Is 2 1/2a rational or not rational plz help

Solve the system of equations. y= 2x y= x^2 - 15

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

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