Answer:
20 males, 7 females
Step-by-step explanation:
x=males
x-13=females
x+x-13=27
2x-13=27
2x=40
x=20
20-13=7
Use inverse cosine here because you have the side adjacent to angle A and the hypotenuse. On your calculator, press the 2nd key then cosine to see this on your display

then enter 8/17 to give you an angle measure of 62 degrees.
I think that she would need 5 medium boxes because
3 large = 300 beads
5 medium= 50 beads
5 small = 05 beads
that all = 355 beads in total