Write the inverse of the relation.
{(1,5) (-3, 7), (12, 0), ( 15; -11)

Answer for 10 points show work you guys in advanced < 3

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree