a water tank had three inlets, which independently can fill the tank in 20,40,30 minutes, respectively. How much time does it take to fill the when all work together

Hope i can you!

Where the white dots are is where your points should be plotted.a translation is simply just moving something from one place to another. in this case, you would move each plot point of the original shape 2 units up, and 5 units to the left.

The linear equation is: y=ax+b