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egoroff_w [7]
3 years ago
9

Help please how many should I use

Mathematics
2 answers:
Pepsi [2]3 years ago
8 0

Answer:

6 bananas

Step-by-step explanation:

Here you want to know how many 3/8 lb bananas you need to arrive at BETWEEN 2 and 2 1/2 lbs of that fruit.

The appropriate inequality would be:

2 lb  ≤  [ (3/8) lb ]x  ≤  2  1/2 lb.

We can make this problem easier to solve by using fractions throughout.  The LCD here is 8.  Note that 1 = 8/8 and 2 = 16/8.  Also, 1/2 = 4/8, so that 2 1/2 =  2 4/8 = 20/8.

Then  2 lb  ≤  [ (3/8) lb ]x  ≤  2  1/2 lb  becomes:

         16/8 lb ≤  (3/8 lb)x  ≤ 20/8 lb.  Multiplying this through by 8 to remove the fractions, we get:

            16 ≤  3x  ≤  20, '

Looking first at 16 ≤ 3x, we get 16/3 ≤ x   or   x ≥ 16/3.  But we're speaking ONLY of WHOLE bananas, not thirds of bananas.  Thus, x > 18/3, or x ≥  6.

Going through a similar process with  3x ≤ 20, we get x ≤ 20/3.  The first integer x value smaller than 20/3 is 18/3, or 6.

So there is only one possible value for x:  It is 6, as in 6 bananas.  This satisfies the original inequality   2 lb  ≤  [ (3/8) lb ]x  ≤  2  1/2 lb.

andre [41]3 years ago
5 0

Answer:

you should put 6 because 3/8 X 6 =18/8=2 2/6

Step-by-step explanation:

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