Please answer, I have no idea what i'm doing.

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12