Figure out the area of surrounding border around the circle and the area of the dotted section if the hole circle has a diameter of 9

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.