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
PSYCHO15rus [73]
3 years ago
5

Prove that if b is a square matrix then b+b^t is symmetric

Mathematics
1 answer:
WARRIOR [948]3 years ago
6 0
A matrix \mathbf X is symmetric if \mathbf X=\mathbf X^\top. We have

(\mathbf B+\mathbf B^\top)^\top=\mathbf B^\top+(\mathbf B^\top)^\top=\mathbf B^\top+\mathbf B=\mathbf B+\mathbf B^\top

and so \mathbf B+\mathbf B^\top is indeed symmetric.
You might be interested in
Marco buys a certain brand of shampoo for a supplier $7.25 per bottle he sells it to his customers at a makeup 25% what would th
SCORPION-xisa [38]

Answer:

Markup= 1.81

Sale price =9.06

Step-by-step explanation:

The markup is the original prices times the markup rate

markup = 7.25 * 25%

            = 7.25 * .25

             =1.8125

We round this to the nearest cent

           =1.81

The new sale price will be the original price + the markup

7.25+1.81

9.06

3 0
3 years ago
Read 2 more answers
A box measures 6 inches by 2 inches by 3 inches. Find the volume of the box in cubic feet. Enter your answer as a fraction.
jeyben [28]
The measurements are in inches but the answer needs to be in feet, so we'll convert the numbers to feet first.

6"=1/2 ft
2"=1/6 ft
3"=1/4 ft

V=l×w×h
V=1/2*1/6*1/4
V=1/48 cubic ft

8 0
3 years ago
If h(x) = x – 7 and g(x) = x2, which expression is equivalent to(g*h)(5)? a (5 – 7)2, b (5)2 – 7, c (5)2(5 – 7), d (5 – 7)x2
asambeis [7]
H(x) = x - 7
g(x) = x^2
(g * h)(x) = x^2 (x - 7)
(g * h)(5) = 5^2 (5 - 7)
8 0
2 years ago
DOES ANYONE KNOW THE ANSWERS TO THESE PROBLEM, PLZ HELP!
Virty [35]

Answer:

Q.1.

Sum of angles of a triangle = 180°

∠A + ∠B + ∠c = 180

(3x - 9) + (4x + 15) + 90 = 180

3x - 9 + 4x + 15 + 90 = 180

7x + 96 = 180

7x = 84

x = 12

∠A = 3x - 9 = 3(12) - 9 = 36 - 9 = 27°

∠B = 4x + 15 = 4(12) + 15 = 48 + 15 = 63°

∠A = 27°

∠B = 63°

Q.2.

using \ pythagoras \ theorem \\x^2 = 7^2 + (7\sqrt{3} )^{2} = 49  + 49(3) = 196\\x = \sqrt{196}  = 14

sin y = \frac{opposite}{hypotenuse} = \frac{7\sqrt{3} }{14}   = \frac{\sqrt{3} }{2} \\\\y = sin^{-1} (\frac{\sqrt{3} }{2} ) = 60

x = 14

y = 60°

8 0
2 years ago
What is 3/5+3/8 in simplest form
schepotkina [342]
The answer would be 39/40.

1. Find the LCD of both of the fractions (LCD = 40)

2. Make the denominators the same as LCD (The LCD would be 40)

3. Simplify (24/40 + 15/40)

4. Join the denominators
(24 + 15/40)

5. Simplify (39/40)

In decimal form its 0.975.
5 0
3 years ago
Other questions:
  • PLEASE HELP! Christy rolls a number cube and then chooses a card from a set numbered 1 through 9. What is the probability that s
    10·1 answer
  • The table represent the function f(x) if g(x) =4x -8 which statement is true see picture please thank you inadvance
    15·1 answer
  • Mr.varela bought a block of fudge that weighed 3/4 of a pound. He cut the fudge into 2 equal pieces. What was the weight of each
    8·1 answer
  • Which is the approximate solution to the system y = 0.5x + 3.5 and y = −A system of equations. y equals 0.5 x plus 3.5. y equals
    5·2 answers
  • Estimate the perimeter of the figure to the nearest whole number. PLZ SOLVE PLZ
    6·2 answers
  • Can someone please HELP ME
    10·1 answer
  • owl monkey sleep during the day waking about 15minutes after sundown to find food.At midnight,they rest for an hour or two,then
    10·2 answers
  • Amy baked 114 brownies for a bake sale. She sold bags of brownies with
    12·1 answer
  • Write in factored form:
    8·1 answer
  • jamie and emily are married and make a total annual gross pay of 91,500. Use the table below to calculate their total and federa
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!