Answer:
Un = -n²
Step-by-step explanation:
Un = -n²
it's a quadratic term but with minus sign, just it
U1 = -1² = -1
U2 = -2² = -4 and so on
Answer: 504
Step-by-step explanation:
When we select r things from n things in a order , we use permutations.
Formula for permutation: 
Given : The number of family members who are potential kidney donors. = 9
Number of people needed to be selected for best match, a second-best match, and a third-best match ( in an order)=3
Then, the number of possible orders are = 

Hence, the number of possible orders 504.
<span>1 and 2. Taneisha can send as few as 0 texts, or n>=0.
3 and 4. Taneisha can send as many as 300 texts in a month, or n<=300.
5. In this case, n>=0 and n<=300.
6. Putting these in compound form to make them one statement gives 0 <= n <= 300.</span>
276400(0.035) = $9674 the equivalent value in dollar for every increase in the house then multiplied by 25. $9674*(25) = $241850 + the current value of Alex's home. $276400+ $241850 = $518250 that would be the value of Alex's home in 25 years. The percentage is (518250-276400)/ 276400 =0.875 *100 = 87.5 % increase in value. I hope this would help.