Which ratios form a proportion? A.) 4/9 and 9/4
B.) 4/11 and 6/13
C.) 4/10 and 10/25
D.) 3/5 and 9/25

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).