If f(x)=6x-2, what is the value of f(4)?

Please explain I don’t understand these questions.

Question 1(multiple choice worth 1 points)(07.06 mc)a group of students must collect at least $150 to organize a science fair. they have already collected $30. which graph best represents all remaining amounts of money, in dollars, that thestudents should still collect to organize the science fair? -210 -180 -150 - 120 -90-60 -300306090 120 150 180 210-210 -180 -150 - 120 -90 -60 -30 0 30 60 90 120 150 180 210-210 -180-150 - 120 -90-60-300 30 60 90 120 150 180 210-210 -180 -150 - 120.90 -60 -30 0 30 60 90 120 150 180 210

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?