I did a POIN-TS Givea ways AND THESE PPL REP-ORT THEM I WILL HAVE TO STOP SO THIS IS THE LAST ONE

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

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).

Solve the system of equations y= 3/2 - 1, -x+ y =-3