Answer:
81
Step-by-step explanation:
9 × 3n= 3^7
9×3n= 2187
27n= 2187
n= 2187/27
= 81
Hence n= 81
All you have to do is divided 43.54 divided by 3.5 which is 12.44 mph
See, pls, offered explanation:
1) the both equations are linear function, it means system made up of the both equation has the only solution.
2) if to prove this:

Answer: one solution.
Answer:
Step-by-step explanation:
The diagram of the scenario is shown in the attached photo.
The shadows of Eden and Jane formed two right angle triangles ABC and DBE. Also, triangle ABC and BDE are similar triangles. Therefore
DE/AC = DB/AB = BE/BC
Let DE be x feet
AC = 5 1/3 = 16/3 feet
BE = 8.5 = 17/2 feet
BC = 8 feet
Therefore
x/(16/3) = (17/2)/8
3x/16 = 17/16
Cross multiplying
3x = 17
x = 17/3
x = 5 2/3