Answer:7x-29
Step-by-step explanation: simplify and open the brackets.remember that a letter and a number cannot be sumed up but can my multipled together
Answer:

Step-by-step explanation:
we know that
The "power rule" tells us that to raise a power to a power, just multiply the exponents
so

we have

Applying the "power rule"

-2y-6-7y
-9y-6
I hope that this helps!