-21p-6n, p(-1/7, -2/3) n(0.7, 2)

To simplify the expression -21p - 6n, we can substitute the given values for p and n.

Given: p = (-1/7, -2/3) and n = (0.7, 2)

Let's substitute these values into the expression:

-21p - 6n = -21(-1/7, -2/3) - 6(0.7, 2)

Now, let's simplify the expression:

-21(-1/7, -2/3) = (3, 14/7) -6(0.7, 2) = (-4.2, -12)

Now, let's sum up the simplified expressions:

(3, 14/7) + (-4.2, -12) = (3 - 4.2, 14/7 - 12) = (-1.2, -74/7)

Therefore, the simplified expression -21p - 6n, where p = (-1/7, -2/3) and n = (0.7, 2), is (-1.2, -74/7).