Step-by-step explanation: I know my answer is correct because,according to the law of conservation you will half yo think about what you are doing so what i did was look at the velocity first so 15 and -10 . but then i realized that i could multiply 150 by -10 even though it is a negative number and i got 1,500
HOPE THIS HELPS ;D ;D ;P sorry for all the faces and i took the test
