PLEASE HELP I GOVE BRAINLIEST PLEASE MAKE SURE THE ANSWER IS RIGHT OR I WILL FAIL!!

What is the product of (9)(-9)(-1)?
O -81
O -1
O1
O 81

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Pleasse me i need an answer. give me the correct answer. answer if you know it ! the club will base its decision about whether to increase the budget for the indoor rock climbing facility on the analysis of its usage. the decision to increase the budget will depend on whether members are using the indoor facility at least two times a week. use the best measure of center for both data sets to determine whether the club should increase the budget. assume there are four weeks in a month. if you think the data is inconclusive, explain why.

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =