3[25-2(9+3)]=?. Pleas

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).

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.