Mr. webb gave his waiter a $8.60 tip on a $50 bill. what percent did he give the waiter?

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Simplify the expression 10/11(22z) + (a+5) -1