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by theshadow
Thu Mar 12, 2015 7:33 pm
Forum: Geometry
Topic: Point Slope form without slope
Replies: 2
Views: 103

Re: Point Slope form without slope

Have learned about point slope form. It is one of the form to find the equation of the straight line with formula y-y1=m(x-x1). But how to find the equation without slope using point slope form? What do you mean by "finding the equation without slope"? Because the line equation kind of ha...
by theshadow
Thu Mar 12, 2015 7:31 pm
Forum: Intermediate Algebra
Topic: Counting using Permutations and Combinations
Replies: 1
Views: 135

Re: Counting using Permutations and Combinations

1. Using the letters from the word equation , how many 5-letter patterns can be formed in which q is followed immediately by u? The q and u are together as one unit, so you have the "letters" a, e, i, n, o, qu, and t, with no repetitions. This is 7 units and you have to pick 5. So do 7-ch...
by theshadow
Mon Mar 09, 2015 2:56 pm
Forum: Intermediate Algebra
Topic: Linear programming problem
Replies: 1
Views: 109

Re: Linear programming problem

Hi, I am going to use excel to try to solve this problem and I can't figure out how to do this: Do you have to do it in Excel? Are you not allowed to do it the regular algebra way? Company builds 2 models of computers (A and B) There are 800 hours of labor available Labor required for each A comput...
by theshadow
Tue Jan 27, 2015 10:43 pm
Forum: Trigonometry
Topic: Angle of an Isosceles triangle for any opposite side length.
Replies: 2
Views: 268

Re: Angle of an Isosceles triangle for any opposite side len

ABC is a triangle. Opposite the vertices A, B, and C are the sides a, b, and c, respectively. (thanks for the syntax help). This is an Isosceles triangle since a and b are the same length. What formula can I use to determine the angle C for a given c. I am trying to write a function that will retur...
by theshadow
Fri Jan 16, 2015 3:34 am
Forum: Intermediate Algebra
Topic: reverse formula
Replies: 4
Views: 542

Re: reverse formula

Dear Forum members , Can someone help me to turn this formula so I can calculate ta . thank you in advance, Mon. P = P50 [ (ti - tr) / ln( (ti - ta) / (tr - ta) ) 1 / 49.32 ]n (1) ta = ........ I don't know what you mean by "turning" the "formula" to calculate "ta". Ma...
by theshadow
Thu Jan 15, 2015 1:18 pm
Forum: Intermediate Algebra
Topic: Help to create an Algebraic equation
Replies: 3
Views: 437

Re: Help to create an Algebraic equation

A couple living together have a combined bill payment of $1600. Jane makes a wage of $2900 a month and John makes a wage of $2000 a month. To make it fair John should pay a bit less percentage of his wage (being the lesser income maker) towards the bill so they have an equal amount percentage of in...
by theshadow
Sun Jan 11, 2015 4:30 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Difficult question
Replies: 7
Views: 689

Re: Difficult question

the question is how long does it take to get to 180 feet. I tried to come up with an answer using the equation you provided but am having a trouble breaking it down. I came up with h(t) = 16t^2-144t+180 and I cant get it simplified enough to solve for t. There's nothing to solve the way you're doin...
by theshadow
Sun Jan 11, 2015 4:27 am
Forum: Trigonometry
Topic: trig identities...again
Replies: 1
Views: 300

Re: trig identities...again

I'm stuck on one of the last questions in my textbook and would appreciate any help... Use the sum or product identities to simplify the following [sin(@)+2sin(2@)+sin(3@)] / [cos(@)+2cos(2@)+3cos(3@)] I was going to ask if theres supposed to be a 3 in front of the sin(3@) but Wolfram Alpha can't s...
by theshadow
Tue Dec 16, 2014 2:41 pm
Forum: Geometry
Topic: Find the area of polygon
Replies: 3
Views: 665

Re: Find the area of polygon

I have read in easycalculation site that using pick's theorem, area of the polygon can be calculated by joining the lattice points...Need more explanation on this. The formula looks pretty easy: count the points "i" inside, count the points "b" on the edge ("boundary")...
by theshadow
Tue Nov 18, 2014 12:13 pm
Forum: Intermediate Algebra
Topic: Relationship between a square and a parabola?
Replies: 3
Views: 833

Re: Relationship between a square and a parabola?

In other words, the "square" in "completing the square" has nothing to do with the four-cornered geometrical shape. It has to do with moving something around until you get it to be something that is the square (to the power 2) of something else. The shape of the graph is always g...

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