In a telephone survey of 200 households, 108 households purchased wheat bread and 136
households purchased white bread. if 54 households purchased both types of bread, then how
many of the households surveyed did not purchase either brand?

Which of those sequences is a geometric sequence

The anwser cause i do not understand just plez

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )