the barry family invited 100 relatives to their christmas party. 90 guests had italian heritage, 80 had german heritage and 75 had swiss heritage. what is the minimum number of people who claimed ancestry from all three heritages?

How are 3-d printers useful in studying evolution? a. to color the fossils of organisms b. to create clones of extinct organisms c. to create replicas of fossils d. to prepare paper cutouts of organisms e. to study the composition of fossils

Compare the advantages and disadvantages of using cash instead of a credit card to obtain good services

Tim earns $9.20 per hour when he works at the college library how much money does he earn by working at the library for 4.5 hours