Four married couples have bought 8 seats in the same row for a concert. In how many different ways can they be seated:
i. Without any restrictions?
ii. If each couple is to sit together?
iii. If all the men sit together to the right of all the women?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Which value of y will make the inequality y< -1 false?

Express -5 2/5 as an improper fraction.