Search 79,802 tutors
FIND TUTORS
Ask a question

Answers by Thomas E.

The position of the falling particle is:   x = 0 y = 100-9.8t2   The position of the projected particle is:   x = (60cos(60))t = 30t y = (50sin(60))t -9.8t2= 30sqrt(3)t-9.8t2   Think of the distance between the 2 particles as an ever changing...

You must have 3 pennies so the other 5 coins add up to $0.65.  The only way it works is with 2 quarters and 3 nickles.

Let x = # gallons of 25%, then 100-x = # gallons of 75%   .25x + .75(100-x) = .6(100)   .25x + 75 -.75x = 60   -.5x = -15   x = 30 gallons of 25%   70 gallons of .75%

I think you want to factor the top as the difference of 2 squares and get:   (sin2 x -cos2 x)(sin2 x + cos2 x)/(sin2 x - cos2 x)  part cancels out    sin2 x + cos2 x = 1