The ratio of length and breadth of a room is 4:3. If the room is 12 m long. Find is breadth​

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?

What is the output, or dependent variable of quantity? 1: x 2: f(x) 3: y