PLEASE USE ROW OF OPERATIONS AND SHOW WORK. Use row operations to solve the system.
X + y = 10
X - y = 6

Select the correct choice below and, if necessary, fill in the answer box with

A. The solution set of the system is ( ).
B. There are infinitely many solutions.
C. There is no solution.

12 :)

no jk i suck at math

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