Pls

out of graphing, substituion, and elimination which do you find the most difficult? which do you like best? why?

it's really just your own opinion of which is difficult or easier but in my opinion Substitution is more difficult because you have to substitute in the different equations, and it can take more time. I personally like Elimination best because it cancels out variables and can be quicker to use. hope this helps:)

were you happy with the first answer? I can comment mine if needed. Just let me know. :)

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490