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avanturin [10]
4 years ago
8

Which of the following represents the inverse of the matrix below?

Mathematics
1 answer:
Bezzdna [24]4 years ago
6 0
To find an inverse matrix you first have to find the determinant and then put the absolute value of it under a 1.  That's what is sitting outside in front of all those matrices.  What you have to do now is multiply that determinant by what I teach to my students as the "mixed up matrix".  They always remember from that.  Change the position of the terms on the major axis (here they are a and d), and then switch the signs on the other 2 terms.  Our inverse matrix then is A^{-1} =\frac{1}{IAI}   \left[\begin{array}{ccc}d&-b\\-c&a\\\end{array}\right]
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Your car gets about 20 miles per gallon. You are planning to drive to
igor_vitrenko [27]

Answer:

42.5 or 43

Step-by-step explanation:

Since you need to travel 850 miles, and you can travel 20 miles per gallon, you should divide 850 by 20 to get the number of gas cans needed. In doing so, you get 42.5 gas cans, but since it may be asking for whole cans rather than part of a gas can, you might want to write 43 instead. If you were to round down to 42, you would not have enough gas to finish the trip, so you should round up to 43. So, it is up to you if you want to write 42.5 or 43.

Hope this helped somewhat! ;(

5 0
2 years ago
The area of a regular hexagon is 14.96 cm2. What is the perimeter of the hexagon? A. 1.2 space c m B. 1.2 square root of 3 space
victus00 [196]

Answer:

14.4 cm

Step-by-step explanation:

The formula for the area of a regular hexagon in terms of its side length s is ...

... A = (3√3)/2·s²

Then the side length is ...

... s = √(2A/(3√3))

and the perimeter is ...

... P = 6s = √(8A√3)

For your area, this is ...

... P = √(8·14.96·√3) ≈ √207.292 ≈ 14.4 . . . . cm

7 0
3 years ago
Read 2 more answers
A washer and a dryer cost $862
Svetlanka [38]

The cost of dryer is $450 and the cost of washer is $412

4 0
3 years ago
Aaron bought a bagel and 3 muffins for $7.25. Bea bought a bagel and 2 muffins for $6. How much is a bagel and how much is a muf
Valentin [98]
The muffin is 1.25
The bagel is 3.50
You get this by seeing the first person bought 3 muffins and 1 bagel.
The second vought only 1 muffin less, so subtract the 2 totals and that gives you the difference which is the price of the muffin
3 0
4 years ago
Question 2 Multiple Choice Worth 1 points)
likoan [24]

Answer:

Solution: means we replace 'x' with 'x+1' and we get g (x). Let us put x = 0 and then y = 0 to find two points on coordinate axis to easily plot the graph of g (x). Now, let us put y = 0 and find out x. So, second point is . Now, let us plot A and B then extend the line joining AB.

4 0
3 years ago
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