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zaharov [31]
3 years ago
11

The expression 7d gives the number of days in d weeks . Evaluate 7d for d=12. How many days are in 12 weeks?

Mathematics
2 answers:
e-lub [12.9K]3 years ago
4 0

Answer:

84

Step-by-step explanation:

RSB [31]3 years ago
3 0

Answer:

84 days are in 12 weeks

Step-by-step explanation:

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There are seven shuffled question cards left in a game. Kim has to pick two of them and answer them both correctly to win. What
Yakvenalex [24]
"n choose k" gives you the number of possible unique combinations...

n!/(k!(n-k)!)

n=number of elements to choose from and k=the number of elements that you choose...in this case:

7!/[2!(7-2)!]

7!/[2!5!]

21

There are 21 possible different two question combinations that she can pick.


4 0
3 years ago
3.Can we multiply a 2x3 matrix by a 3x2 matrix? If yes, what dimensions will the product matrix AB have ?
Allushta [10]

Answer:

Yes, the dimensions will be 2x2

Step-by-step explanation:

When multiplying matrices you have AxB by CxD. You can only multiply matrices if the inner number is the same.

Ex. 2x3 by 3x2 or QxD by DxW

The dimensions of the result will depend on the outer numbers.

Ex. 2x3 by 3x2 has a 2x2 result or QxD by DxW has a QxW result  

4 0
3 years ago
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How many quarters can you get for a five dollar bill
sweet [91]
You can get 20 quarters for a five dollar bill. Just divide 5.00 by 0.25 and you get 20. To check, you can multiply 20 by 0.25 and you will get 5.00 or 5.
4 0
3 years ago
What is the solution of 2|2x-1|-8=18?
Maurinko [17]

Solve for |2x-1|:

2|2x-1|-8=18\implies2|2x-1|=26\implies|2x-1|=13

Now if 2x-1\ge0, we have |2x-1|=2x-1 and

2x-1=13\implies2x=14\implies x=7

On the other hand, if 2x-1, then |2x-1|=-(2x-1)=1-2x and

1-2x=13\implies-2x=12\implies x=-6

4 0
3 years ago
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Quadrilateral ABCD has the following vertices:
GenaCL600 [577]

9514 1404 393

Answer:

  yes

Step-by-step explanation:

The figure can be shown to be a parallelogram by showing the sum of endpoints of the diagonals is the same.

  A +C = B +D

  (0, 6) +(0, -4) = (0, 2) = (3, 5) +(-3, -3) . . . . diagonals bisect each other

If the diagonals of a quadrilateral bisect each other, it is a parallelogram. A parallelogram with a right angle is a rectangle. So, ABCD is a rectangle.

_____

<em>Additional comment</em>

The midpoint of each diagonal is half the sum of the end point coordinates. That is, the midpoints are (0, 2)/2 = (0, 1). Since calculation of the midpoints requires both sums be divided by 2, we can tell the midpoints are the same if the sums are the same.

6 0
3 years ago
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