What is 5x+7y+8z-2x+3y+5-z

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

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