Two​ trains, Train A and Train​ B, weigh a total of 421 tons. Train A is heavier than Train B. The difference of their weights is 401 tons. What is the weight of each​ train?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Does anyone know how to do geometryme with this problem

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition