How can you tell whether a group of ratios represents a proportional relationship?

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.