## Search found 8 matches

Mon Sep 13, 2010 8:27 am
Forum: Trigonometry
Topic: proving (sin A + cos A) (tan A + cot A) = sec A + csc A
Replies: 1
Views: 2181

### proving (sin A + cos A) (tan A + cot A) = sec A + csc A

(sin A + cos A) (tan A + cot A) = sec A + csc A

any help would be great!
Fri Jul 30, 2010 1:05 pm
Forum: Beginning Algebra
Topic: Car A (10 kph) leads Car B (20 kph) by 50 km
Replies: 1
Views: 1017

### Car A (10 kph) leads Car B (20 kph) by 50 km

this word problem looks really easy, but for some reason I CAN'T SOLVE IT (although I do know the right answer since it came from a college entrance test review book): Car A leads Car B by 50 km with velocities 10 kph and 20 kph respectively. If they are headed in the same direction, after how many ...
Sat Jul 17, 2010 1:43 pm
Forum: Intermediate Algebra
Topic: investment word problem
Replies: 1
Views: 1217

### investment word problem

i'm stuck. "Rose made two investments totaling \$25,000. On one investment she made 12% profit, but on the other she took an 18% loss. If her net loss was \$1200, how much was the investment that gained a 12% profit?" (the answer should be \$11,000 ) Her net loss was \$1200 - does that mean her total mo...
Sat Jun 12, 2010 8:21 am
Forum: Discrete Math
Topic: combination with specifications
Replies: 4
Views: 3269

### Re: combination with specifications

On what basis are you finding the number of ways that they could be picked in order? Isn't this a combination, so the order doesn't matter? :confused: oh. right. I forgot about that. *embarrased* well anyway, would it be okay to ask for a detailed explanation as to how to solve these kinds of combi...
Sat Jun 12, 2010 1:01 am
Forum: Discrete Math
Topic: combination with specifications
Replies: 4
Views: 3269

### Re: combination with specifications

In how many ways can a comittee of five be chosen out of 15 people, 7 of which are males and 8 of which are females, if one male and one female are to be included in each selection? In how many ways can you choose the one required male? In how many ways can you choose the one required female? In ho...
Fri Jun 11, 2010 12:53 pm
Forum: Intermediate Algebra
Topic: dividing complex fractions by complex fractions
Replies: 2
Views: 1390

### Re: dividing complex fractions by complex fractions

thanks!
Fri Jun 11, 2010 12:51 pm
Forum: Discrete Math
Topic: combination with specifications
Replies: 4
Views: 3269

### combination with specifications

Hello, everyone. I was hoping you guys could help me out. I'm about to take this huge college entrance exam in two months and I bought this reviewer at a bookstore - the problem, however, is that the reviewer I bought only posts the ANSWERS to the questions without explanations. How do you solve com...
Tue May 11, 2010 8:15 am
Forum: Intermediate Algebra
Topic: dividing complex fractions by complex fractions
Replies: 2
Views: 1390

### dividing complex fractions by complex fractions

today we were given this equation in our college entrance exam review class: http://i29.photobucket.com/albums/c256/chikage3/uh/wah.png I was too busy trying to solve it on my own that I didn't get to listen to the explanation, but i saw on the board that the answer is: http://i29.photobucket.com/al...