Natalie is playing a game using a fair coin. Contestants win the game if the fair coin lands tails up. if 250 contestants play the game, about how many of them are expected to win.

Which of these choices show a pair of equivalent expressions?

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.