2.25h(60m/hr)(1/3)=45m
So Rick spends 45 minutes studying math per night.
Simplifyiing
the greatest common factor is 3 so
3x - 9y + 12 = 3(x - 3y + 4)
The fraction 31/6 as a mixed number would be 5 1/6 because 6 goes into 31 5 times and you have 1 left over! So it would be 5 1/6. Hope that helps!
Cubes have 6 equal faces, and the surface area is the sum of all of these faces. Thus, one face would be 1/6 of the cube's surface area, or about 17%.
The area of a circle is pi times radius^2
So if you use 3.14 x 16, it gives you approximately 50.264
