What is the absolute value of 8.7

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)