Which equations are correct?

select each correct answer.

−3y4(5y2+2)=−15y8−6y4

−7x2(4x3+2)=−28x6−14x2

−5d3(3d2+4)=−15d5−20d3

−2b3(6b2+5)=−12b5−10b3

Is this a polynomial function? i need to know asap

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

How many 2/5s are in 1 and 1/2 plz someone me right now