Acopy of machine produces 80 copies in 5 minutes. how many copies would be produced in 40 minutes?

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts.which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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%