A supply company manufactures copy machines. The unit cost C(the cost in dollars to make each machine) depends on the number of machines made. If x machines are made, then the unit cost given by the function C(x) =x^2 -520x + 72,857. What is the minimum unit cost m

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.