a 100 ml container holds a 6.4% dextrose solution. how many ml of water needs to. be added to the 100 ml to reduce the concentration to 2.7%

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?