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In a rectangle klmn, km = 6x + 16 and ln = 49. find the value of x

The result of which expression will best estimate the actual product of (-4/5) x (3/5) x (-6/7) x (5/6) (i need an expression not an answer)

Azookeeper predicted the weight of a new baby elephant to be 233 pounds when it was born. the elephant actually weighed 265 pounds at birth. what was the percent error of the zookeeper's prediction? asap