in a psychology class, 38 students have a mean score of 97.6 on a test. then 10 more students take the test and their mean score is 70.7. what's the mean score of all of these students together?

Acircle has a circumference of 7.850 units. what is its radius?

Which is the scale factor proportion for the enlargement shown?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?