6 +(-15) = i need help I need help

-9

Step-by-step explanation:

If you have a problem that is plus a negative, you can get rid of the plus sign and move the minus sign to be the operation. In this problem, it would make the equation 6 - 15. We know that 6 + ? will equal 15 just as much as 6 - 15 = ?

6 + 9 = 15 therefore 6 - 15 must equal -9.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6

nope.   happens to me as well.

-aparri