Answer:
a² + b² = 22
Step-by-step explanation:
(a + b)² = a² + 2ab + b² ← substitute a + b = 6 and ab = 7
6² = a² + 2(7) + b²
36 = a² + 14 + b² ( subtract 14 from both sides )
22 = a² + b²
Since all the terms are odd, the last four terms would be 115+117+119+121
115 + 117 = 232
232 + 119 = 351
351 + 121 = 472
Answer: 472
I hope this helped :)
Remark
The sample was not voluntary. 284 people at random were selected. A is incorrect.
The question was a "yes/no" question. You either supported the motion, or you did not. One response did not influence the other. B is incorrect.
There's no data missing that can't be calculated. 20 people refused to answer for one reason or another. A very large number of people supported the pole so the 20 people would not make a difference no matter how they voted. Still the 20 people were not reported but could be calculated. The better answer is D. <<<< Answer.
You could say C but there are other possible reasons and a more general answer is needed.
