Is a 33 1/3% decrease followed by a 50% increase greater or less than the original?

Solve the system of equations. y= 2x y= x^2 - 15

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up