The dimension of the null space of A is R^4 because (select all correct answers -- there may be more than one correct answer): A. The basis we found for the null space of A has three vectors. B. rref(A) is the identity matrix. C. rref(A) has three free variable columns. D. Three of the four columns in rref(A) do not have a pivot. E. rref(A) has one free variable column. F. Two of the four columns in rref(A) have pivots. G. rref(A) has a pivot in every ro

Barbara has a good credit history and is able to purchase a car with a low-interest car loan. she co-signs a car loan for her friend jen, who has poor credit history. then, jen defaults on the loan. who will be held legally responsible by the finance company and why? select the best answer from the choices provided. a. barbara will be held legally responsible because she has a good credit history. b. jen will be held legally responsible because she drives the car. c. barbara will be held legally responsible because she is the co-signer. d. jen will be held legally responsible because she has a poor credit history. the answer is a

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.