K=y/x k=4/5 y=2/3 what is value of x

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

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle