A circle is drawn on graph paper. Each square of the graph is one square centimeter, and the circle has a diameter of 8 cm. What is the best estimate for the area of the circle in square centimeters? ANSWERS ARE ON THE SCREEN HELPPP

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .