Solve for x, please help me

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Which two properties of equality could zoe use to finish solving for x? the equation is 3x - 4 = -10 for x so a either the addition or subtraction property of equalityb ether the multiplication or division property of equality c ether the addition or division property of equality d ether the subtraction or division property of equality just a simple a b c or d plz.