??? Math help pls imma really need it

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

What additional information could be used to prove abc =mqr using sas? check all that apply.

There are 18 female students and 16 male students in a class. which of the following expresses the ratio of female students to male students in simplest form? а) 10 b) 9 to 8 c) 8: 9 d)18/16