Can someone help me with this please ?

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years