Question

please solve this question please don't post any irrelevant comments or irrelevant answers ​

Answer 1

Answer:

a)1,3,5,7

b2

c isodd number 2x+5=9

9=5+2x

Answer 2

Hess's law of constant heat summation, also known simply as Hess' law, is a relationship in physical chemistry named after Germain Hess, a Swiss-born Russian chemist and physician who published it in 1840.