x^2 - y^2 - 2y - 1
x^2 - (y+1)^2
Graph made up for the given function f(x)=(1/2)^x
Answer:
216 boys
Step-by-step explanation:
450 students: 20% girls, 80% boys
450*20%=90 girls
450*80%=360 boys
Students having mobile phones: 40% (OF THE 90) girls, 60% (OF THE 360) boys
90*40%=36 girls
360*60%=216 boys
[We honestly don't need to care about the girls without mobile phones as they are only asking how many boys have mobile phones]
5+ 3 Well a times it would probably be 40
