Question

Can anyone help me with these questions there is a photo of them the question of the triangle is find the value of a

Answer 1

13. a^2+7^2=15^2

a^2+49=225

-49=-49

a^2=176

a=13.266

14. 4 more girls chose soccer over softball.

15. I think it's a negative correlation or you have to find dots that can make a line

16. 3