9) John bought a pair of shoes that normally costs $79, but was on sale for 15% off. Sales tax was 8.25%. What was the total cost for the pair
of shoes?

79/100 X 15 = 11.85

79 - 11.85 = 67.15

67.15/100 X 8.25 = 5.539875

67.15 + 5.539875 = 72.689875

total cost $72.69

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950