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
sveticcg [70]
3 years ago
14

Evaluate the determinant for the following matrix: 1 4 4 5 2 2 1 5 5

Mathematics
1 answer:
Elina [12.6K]3 years ago
7 0
A Laplace expansion along the first row gives

\begin{vmatrix}1&4&4\\5&2&1\\1&5&5\end{vmatrix}=1\begin{vmatrix}2&1\\5&5\end{vmatrix}-4\begin{vmatrix}5&1\\1&5\end{vmatrix}+4\begin{vmatrix}5&2\\1&5\end{vmatrix}
=1(10-5)-4(25-1)+4(25-2)
=1
You might be interested in
What is the skipping sequence of 90,92,__,__,99,__
DaniilM [7]

that is not possible cause the first 2 indicate that the pattern is counting by 2s


5 0
3 years ago
If the 9-inch wheel of cheese costs $18.60, what is the cost per square inch? If the cost is less than a dollar, put a zero to t
vagabundo [1.1K]

Find the area of the wheel:

Area of a circle is found using the formula:

Area = PI x r^2

9 inch would be the diameter, so the radius would be 9/2 = 4.5 inches.

The area would be 3.14 x 4.5^2 = 63.6 square inches.

Now divide the price by the area to get price per square inch:

Cost per square inch = 18.60 / 63.6 = $0.29 (rounded to the nearest cent)

5 0
3 years ago
Read 2 more answers
Complete the square x^2+45=-14x
Rom4ik [11]

2
+
4
5
=
−
1
4

x
2
+
45
=
−
14
x
x2+45=−14x

2
+
4
5
−
−
1
4

=
0
8 0
3 years ago
10) BRAINLIEST & 10+ POINTS!
Nadya [2.5K]

Answer:

Complementary angles are angles that add up to 90°

To find the complementary angle for an angle of 70° subtract it from 90°

That's

90° - 70° = 20

Hope this helps

3 0
3 years ago
Read 2 more answers
Please help first person to answer correctly with no links get 50 points and marked as brainliest no links please
icang [17]

Answer:

C, first I'm not sure if it's correct, but hear me out.

Step-by-step explanation:

If we already know that B=34 we need to find out the rest.

B=50 (Estimated)

D=45 (Estimated)

34+50+45

34+50=84+45=129, 129 estimated=130, and since their is no answer choice but C it should be C, I could be very wrong though.

7 0
2 years ago
Other questions:
  • Simplify the expression 5^3•5^-5
    6·2 answers
  • Beyonce is solving a system of equations:
    11·1 answer
  • Find an equation of the line passing through the point (6,2) and perpendicular to −2x−1y=−3
    10·1 answer
  • Solve for the perimeter and area of a rectangle that has a length of 4in. and a width of 2 in
    12·2 answers
  • If quadrilateral ABCD is translated 3 units to the left and 5 units down, what are the coordinates of point B after the translat
    8·1 answer
  • I need help ASAP I’ll mark brainliest help please #1
    12·1 answer
  • If no grouping symbols or exponents are in an expression, then do
    14·2 answers
  • There are four cities A, B, C and D in Wonderland. You can get from city A to city B by 6 highways, and from city B to city C by
    5·2 answers
  • Solve the equation on the interval
    8·1 answer
  • WHO EVEN ANSWERS FIRST WILL BE MARKED BRAINLIEST
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!