Which expression is equivalent to (-4y-x)-(y-9x) ?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?