How many solutions are there?

12x − 13y = 5
x = 23y + 10

A. There are no solutions.

B. There is one solution.

C. There are infinitely many solutions.

D. It is not possible to determine the number of solutions.

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

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