In a class of 28 pupils,13 have pencils,9 have erasers and 9 have neither pencil nor erasers. How many pupils have both pencils and erasers

Prove that quadrilateral is a rhombus.

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

If w = 6 units, x = 3 units, and y = 5 units, what is the surface area of the figure? 168 units2 240 units2 144 units2 96 units2