Answer:
The answer is A.
Step-by-step explanation:
Here's the right answer <span>x = -11/7, y = 11/4
</span>
Explanation:
For n=1, 19^n -13 = 19 -13 = 6, a multiple of 6.
For n = n+1, ...
19^(n+1) -13 = 19(19^n -13) +18·13
the factor (19^n -13) is divisible by 6 (for n=1), and ...
the factor 18·13 = 6·39 is divisible by 6.
Hence 19^n -13 is divisible by 6 for all n ≥ 1.
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Another way to look at this is to do modulo 6 arithmetic on the expression:
19^n -13 mod 6 = (19 mod 6)^n - (13 mod 6) = 1^n - 1 = 0
If the expression mod 6 is 0, then the expression is divisible by 6.
Answer: 25%
Step-by-step explanation:
From the question, we are informed that Allison earned $200 the first month she worked and $250 the second month she worked.
The percentage increase in her salary will be calculated as:
= Salary Increase / Old salary × 100
= (250 - 200) / 200 × 100
= 50/200 × 100
= 1/4 × 100
= 25%
The percentage increase is 25%
Answer:
i dont know but i think that is reproduction