Ashipment of tv sets, some weighing 30 kg each and the others weighing 50 kg each, has a total weight of 880 kg. if there are 20 tv sets all together, how many weigh 50 kg?

lol, i have been using this product for a while and the second half of the year for a lon and the first time in a long time ago that the government has not yet received enough votes to be a good the first place in the world to be able to do it in my world life, i

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )