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Mila [183]
3 years ago
11

Read each problem carefully and solve as required then answer the questions that follow.​

Mathematics
1 answer:
dimaraw [331]3 years ago
6 0

Answer:

Step-by-step explanation:

1) Number of jeans = x

Number of blouses = y

Total items = 6

x +  y = 6 -------------------(I)

       y = 6 - x

Cost of 'x' jeans =  300 *x = 300x

Cost of y blouses = 100 * y = 100y

Total amount  = Php. 1000

300x + 100y = 1000 ------------(II)

2) Substitute y = 6 - x in equation (II)

         300x + 100(6-x) = 1000

300x + 6*100 - x *100 = 1000

 300x + 600 - 100x   = 1000

                200x + 600=1000

                          200x = 1000 - 600

                          200x = 400

                               x = 400/200

x = 2

Plugin x = 2 in equation (I)

2 + y = 6

     y = 6 - 2

     y = 4

Number of jeans = 2

Number of blouses = 4

3) This equations have only one solution. So, they are consistent and independent

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Pasta comes with tomato sauce and can be ordered with​ some, all, or none of these ingredients in the​ sauce: {onions,​ garlic,
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Answer: Hello!

So the list of ingredients in the sauce are:

{onions,​ garlic, carrots,​ broccoli, shrimp,​ mushrooms, zucchini, green​ pepper}

there are 8 possible elements in the sauce, so we need to see the combinations for this elements in the sauce.

let's count!

0 ingredients; there is only one combination with 0 ingredients.

1 ingredient: there are 8 combinations with 1 ingredient, one for each.

2 ingredients: now star playing with combinatorics, so the combinatory between A and B is: \frac{A!}{B!(A-B)!}, so for 8 and 2 we get:

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3 ingredients: Similar as before; the combinatory for 8 and 3 is: \frac{8!}{3!*5!} = 8*7 =56

4 ingredients: for 8 and 4 we have: \frac{8!}{4!*4!} = \frac{8*7*6*5}{4*3*2} = 2*7*5 = 70

5 ingredients: You can think that now we are counting the combinations of 3 ingredients that we are not using, so the combinations are the same as for 3 ingredients: 56

6 ingredients: Similar as before, here are the combinations of the two ingredients that we are not using: 28

7 ingredients: there are 8 options if we decide to not use only one ingredient.

8 ingredient: there is 1 option in this case, same as the case with no ingredients

And now, we need to add all those combinations:

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