When testing for current in a cable with eleven color-coded wires, the author used required for every possible pairing of two wires?
meter to test two wires at a time.
The number of tests required is

Can someone check my answer? you

Which rational number could be graphed between -4 and -5

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?