A construction crew is lenghting a road. Let L be the total of the road (in miles). let D be the number of days the crew has worked. Suppose that L=2D+200 give L as a function of D. the crew cab work for at most 60 days.

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

What is the measure of angle tvu shown in the diagram below

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.