Harmonic mean if a number h such that (h-a)/(b-h)=a/b prove h is h(a, b) iff satisfies either relation a. (1//h) = (1/h) - (1/b) b. h = (2ab)/(a+b)

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

Explain how you can use the associative property to evaluate (7x50)x4.