What is number 18 and can you also explain how to do it

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

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 zeros of each function. f(x) = x^2 + 5x - 6