Which of the following expressions are equivalent to (x+y)-(-z) Choose all answers that apply:
A. (x+y)-z
B. x+(y+z)
C. All of the above

What is the 12th term of b(n)=-4-2(n-1)

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

In an improper fraction, is the numerator equal to, less than, or greater than the denominator