# Yahoo Web Search

1. ### Does sinx = sin(π - x ) and/or does (sinx)^2 = (sin(π- x ))^2?

...trigonometric identity, so you were probably expected to know it. sin(pi - x ) = sin(pi)*cos( x ) - cos(pi)*sin( x ) sin(pi - x ) = 0*cos( x ) - (-1)*sin( x ) sin(pi - x ...

2 Answers · Science & Mathematics · 20/10/2011

2. ### Can someone help me solve for X ?

2) (5-4 x )/7 = (3-11x)/12= 60 - 48x = 21 - 77x 29x = - 39 x = -39/29

5 Answers · Science & Mathematics · 30/03/2009

3. ### Minimizing Cost?

c) is easy; they're just asking for C(0). To do the rest, set C' = 0. Since C'' is uniformly = 10 (Helloooo! Upward-facing parabola!), that critical point will indeed be a minimum. C and C' at the...

1 Answers · Science & Mathematics · 20/05/2008

4. ### math problem i need help with please?

Olimpiada's speed— x : 1/2( x + x - 6) = 6 2x - 6 = 12 2x = 18 x = 9 John 's speed: = 9 - 6 = 3 Answer: Olimpiada's speed, 9 mph; John 's speed, 3 mph

1 Answers · Science & Mathematics · 04/01/2010

5. ### Algebra questions?!?! ten points to best answer!!!?

...end of a 6 mile track. John Doe , an average walker, is on the other...39;s average speed exceeds John 's by 6 mph, find the speed of both...wildebeast speed L = lion speed x = time Lx = .02 * W...

1 Answers · Science & Mathematics · 29/06/2012

6. ### help me with check for a algebra problem?

to check youmcan just take the speed times the time and see if it is the correct distance 9 * 1/2 + 3 * 1/2 = 6 so it checks

1 Answers · Science & Mathematics · 24/10/2012

7. ### Help with Statistics standard deviation? 5 stars?

... 70 with a spread (standard deviation) of 5 points. Now, if student John Doe scores 65 percent, what is his Z score or relative ...

1 Answers · Science & Mathematics · 18/11/2013

8. ### WORD PROBLEMS CAN ANYONE HELP ME PLEASE!!!?

...7 hours (12/7) 1/3 + 1/4 = 1/ x 4/12 + 3/12 = 1/ x 7/12 = 1/ x x = 12/7 7) ANSWER: 2 1/4 hours (9/4) If John can type 2/3 of a manuscript in 12 hours, then he takes 18 ...

7 Answers · Science & Mathematics · 29/05/2009

9. ### Need help with Alg 2 Problem: DRT?

Speed of canoe ( x ), speed of current (y), time canoeing from passing the log and back to the... and 2nd equations: y(t + 1) = 2 y = 2/(t + 1) - ( x - y) + t( x + y) = 2 - x + y + tx + ty = 2 y + ty = x + 2 - tx y(1 + t) = ( x + 2 - tx) y = ( x ...

1 Answers · Science & Mathematics · 22/10/2009

10. ### maths percentages URGENT *10 points*?

Terry paid for 70% of the original ticket price. So: x * .70 = £22.75 x = £22.75 / .70 = £32.50

7 Answers · Science & Mathematics · 09/10/2008