Atriangle has a perimeter of 10x+2. two sides have lengths of 5x and 2x+9. what is the length of the 3rd side?

As we know perimeter of triangle is equal to sum of all three sides.

Let the third side = a.

So we can write perimeter as = 5x + 2x + 9 + a

As given perimeter = 10x + 2

So we can write 10x +  2 = 7x + 9 + a

10x + 2 - 7x - 9 = a

3x - 7 = a

So third side = 3x - 7.

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.