9514 1404 393
Answer:
(c^3-3c^2d+3cd^2-d^3)/c^18
Step-by-step explanation:
It appears you want to simplify ...

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The relevant rule for exponents is ...
a^-b = 1/a^b
The coefficients of the expansion of the binomial are found in Pascal's triangle.
X = Harry's Age
Nick's age is 7x
In 6 years Harry is 7x+6, and Nick is 5(x+6)
7x+6=5x+30
2x+6=30
2x = 24
x = 12
Harry = 12 years old and in 6 years Harry will be 18.
Answer:
#2. 1 = 50° 3 = 50° 4 = 130°. 2. ∠3=137°