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4. A bag contains only two types of coins. The total value of the 30 coins in the bag is $6. Of the 30 coins, x coins are worth $0.10 each and y coins are worth $0.25 each. If there are no other coins in the bag, which of the following systems of equations can be solved to find the number of each type of coin in the bag?
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(B)were absent so often that I were afraid she might be
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That tie goes well with you suit.
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The men in suits. The women in fur coats.
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a: hey eve, how are you?
B: I¡¯m fine, celia. And you?
A: I¡¯m ok. I¡¯m so busy!
B; do you have a lot of homework?
A: yes. Don¡¯t you?
B: of course I do!
A: which class are you working on right now?
B; I¡¯m studying for my chemistry exam tomorrow.
A: are you in mrs.green¡¯s class?
B: yes. Are you?
A: yes. We must have the same exam tomorrow!
B: do you want to study together?
A; sure. This library is too quiet though.
B; do you want to go to and empty classroom?
A: that sounds good.
B; ok. Let¡¯s go!
Intermediate
A: lucy, you¡¯re back. How was your first day of school?
B; it was great. I had a really good time.
A; what classed did you have?
B: well, I had English from 9:00 to 11:00, art from 12:00 to 2:00, and math from 2:00 to 4:00.
A: what do you think about the teachers?
B; to be honest, I liked all of them, except for the math teacher. Though he must be quite young, he seem like an old person. He¡¯s so boring!
A: that¡¯s too bad. How was your English teacher?
B: she was great. In today¡¯s class, she gave us a lecture on how to be a good student. She told us not to cram for exams, and to pay more attention on communicating that memorizing.
(D)and there is more dependence of people
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