PLS HELPPP ITS DUE PLS HELP WITH THESE TWO QUESTIONS!

1. What is f(3)?
2. What is the given function?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)