Find sin (s - t) given that cos s = 1/3
with s in quadrant I, and sint
1/4
with t in quadrant II.

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?