Answer:
$4.27
Step-by-step explanation:
Answer:
D (x + 6)(5ab − 4)
Step-by-step explanation:
The two binomials in the parentheses are the same so we can rewrite this as
(x + 6)(5ab − 4). We cannot simplay factor (x+6) anymore and (5ab − 4).
Answer:
Step-by-step explanation:
Prove that for any natural number 3^(n+4)-3n is divisible by 16.
(I'm going to assume that you mean 3^(n+4)-3^n.)
1. We can break up 3^(n+4)-3n into 3^n * 3^4-3^n (by the rule a^b*a^c = a^b+c).
2. Solve to get 3^n * 81 - 3^n
3. Factor out the 3^n, and you'll get 3^n(81-1), and simplify: 3^n(80)
You may notice that 80 is divisible by 16.
4. Rewrite what we got from the last step as: 3^n*5(16).
Hope this helped you!
