The cost per year in electricity for an led nightlight plugged in constantly is about $0.02. if you use the nightlight for 80 years, what would the electricity cost you ?

electricity for an LED nightlight plugged,

the cost per year = $0.02

therefore, the total cost for 80 years = $0.02*80 = $1.6

your answer would be 10x - 1

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right