When the number of marbles jill has is subtracted from 20, the result is the same as adding 16 to the number of marbles.
how many marbles does jill have?
is it 20 - x = x + 16 and how do i find x

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