1. Students were split in 2 groups for an activity. There are 16 students in group A and 15 students in group B. If 25% of group A and 20% of group B consisted of girls, identify
the group which has a lesser number of girls.
and I

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Asap! i'm not good math and i'm lost.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'