Y is inversely proportional to x, and y=12 when x=4. find the value of x when y=8

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?