Give a scheme definition that will determine the sum of 30, 31, 30, 15 and bind the identifier days-in-semester to this sum. be as concise as possible.

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

X+ y = 5 ; x - y =3 solve using linear combination

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