear stuff (that was intelligent) I mean I don't know how to do something like this:
4(x+2)+1=7x-3(x-2) let me try;
4x+2+1=7x-3x-2 or is it +2? Wait, it's times the 3 right?
so it's 4x+3=7x-3x+6? now this is where I get stuck-the 4x and the 7x-what is telling me what to do with them?
Let me try again:
4(x+2)+1=7x-3(x-2) dist prop next-
4x+8+1 (can we say 9 here)=7x-3x+6 because the -3 is dist into the ()?
4x+9=4x+6? Not that I need yet another view because everyone has different approaches, but i don't know what else to do. There has got to be a way to understand this. It's so confusing-especially negative numbers-like -5 is less than -4? (I think) The larger the neg number, the smaller throws me. Anyone willing to make suggestions would be very appreciated. thank you (I feel really stupid-all the kids in the class get it real quick!)
Click here to see answer by tayjay(2) |
Question 13006: I am an older student in math 27 (if that means anything) and I am failing the class. I have a lot of trouble with orders of operations and especially linear stuff (that was intelligent) I mean I don't know how to do something like this:
4(x+2)+1=7x-3(x-2) let me try;
4x+2+1=7x-3x-2 or is it +2? Wait, it's times the 3 right?
so it's 4x+3=7x-3x+6? now this is where I get stuck-the 4x and the 7x-what is telling me what to do with them?
Let me try again:
4(x+2)+1=7x-3(x-2) dist prop next-
4x+8+1 (can we say 9 here)=7x-3x+6 because the -3 is dist into the ()?
4x+9=4x+6? Not that I need yet another view because everyone has different approaches, but i don't know what else to do. There has got to be a way to understand this. It's so confusing-especially negative numbers-like -5 is less than -4? (I think) The larger the neg number, the smaller throws me. Anyone willing to make suggestions would be very appreciated. thank you (I feel really stupid-all the kids in the class get it real quick!)
Click here to see answer by pwac(253) |
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