Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. to find the total number of pencils and pens, ralph evaluated 3×20+4x10=720. is his answer reasonable? explain.

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

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%

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.