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use sigma notation to represent the sum of the first six terms of the following sequence: 4, 12, 20, …

the summation from n equals 1 to 6 of negative 4 plus 8 times n
the summation from n equals 1 to 6 of 4 plus 8 times n
the summation from n equals 1 to 6 of negative 1 plus 8 times n
the summation from n equals 1 to 6 of 1 plus 8 times n

(if that is confusing, look at actual answer choices below)

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

The pair of coordinates that do not represent the point( 5,150’) is a. (5,-210) b. (5,210) c. (-5,330) d. (-5,-30)