Answer:
50r-93s
Step-by-step explanation:
-9(-4r + 6s) + 3s – 7(6s – 2r)
distribute
36r-54s+3s-42s+14r
add like terms
50r=93s
Angle of depression
So 400 stamps
African---> 100
Indian------> 1/10 x 400
= 40
European---> 400-40=360
1/3 x 360
= 120
so 120+40+100= 260
400-260
= 140 stams from US
26^9
167
