What is the reference angle and cosine of 7pi/6

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

What term makes it inconsistent y=2x - 4 ?