I need help! plz (listing BRAINLIST and giving points) ​:D​

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.