<p>I have the Math B regents (in nys) in a week and would appreciate your help on the following questions:
20. If you have the red Barron's reviewbook, it is number 20 in June 2005. It's a diagram, and I don't understand it.
24. Express in simplest form: (1/x)+[1/(3+x)].
30. Find to the nearest degree, all values of x in the interval 0</= x </= 360 (0 is less than or equal to x is less than or equal to 360), that satisfy the equation 3Cos2x+Sinx-1=0.
Thanks!</p>