bca
+Cab
——————
777
abc=42 1
13 has no shading, so I'm sorry I can't do it.
14.90×4=360 (minimum)
360+ 100=460 (points)
460÷5=92 (points)-full marks.
360+200=560 (point)
560÷6≈93 (points)-two full marks
360+300=660 (minutes)
660÷7≈94 (points)-three full marks
360+400=760 (minutes)
760÷8=95 (points)-four full marks.
Therefore, he must take at least four full sail tests in a row to achieve an average score of more than 95 points.
15. Group 1: 9 1 85 33, with a total of 209.
Group 2: 77 5 1 65, total 193.
209— 193= 16
1. There must be at least 14 seats.
15-2 = 13
13×2— 13= 13
13+ 1= 14 seats
2. 1800÷ 12×7—490
= 150×7—490
= 1050—490
=560 (yuan)
That washing machine, 560 yuan.