The relation Ris defined on Z as follows: ∀ M , N ∈ Z , M R N ⟷ ∃ K ∈ Z ∣ ( M + N ) = 2 K [( M + N ) Is An Even Number]

Required:
Prove that the relation R is an equivalence relation.

This figure consists of a rectangle and semicircle. what is the perimeter of this figure use 3.14 for pi 60.84m 72.84m 79.68m 98.52m

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?