When solving the following system using elimination, what should you do first to solve? x+3y=−4
4x−5y=1

Multiply the second equation by -3.

Multiply the first equation by -4.

Multiply the first equation by -1.

Multiply the second equation by -1.

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