How many sets of 7 questions can be chosen from a file of 25 questions?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0