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)

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.