Answer:

1.) r¹¹

Solution:

r⁴ • r⁷

4 + 7= 11

r x r = r

2.) -20t⁵u³

Solution:

-5t³u² • 4t²u

-5t³u² • 4t²u

-20t⁵u²•u

-20t⁵u²•u

-20t⁵u³ (it's u3 di lang makita)

3.) x

Solution:

*cancel the two 7 and y then it will be

=x

4.) 8x¹²y⁷

Solution:

(2x²y)³(-x³y²)²

(2x²y)³(-x³y²)²

8x⁶y³ × (-׳y²)²

8x⁶y³ × (-׳y²)²

8x⁶y³x⁶y⁴

8x⁶y³x⁶y⁴

=8x¹²y⁷

5.) -12x⁴

Solution:

*cancel the two y³ and divide 24 and 2 then it will be

*then cancel x¹⁰ and x⁶ then it will be

= -12x⁴

I hope it helps (Brainliest if nakatulong)