4 units x 5 units = 20 units
The term units is used if the numbers in the question are not identified as to length, or weight, etc, such as cm, km, lb, kg, etc.
Perimeter: 2(4+5) = 18 units Area: 4*5 = 20 square units
2*(4 + 5) units = 2*9 units = 18 units.
60 units^3
It will be a right angled triangle with sides of 3 and 4 units with an hypotenuse of 5 units in length.
120
Perimeter: 2(4+5) = 18 units Area: 4*5 = 20 square units
A shape with a perimeter of 16 units could be a square with each side measuring 4 units (4 + 4 + 4 + 4 = 16), a rectangle with dimensions of 3 units by 5 units (3 + 5 + 3 + 5 = 16), or a triangle with sides measuring 6 units, 5 units, and 5 units (6 + 5 + 5 = 16). These are just a few examples of shapes that could have a perimeter of 16 units.
2*(4 + 5) units = 2*9 units = 18 units.
Don't really understand the question but will try to clarify. 3 units (wholes) is 3; 5 tenths is .5; if by 4 tens you mean 4 tenths, it is .4; if you mean 4 x 10, it is 40; if by 7 hundreds you mean 7 hundredths, it is .07' if you mean 7 x 10, it is 70. If you are adding 3 units + 5 tenths (,5) + 4 tenths (.4) + 7 hundredths (.07), set up the problem as follows: 3.00 + .50 + .40 + .07 and add. Answer is 3.97
60 units^3
A rectangular prism with sides of 6 and 4 and 5 units has a volume of 120 cubic units.
Compound AB would have a total of 9 mass units, calculated by adding the units of element A (4 units) and element B (5 units).
It will be a right angled triangle with sides of 3 and 4 units with an hypotenuse of 5 units in length.
120
If you mean a width of 5 units then the volume is: 9*5*6 = 270 cubic units
If you mean points of (-2, 4) and (5, 4) then using the distance formula it is 7
4*5 = 20 units of length.