"9. if a is a non-zero constant, determine the vertex of the function y = -x2 + 4ax + 3 in terms of a. a) (2a, 4a2 + 3) b) (-2a, 12a2 + 3) c) (a, 3a2 + 3) d) (-a, -5a2 + 3) e) none of these

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.