Arturo is designing a bridge for science class using parallel supports for the top and bottom beam. Find m∠2 if m∠1 = 60°.

Officer brimberry wrote 24 tickets for traffic violations last week, but only 9 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.

Which one ? is the answer and how to find this answer

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.