What is the sum of 4 and -5

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

Given right triangle abc, what is the value of tan(a)?

Atailor in a suit shop should understand relative lengths to measurement units. which unit of measurement would normally be used to measure fabric