State true or false ? justify your answer √2/3 is a rational number

Write the following numbers as the sum of three prime numbers.1. 433.672. 59​

answer my question guys its 50 write down all subsets of set {1,2,3}[1]​

Acar travels the first 19km of its journey at an average speed of 57km/h and the remaining 55km at an average speed of 110km/h. find the average speed of of the car for its entire journey. the answer is 88 4/5 but i can't seem to get it. would be highly appreciated : )