Answer:
For (a) select: 6x & 2x+4x
For (b) select: 8•1+8•9y & 8+72y
Step-by-step Step-by-step explanation:
Simplifying.
(a) has the same variables and can be added together to equal 6x, but breaking it down the answer 2x+4x ultimately equals the same thing.
(b) can be simplified through distributive property so 8•1 and 8•9y, or 8•1+8•9y, which can be finalized as 8+72y and cannot be simplified further.