Need help please which pair of angles are vertical

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.