4 and 5 only (ignore what i already wrote if u want)

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

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