What is the y-intercept i’d the equation 2y+5x=-14

Can some one me with these questions

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

The four students in the table below each recorded the time and distance traveled while exercising. exercising distance (miles) time (minutes) gia 2 30 harris 5 50 ian 3 40 jackson 4 80 which list ranks the students from fastest walker to slowest walker? jackson, gia, ian, harris harris, jackson, ian, gia harris, ian, gia, jackson jackson, harris, ian, gia