4. Consider the figure below, If m of m

∠D = 60 degrees

Step-by-step explanation:

∠A + ∠B = 180

13x + 3 + 7x - 3 = 180

20x = 180

20       20

x = 9

∠B = 7x - 3

∠B = 7(9) - 3

∠B = 60

Angle B and D are vertical therefore they are congruent

∠D = 60

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

i those same problems in math and dont know how to do them