On friday, 3/5 of the students wore blue shirts and 1/4 of the students wore white shirts. what fraction of the students wore either a blue shirt or white shirt? (explain )

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Robin and john each a a 12 inch pizza about how many square inches of pizza did they eat? estimate how much pizza they ate