Evaluate the expression if x = −4, y = 10, z = −9. Expression: x - y - z *

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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%