I will Mark you brainliest if you explain your work

(-0.5, -1 ) or (-1/2,-1)

Step-by-step explanation:

(-2,-5) (1,3)

To find the midpoint between these two numbers find the average of the x and y coordinates.

-2 + 1 = -1 /2 = -0.5

-5 + 3 = -2/2 = -1  

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