Can anyone help me with this math puzzle? (whatever number answer you get for each question should be a number with one of the letters in the top right)

20points+brainliest

thank you :)

Which expression is equivalent to -12(3x-3/4)

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?