If two is subtracted from twice a number the result and 10 less than the number find the number. Equation will solve this

Can someone me out here number 4 plz

Which is f(5) for the function –2x2 + 2x - 3?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.