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
DochEvi [55]
3 years ago
12

(b) Given that

Mathematics
1 answer:
Gnesinka [82]3 years ago
4 0

Answer:n=-2 or n=4

Step-by-step explanation:

Q is not inversible if det(Q)=0

\left|\begin{array}{ccc}6&7&-1\\3&n&5\\9&11&n\end{array}\right| =0\\\\\\\\6(n^2-55)-3(7n+11)+9(35+n)=0\\\\n^2-2n-8=0\\\\\Delta=36=6^2\\\\n=\dfrac{2-6}{2} =-2\ or\  n=\dfrac{2+6}{2}=4\\

You might be interested in
I need help on number 6 please
Gennadij [26K]

Answer:

The full answer is in the media.Good luck!

3 0
3 years ago
A court reporter is paid for her work by the hour. If she makes $75 for 5 hours of work, how much will she be paid for working 1
elena-s [515]

Answer:

Step-by-step explanation:

180 dollars is her pay because you divide 75 by 5 get 15 and multiply that by 12

3 0
3 years ago
15PTS PLEASE HELP ASAP!<br> (dont write random answers pls)
Goryan [66]

Answer:

kkkkkkkk

Step-by-step explanation:

4 0
3 years ago
Which of the following sets are continuous? Please help
Alecsey [184]

Answer:

A, C and D are continuous

Step-by-step explanation:

A is a set of any number x which 30 < x <=45

B is a set that contains only 3 and 7

C is a set of any number x which 60 <= x < 100

D is a set of any number x which -infinity < x < + infinity

E is a set that contains only even whole numbers

A continuous data set is a quantitative data set representing a scale of measurement that can consist of numbers other than whole number, like decimals and fractions.

7 0
3 years ago
Find the value of x. If​ necessary, write your answer in the simplest radical form.
Paul [167]

Answer:

x = 4\sqrt{5}

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 1² = 9²

x² + 1 = 81 ( subtract 1 from both sides )

x² = 80 ( take square root of both sides )

x = \sqrt{80} = \sqrt{16(5)} = \sqrt{16} × \sqrt{5} = 4\sqrt{5}

3 0
2 years ago
Read 2 more answers
Other questions:
  • The first pentagon is dilated to form the second pentagon. Drag and drop the answer to correctly complete the statement. IT IS 2
    13·2 answers
  • The observatory in the John Hancock Center in Chicago is located in the top floor, 900 feet above the ground. The express elevat
    14·1 answer
  • A class of 30 swim team members took a lifesaving test. Eighteen of the members had an average score of 92 points. The remaining
    10·2 answers
  • Can someone help me on the steps for this?
    7·1 answer
  • Can someone do this for me
    15·1 answer
  • Write an equation of the line that passes through (18, 2) and is parallel to the line 3y - x = -12.
    12·1 answer
  • you have $15,000 to invest in a bank account. Capital one bank pays 5% compounded quarterly, and bank of America pays 4.5% compo
    15·1 answer
  • Please help with this problem
    10·1 answer
  • Pre college need withh
    13·1 answer
  • if a runner finishes the 26.2. mille race in 4 hours and 37 mins and Wilson kipping finish in 4 minutes and 43 seconds per mile
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!