(8a-3)^2 answers are a. 64a^2+9 b. 64a^2-48+8 c. 8a^2+9 d. 8a^2-48a+9 will someone break it down for me

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking?