Pls help on both questions!tysm if u help me and I will pick brainliest if there's two answers

Add the fractions and simplify 1/2+ 1/3

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?

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.