Can you help me understand this?
- Thread starter WTF?
- Start date
They're ALL wrong except the 1st one.
You seem to be unaware of the basics; take #2:
10v + 5w - (-w - 3) : you have 10v + 5w - 3 ; how?!
10v + 5w + w + 3 :-(-w) = +w and -(-3) = +3
10v + 6w + 3 : that's the answer
You're making silly errors in all the others;
frankly, you don't seem to know what you're doing;
is your teacher not TEACHING?
You seem to be unaware of the basics; take #2:
10v + 5w - (-w - 3) : you have 10v + 5w - 3 ; how?!
10v + 5w + w + 3 :-(-w) = +w and -(-3) = +3
10v + 6w + 3 : that's the answer
You're making silly errors in all the others;
frankly, you don't seem to know what you're doing;
is your teacher not TEACHING?
- Joined
- Feb 4, 2004
- Messages
- 16,583
The following should serve to get you started:
. . . . .FreeMathHelp lesson: Multiplying Polynomials
. . . . .FreeMathHelp lesson: Order of Operations
. . . . .FreeMathHelp lesson: Using "FOIL"
. . . . .FreeMathHelp lesson: Combining Like Terms
Eliz.
. . . . .FreeMathHelp lesson: Multiplying Polynomials
. . . . .FreeMathHelp lesson: Order of Operations
. . . . .FreeMathHelp lesson: Using "FOIL"
. . . . .FreeMathHelp lesson: Combining Like Terms
Eliz.
Well, I'm still confused on #'s 3-6....
I don't understand how simplify -m/7 - 1/7....would that be -m/1 ?
Also because m-9m is in parentheses, does that mean I multiply -m/1 by it? or do I remove the parentheses and carry on...any help is greatly appreciated.
I don't understand how simplify -m/7 - 1/7....would that be -m/1 ?
Also because m-9m is in parentheses, does that mean I multiply -m/1 by it? or do I remove the parentheses and carry on...any help is greatly appreciated.
What about the "justifying" part? Is this incorrect also?
EDIT:
#3 I got -9m
#4 I got 45t
#5 I got 4p^2 -27p -40
#6, So far I have 60h/15 - 120/5 , since the denominator is the same, they cancel out right? So how do I do 60h - 120? thnx guys, your help is appreciated.
EDIT:
#3 I got -9m
#4 I got 45t
#5 I got 4p^2 -27p -40
#6, So far I have 60h/15 - 120/5 , since the denominator is the same, they cancel out right? So how do I do 60h - 120? thnx guys, your help is appreciated.
- Joined
- Feb 4, 2004
- Messages
- 16,583
Inverting (followed by multiplying) is what you do when you're dividing by a fraction. You're subtracting fractions. To add and subtract fractions (of like denominators), add and subtract their numerators.
By the way, if you are referring to question (3), "Simplify -M/7 - (1/7)(M - 9M)", the order of operations requires that you do the simplification inside the parentheses first, followed by the multiplication by the 1/7, only then moving on to combining with the -M/7.
3) "-9m" is not the correct simplification of the posted expression.
4) How did you get "45t"? What happened to your denominators? (It would really help if you started showing your work.)
5) Yes.
6) How do you get that "15" and "5" are the same number? How do you get that denominators "cancel out" when fractions are added? (Do you really believe that 1/2 + 1/2 equals 1 + 1 = 2, rather than 2/2 = 1?) Why are you not reducing fractions when possible? (Doesn't 15 go evenly into 60? Doesn't 5 go evenly into 120?) And where did "120/5" come from?
Eliz.
By the way, if you are referring to question (3), "Simplify -M/7 - (1/7)(M - 9M)", the order of operations requires that you do the simplification inside the parentheses first, followed by the multiplication by the 1/7, only then moving on to combining with the -M/7.
3) "-9m" is not the correct simplification of the posted expression.
4) How did you get "45t"? What happened to your denominators? (It would really help if you started showing your work.)
5) Yes.
6) How do you get that "15" and "5" are the same number? How do you get that denominators "cancel out" when fractions are added? (Do you really believe that 1/2 + 1/2 equals 1 + 1 = 2, rather than 2/2 = 1?) Why are you not reducing fractions when possible? (Doesn't 15 go evenly into 60? Doesn't 5 go evenly into 120?) And where did "120/5" come from?
Eliz.
Oh sorry, I meant 120/15....
#6, So it's 4h - 8?
#3, m - 9m, is 10m? so -1/7*10m is -1/7*10m/1? That would lave me with -10m / 7, wouldn't it? Would then I need to combine like terms, the -m/7 + -10m/7 ? I think that leaves me with -11m....
#4 Is it 9t? I really can't explain how I got it....tho.
#8 I got 11rt + 88r - 6t -48
thanks for your input.
#6, So it's 4h - 8?
#3, m - 9m, is 10m? so -1/7*10m is -1/7*10m/1? That would lave me with -10m / 7, wouldn't it? Would then I need to combine like terms, the -m/7 + -10m/7 ? I think that leaves me with -11m....
#4 Is it 9t? I really can't explain how I got it....tho.
#8 I got 11rt + 88r - 6t -48
thanks for your input.