At Sammy's school, all seventh grade students are randomly arandomly assigned one of 7 books to read. The books are the show many of the possible combinations of reading groups and books would Sammy read a book he has not read before? A. 2 out of 7 possible combinations

B.5 out of 7 possible combinations

C. 7 out of 14 possible combinations

D. 10 out of 14 possible combinations

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Which number line correctly shows 0.8 + 0.3?

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?