PLEASE HELP

Both of the lines slope is equal to -7/4 but how do I know if they’re parallel ?

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate