PLEASE HELP ME I NEED IT FAST Which set of ordered pairs represents a function?
O {(3,6), (3, 1), (9,0), (2, 2)}
O {(2,-5), (-3,6),(-1,-8),(-3,-4)}
O {(4, - 7),(-2,-1),(-7,4), (9, -1)}
O {(3,8),(-2, -9), (1, 4), (1,9)}

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?