**Answer:**

D)

**Step-by-step explanation:**

a² + b² = c²

x² + 8² = 16²

x² + 64 = 256

x² = 192

**Answer:**

f(8) = 192

**Explanation:**

f(x) varies directly with x²

This means that:

f(x) = kx²

where k is the constant of proportionality.

Now, we are given that:

f(x) = 75 at x = 5

Substitute to get k as follows:

f(x) = kx²

75 = k(5)²

75 = 25k

k = 3

This means that the equation is:

f(x) = 3x²

Now, to find f(x) at x = 8, all we have to do is substitute with x = 8 in the equation as follows:

f(8) = 3*(8)²

f(8) = 3*64

f(8) = 192

Hope this helps :)

Distribute

a(b+c)=ab+ac

3p(3pq-4)=9p^2q-12p

we have

3p^2q+9p^2q-12p+5p^3

add like terms

4p^3+12p^2q-12p

**Answer:**

1\3

**Step-by-step explanation:**

**Answer:**

y=-4x+1

**Step-by-step explanation:**