Out of 18 people in the glee club, 11 have dogs and 7 have cats. four people have both cats and dogs. how many club members have only cats?

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

He concluded that a heavier object dropped from the same height as a lighter object will land