Which number produces an irrational number when added to 0.4?

Solve the inequality, then identify the graph of the solution. 2x – 1 > x + 2

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample