What difficulties are you have with this math problem? Don't expect other poeple to do your work for you. That is what we call cheating.
To write it out in order to find the answer, you would do the following:
(-3/4) * (-12) =
or
-7.5 * (-12)
You can plug the above straight into a calculator to get the answer you seek.
Good question. Report it to the developer of the site.
300,000,000 m/s
You can calculate this by simply doing the following:
(1/3)*(1/3)*(1/3)
(1/3)(1/3)(1/3)
If you were trying to add 1 half and two quarters, you would input the following:
(1/2) + (2/4) =
What difficulties are you having with this problem? Don't expect people to solve your math problems for you. That is called cheating.