The terms in the sequence decrease by the same amount each time: 9, 6 ,3 ,0, -3, -6
Work out ,in term of n, the nth term of the sequence

-3n+12

Step-by-step explanation:

The sequence is decreasing in value as it goes along, meaning that the nth term needs to be negative for it to work. It's decreasing by 3 so we write -3. We then add to -3 to get to 9. This means we add 12 to get to 9. So we put those 2  together and get -3n+12

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.