Determine the common ratio for each geometric sequence 64, -32, 16, -8

Please help me

Based on what i know about mean, this doesn't add up.

In which form is the following function written? y = - 2(x – 3)(x + 5)

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent