How do you find out output and input

If f (a + b) = f (a) + f (b) - 2f (ab) for all nonnegative integers a and b, and f (1) = 1, compute f (1986)

Karl owns 28 golf balls. Some are green, some are blue and several are orange. One fourth are red. Are 7 golf balls definitely green?

Lupe tosses a ball up to Quyen, waiting at a third-story window, with an initial velocity of 30 feet per second. She releases the ball from a height of 6 feet. The equation h = - 16t2 + 30t + 6 represents the height h of the ball after t seconds.

Tell whether the function y+2x^2=-2 is quadratic

The perimeter of a rectangle is 36 meters. The length is 2 meters more than three times the width find the length of the rectangle

Last month, Ms. Andrea's math class had an average test score of 80. This month, the new average test score is 125% of the previous month's average score. What is the new average test score for the class?

8. If 6x2 = 54, then x = ? (1) 29.0 (2) 3.0 (3) 14.5

Jalen has 30 ounces of a solution that is made of up 30% acid and 70% water. How many ounces of water must Jalen add to this solution to create a solution that is 20% acid and 80% water?

The coordinates A (0,0) B (0,4) and C (2,0) are graphed and connected together. What 3 dimensional shape will be created

Sams fruit cellar earns a $0.40 profit for each apple that it sells and a $0.40 profit for each banana that it sells. What expression shows sams total profit from selling Apples (a) and banana (b) ?