Answer:
Explanation:
Unfortunately I only know how to do the second and third one. I could try to do the first one, but Im unsure if itll be right. So the rule for exponents is that when you take an exponent to a power, you simply multiply them. So, for #1, I would multiply the 7 and 3 to get a power of 21. Im getting 4x^4y^21 but Im not confident at all in that answer.
I know exactly how to do the second and third problem. You would just mulitply the 6 and -2 to get -12. You have to move that x^-12 to the denomatior to get:
For the third one, when you divide exponents, you subtract them.
81/9 = 9
x^5/x^2 = x^3
y^2/y^3 = y^-1
z/z = 1 (cancels out)
So you have this:
Move the y to the bottom to get: