Which is the equation for a sphere with the center (2,-9,-1) and radius srqt (r)

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2