Answer the following with complete solutions:

14. At Randy Barcelona High, the total number of girls in the combined junior and senior classes is equal to the total number of boys in those two classes. If the senior class has 400 students and the junior class has 300 students and if the ratio of boys to girls in the senior class is 5 to 3, what is the ratio of boys to girls in junior class? a) 2:5 b) 1:2 c) 5:9 d) 5:7 e) 7:9 15. (32 )2 a) 18 b) 27 c) 81 d) 729 e) 6561 16 a) W/ M d) 72 e) 27 17. 2a'b'cs 2ac a) b) ac - C). 2b 62 ac d) 2ac e) 2abc 18. Ifx = -2, which of the following is the least in value? a) 1-x b) 1 +x c ) d) x2