To multiply (4m) by (2m), you multiply the coefficients and the variables separately. The coefficients (4) and (2) multiply to (8), and (m \times m) equals (m^2). Therefore, (4m \times 2m = 8m^2).
It is: 2m times 2m is equivalent to 4m^2
4m
6m + 7 - 2m + 1 = 4m + 8 If you meant: (6m + 7) - (2m + 1) = 4m + 6
40m^3
Well, darling, if the length of your rectangle is 4m and the width is 2m, then the perimeter is simply calculated by adding up all the sides, which gives you 4m + 4m + 2m + 2m, totaling 12 meters. Voilà, there's your answer!
40 cubic meters
6m + 5n - 4m + 7n = 2m + 12n
None. By definition a hole is an empty space.
2m + 13n
A rectangle is one of the six faces of a cuboid (a rectangular parallelepiped). The area of a rectangle 4m long and 2m wide is 8m2. Multiply this by the thickness (or depth) of the cuboid to obtain its volume.
4m - 8 = 6m =>4m - 6m = 8 => -2m = 8 => m = -(8/2) => m = -4
2m(5k - 4m)(25k2 + 20km + 16m2)