I have a test in 2 days. please help me with this review

show work if possible or explain

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

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.