WITHOUT using a calculator what is 330 - 713 comment your answer. This is the trippiest thing in my life

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?