If u = 3 – 4i and v = 3i + 6, what is u – v.?

Step-by-step explanation:

We have been given two equations and . We are asked to find the value of .

Let us subtract value of v from u as:

First of all, we remove parenthesis as:

Now, we will combine the real part of equation with real part and imaginary part with imaginary part as:

Therefore, the value of   is .

b. hoped i'm right lol

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