NEED HELP ASAP The graph shows the equation x=y^2 use the slider for a to move the vertical on the graph. According to the vertical line test , is this equation a function why or why not ?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Jermaine has t subway tokens. karen has 4 more subway tokens than jermaine. raul has 5 fewer subway tokens than jermaine. which expression represents the ratio of karen's tokens to raul's tokens

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?