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by odysseus
Thu Dec 02, 2010 1:03 pm
Forum: Pre-Algebra
Topic: linear equation: solve 4(1 - p) = 3(p - 2), and check answer
Replies: 1
Views: 2546

Re: linear equation: solve 4(1 - p) = 3(p - 2), and check an

Solve. and check by answer
4(1-p)= 3(p-2) :clap:
First do the parentheses; the left side would be 4(1) + 4(-p) = 4 - 4p. Then solve like they show here: add 4p to both sides, add 6 to both sides, and then divide thru.
by odysseus
Tue Sep 14, 2010 11:15 am
Forum: Advanced Algebra ("pre-calculus")
Topic: given u=-28.593*ln(k)+144.76, empirically define c, j
Replies: 1
Views: 1866

Re: given u=-28.593*ln(k)+144.76, empirically define c, j

u = -28.593*ln(k) + 144.76 The object is to empirically define "c" and "j" in the following equation by back substitution: u = c*ln(j/k) ; only valid where k approaches j You can use log rules to take the multiplier out front of the logarithmic term inside as an exponent. Then you can convert 144.7...
by odysseus
Mon Jun 07, 2010 12:18 am
Forum: Pre-Algebra
Topic: proportional or non proportional? 2Gb holds 250, 40Gb holds
Replies: 1
Views: 1835

Re: proportional or non proportional? 2Gb holds 250, 40Gb ho

What did you get when you did the cross-multiplication and compared the results? :?:
by odysseus
Sat May 01, 2010 8:34 pm
Forum: Intermediate Algebra
Topic: absolute value quadratic inequalities
Replies: 1
Views: 3188

Re: absolute value quadratic inequalities

Do the graph of the quadratic. Anywhere it's below the axis is negative, so re-draw that part upside-down so it's above the axis. Solve x^2-1=0 to find where the original graph crosses the axis and where the new graph touches. Where x^2-1 was positive anyway, solve x^2-1<2. Where x^2-1 was negative ...
by odysseus
Mon Apr 12, 2010 10:48 pm
Forum: Intermediate Algebra
Topic: How do I determine the coordinates of the vertex ?
Replies: 1
Views: 1180

Re: How do I determine the coordinates of the vertex ?

With the equation 4(x-2)(x+6) , how would I determine the coordinates of the vertex ? One way is to multiply out the two factors (not the 4) and then use the formula they give here . A "cheat" way is to remember that the vertex is midway between the two x-intercepts. So use the two factors to find ...
by odysseus
Tue Feb 23, 2010 12:41 pm
Forum: Intermediate Algebra
Topic: Help Adding Rational Expressions
Replies: 3
Views: 1809

Re: Help Adding Rational Expressions

-2 + 4y + 6 ------- ------- ----- LCD = (y+3) (y-3) (y-3) y^2 - 9 (y-3)^2 3-y -2 + 4y + 6 ---------- ---------- ------- (y+3)(y-3) (y-3)(y-3) -1(3-y) The denominator 3 - y is not equal to -1(3 - y); it is equal to -y + 3 = -y - (-3) = -(y - 3). Then you can put the negative on the 6.
by odysseus
Fri Sep 18, 2009 1:40 pm
Forum: Discrete Math
Topic: are any sequences both arithmetic and geometric?
Replies: 1
Views: 5943

are any sequences both arithmetic and geometric?

Are there any sequences which are both arithmetic and geometric? I don't think so, but how would I prove this?
by odysseus
Tue Sep 08, 2009 4:52 pm
Forum: Uncategorized
Topic: How many metres would the pony cover when taking 24 steps?
Replies: 1
Views: 2069

How many metres would the pony cover when taking 24 steps?

A horse takes three steps to walk the same distance for which a pony takes four steps. Suppose that one step of the horse covers a half-metre. How many metres would the pony cover when taking twenty-four steps? I keep tying myself in knots, getting nowhere. Any ideas for an intelligent start on this...
by odysseus
Mon Jul 27, 2009 6:32 pm
Forum: Matrix (Linear) Algebra
Topic: vet designs special diet for cat.... Find least-cost mix
Replies: 2
Views: 4494

Yes, that made plenty of sense. Thank you for your time.
by odysseus
Sat Jul 25, 2009 3:13 pm
Forum: Matrix (Linear) Algebra
Topic: vet designs special diet for cat.... Find least-cost mix
Replies: 2
Views: 4494

vet designs special diet for cat.... Find least-cost mix

Would someone please outline the steps for this question, but without actually answering it? A vet designs a special diet for a cat. This diet requires that the cat be allowed no more than 1500 calories, but at least 400 g protein. The vet can special-order the animal's food, but would prefer instea...

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