1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marina86 [1]
2 years ago
13

What is the inverse of

Mathematics
1 answer:
Paladinen [302]2 years ago
4 0

Answer:

A^{-1} = \frac{1}{66} \left[\begin{array}{cc}-2&-5\\6&-18\end{array}\right]

Step-by-step explanation:

Given

A = \left[\begin{array}{cc}-18&5\\-6&-2\end{array}\right]

Required

Determine the inverse

A matric is of the form:

A = \left[\begin{array}{cc}a&b\\c&d\end{array}\right]

First, we need to calculate the determinant (D)

D = a * d - b * c

By comparison, we have:

D = (-18 * -2) - (5 * -6)

D = (36) - (-30)

D = 36 +30

D = 66

The inverse is then represented as:

A^{-1} = \frac{1}{D} \left[\begin{array}{cc}d&-b\\-c&a\end{array}\right]

This gives:

A^{-1} = \frac{1}{66} \left[\begin{array}{cc}-2&-5\\6&-18\end{array}\right]

You might be interested in
7 + 2y^2<br><br> Evaluate the expression for <br> Y = 5.<br><br><br> Please help me
garik1379 [7]

Answer:

107

Step-by-step explanation:

We first need to input the values of the variables.

7 + 2 x 5^2

7+10^2

7+100 = 107

4 0
2 years ago
4x+1 ,3x find the value of x
In-s [12.5K]
I'm assuming that you meant 4x+1=3x?

Subtracting 4x, we get 1=-x.  Multiplying by -1, we get x=-1 as the solution.
6 0
3 years ago
Read 2 more answers
A baker uses 1,232 ounces of flour daily. The baker's recipe for a loaf of bread calls for 12 ounces of flour. How many full loa
VashaNatasha [74]

Answer:

102 loafs of bread

Step-by-step explanation:

1232 ÷ 12 = 102.6666666666

102 is the answer

5 0
3 years ago
Read 2 more answers
1.) At a restaurant, your bill has a food total of $33.50. Find the amount of a 16% tip on the food total.
lukranit [14]
$5.36 hope this helps
8 0
2 years ago
1. (5x2-2x+3) + (x2+x+2)
antiseptic1488 [7]
The answer is: x^2-x+15
3 0
2 years ago
Other questions:
  • Maria spent $18 to purchase 24 identical mechanical pencils. What is the cost for one mechanical pencil?
    14·2 answers
  • The volume of sphere is 2254 pi m cubed. what is the surface area to nearest tenth?
    14·1 answer
  • Estimate Width of a room in cm, m, or km
    12·1 answer
  • URGENT! WILL GIVE BRAINLIEST!!! IF CORRECT!
    7·2 answers
  • What can u find out from the bar chart that you cannot find on the pie chart
    13·1 answer
  • Can someone answer this question please
    15·2 answers
  • Simplify the radical expression. √10b^4c^4 X 3√33b^3.
    9·1 answer
  • How do I find the difference in the simplest form?
    12·1 answer
  • Ashton was born on the second Saturday in August many years ago. In that August, there were five Mondays and four Tuesdays. On w
    6·1 answer
  • Please help with photo below
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!