Aand b are complementary angles find a and b a=3/4x-13 b=3x-17

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Astock has a 25% probability of increasing by $10 and a 75% probability of decreasing by $5. what is the stocks expected increase or decrease?

Huong is organizing paperback and hardback books for her club's used book sale. the number of paperbacks is 12 less than three times the number of hardbacks. huong had 162 paperbacks. how many hardback books were there?