Tema : matemáticas OPERACIÓNES CON NÚMEROS NATURALES 1- propongan problemas que puedan resolverse a mediante de las siguientes ecuaciones

1_ 200- 5n =40- n

2_ (2a + 1)-a = 5​

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

Which of the following represents the length of a diagonal of this trapezoid?

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great