Yes you are correct that is the answer.
Answer: 20
Step-by-step explanation:
all you need to do is substitute the variables into the given expression, y-5b would turn into 5-5(-3) then you solve and you get 5-(-15) = 5+15 = 20, so youre answer is 20
3 females 15 females
–––––––– = –––––––––
2 males n males
cross multiply
3n=15*2
3n=30
n=10
10 males
W6 + 8 = 4
w6 = -4
w = -4/6
w = -2/3