Why is R_θ:R^2 →R^2 a linear transformation?

For linear transformations T:R^k →R^n and S:R^n →R^m , how is the composite (S∘T)(x) defined?

How can the unique matrix A that induces a linear transformation T:R^n →R^m be found?

What is the rank of a matrix A?

What does R^n denote in linear algebra?

Leigh, a Deaf middle schooler, goes to a school and is bilingual using ASL/English.  Her hearing brother, Rashawn, also goes to this school. They are both exposed to Deaf culture most of the day. Which school type are Leigh and Rashawn most likely enrolled in? 

María is an 8-year old girl with profound hearing loss. She just transferred school to the Valencia Elementary School in Orlando, Florida. Her parents want to call a meeting to set up a plan for María to have sign language interpreters, notetakers, and for her to get 1:1 instruction in Language Arts. What are María’s parents requesting?

At the Valencia School for the Deaf, teachers use spoken language and sign language at the same time to teach their students. Students are expected to also use this form of communication. What type of communication system best describes Valencia School for the Deaf use?

Dr. Qi, a Deaf professor, is teaching an undergraduate Deaf Education course. Which of the following should he prioritize the least: 

A particle that is in equilibrium has four force vectors in different directions acting on it.  The magnitudes of the force vectors are F1 = 5.1 N, F2 = 3.2 N, and F3 = 5.2 N and F4 = unknown. Identify the following statement that is TRUE for the particle system as described.