You play a gambling game with your friend in which you win 30% of the time and lose 70% of the time. When you lose, you lose $1. What profit should you earn when you win in order for the game to be fair? (Round your answer to the nearest cent.)

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

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.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?