Prove: tan(x-y)+tan(y-z)+tan(z-x)=tan(x-y) tan(y-z)tan(z-x) i need very good explanations because i can't do or understand this

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

If a is a nonzero real number then the reciprocal of a is