MATH SOLVE

2 months ago

Q:
# An elevator starts at the lobby and makes 4 stops. The positive numbers stand for going up, and the negative numbers stand for going down. Which expression gives the total number of floors traveled during the 4 stops?A |9+−12+5+−8|B |9|+|−12|+|5|+|−8|C 9−12+5−8D |(+9)+(−12)+(+5)+(−8)|

Accepted Solution

A:

Short answer B

The insert just confuses the issue. The total number of floors traveled is 34. Let's see which answer gives that.

A

| 9 - 12 + 5 - 8|

| - 3 - 3 |

| - 6 |

6 That's not 34, so it's not the answer.

C

9 - 12 + 5 - 8

-3 - 3

- 6

That's not 34 so C is not the answer.

D

Same answer as A and done the same way. Just remove the brackets.

|9 - 12 + 5 - 8 |

| - 3 - 3 |

6

Must be B. <<<<< answer

9 + 12 + 5 + 8

34

The insert just confuses the issue. The total number of floors traveled is 34. Let's see which answer gives that.

A

| 9 - 12 + 5 - 8|

| - 3 - 3 |

| - 6 |

6 That's not 34, so it's not the answer.

C

9 - 12 + 5 - 8

-3 - 3

- 6

That's not 34 so C is not the answer.

D

Same answer as A and done the same way. Just remove the brackets.

|9 - 12 + 5 - 8 |

| - 3 - 3 |

6

Must be B. <<<<< answer

9 + 12 + 5 + 8

34