Which of the following situations could be represented by the expression - 14+ (- 7)? A Matt owes $14 to his mom and $7 to his friend.
Melissa made $14 at her job and spent $7 on lunch.
Rafique scored 14 points on Tuesday and 7 on Wednesday.
D
Katrina dove 14 feet down in the water and then went up 7 feet.

Matt's

Step-by-step explanation:

he has to give away $14 (-14)

and also $7 (-7)

The others have positive numbers.

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