Which relation is NOT a function? {(1, -5), (3, 1), (-5, 4), (4, -2)} {(1, -5), (-1, 6), (1, 5), (6, -3)} {(2, 7), (3, 7), (4, 7), (5, 8)} {(3, -2), (5, -6), (7, 7), (8, 8)}

The second function

Step-by-step explanation:

It repeats x values, so it does not pass the vertical line test. By definition, a function can only have one y value for every x value, so if there is more than one x value in a function, its not a function

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours

(f+g)(x) = 3^x+10x+4x-2

      =3^x +14x-2

choice b