A man has a mads of 120 kg. He reduces his mass by 15%. How many kilograms is that?

(Answer is 18 but i need an explanation)

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

10x − 5y + 14 = 0 whats the answer pls