temperature dropped 5 degrees / hr for 7 hr; use integer to

[mccallum]

The temperature dropped 5 degrees each hour for 7h. Use an integer to represent the total change in temperature.

would it be 7 *-5=-35 or -5+-5+-5+-5+-5+-5+-7+= positive 35? Because the first one is a positive times a negative so answer would be a negative but the second option is an odd number of negatives would be a positive?

 

[Deleted member 4993]

Re: temperature drop word problem

The temperature dropped 5 degrees each hour for 7h. Use an integer to represent the total change in temperature.
would it be 7 *-5=-35 <<< Correct

or

-5+-5+-5+-5+-5+-5+-7(?)+= positive 35? <<< Incorrect - when you ADD negative numbers - no matter how many times - the sum is negative.

Because the first one is a positive times a negative so answer would be a negative but the second option is an odd number of negatives would be a positive?