Which TWO equations relate the measure of ∠4 to the measures of ∠1, ∠2, and/or ∠3. A. m∠4 = m∠1 + m∠2
B. m∠4 = m∠2 + m∠3
C. m∠4 = 180° – (m∠1 + m∠2)
D. m∠4 = 180° – m∠3

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

is there supposed to be a picture here?