15 points Need ASAP- Use the table to write a proportion ~ (table on pic)

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

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

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?