Hi people of i have a question what is 6 minus negative 4? with explanation . have a good night

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?