What’s the area of a square the side is 7x-3

Could someone with number 1 and 2

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

Could someone me with this question i’ve been stuck on it for 20 minutes