Use the graphing method to solve the system of linear equations:

y = -x + 3 and y = x - 1
a) (-1,2)
b) (0,3)
c) (1,0)
d) (2,1)

(awnswer gets 80 points)

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

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

Which expression is equal to (f+g)(x)?