Are positive expressions with negative exponents, negative?

yes

Step-by-step explanation:

Unless adding or subtracting, any positive expression with a negative exponent will always give a negative solution. I.e. (4^-2) 4×-4=-16

< 4, -5>

step-by-step explanation:

starting from g. we move 4 right and then 5 down to get to h. that means the vector is < 4, -5>