Do the indicated operations, express your answers in lowest terms

Step-by-step explanation:

This equation may look difficult, but let's take it step by step. We are given the equation .

We can simplify this to through the difference of two squares formula. Now, we need to make the denominators the same, so:

We can finally combine the fractions since they have the same denominator:

We distribute the negative:  

From here, we combine like terms:

There's still one more step, we can factor out a two from the numerator: so that we can cancel out the term (x+y).

We are left with

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag