Josie is paid 500$ for working a 40 hour week. Find her constant rate of change.

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,

60: 45 =12: 9 =4: 3 so the answer is 4: 3