Two numbers x and y, have a sum of 23 and a difference of 7. x is greater than y. Write two equations in x and y

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Find the value of x. round the length to the nearest tenth