23 subtracted from the product of 12

-121

Step-by-step explanation:

23-144=

=121

12-23=-11

I say this because when subtracting different signs keep the one of the greater absolute value. and 23-12=11 last add a decimal to the beginnings.

-11

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )