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3 lớp 7A , 7B , 7C trồng được 180 cây . Tính số cây trông của mỗi lớp biết số cây trồng của các lớp đó tỉ lệ với 3 , 4 , 5
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How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?
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You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width
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Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.
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3 lớp 7A , 7B , 7C trồng được 180 cây . Tính số cây trông của mỗi lớp biết số cây trồng của các lớp...
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