19,1y+121.4+0.9y при y=48.5

Question

19,1y+121.4+0.9y при y=48.5

Answer 1

19,1у+0,9у+121,4=у*(19,1+0,9) + 121,4 = 20*у +121,4

20*48,5+121,4=970+121,4=1091,4