Please SHOW WORK, will mark brainlist if correct

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.