Christy bought an 8 foot piece of lumber to trim a bookshelf. altogether, she needs 100 inches of lumber for the trim. did christi buy enough lumber? explain

How do i do this activity, is appreciated

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).

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?