I need help on number 2

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27