Evaluate:

3 - - 10-9 divided by (-1)

Solve: 3x+y=6 4x-2y=18 show all work !

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Find the commission on a $590.00 sale if the commission is 15%.