Vincent earns $258 on monday, $105 on tuesday, and $312 on wednesday. he spends $299 on thursday. how much money does he have left? first find an estimate, and then find the exact amount.

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.