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
Anna [14]
3 years ago
6

Yo can someone help me out

Mathematics
2 answers:
amid [387]3 years ago
8 0

Answer:

x = 21

Step-by-step explanation:

corresponding sides in similar polygons are proportional:

set a proportion: BC/FK = CA/KJ => 18/6 = x/7 => x = 18 × 7 ÷ 6 = 21

weqwewe [10]3 years ago
4 0
X=21 I think maybe yeah
You might be interested in
Express the system as AX = B; then solve using matrix inverses
Wittaler [7]

Answer with explanation:

1. The given equations are

3x -5 y=2

-x+2 y= 0

⇒The matrix in the form of , AX=B, is

A=\left[\begin{array}{cc}3&-5\\-1&2\end{array}\right] ,\\\\ X=\left[\begin{array}{c}x&y\end{array}\right],\\\\B=\left[\begin{array}{c}2&0\end{array}\right]

\rightarrow X=A^{-1}B\\\\\rightarrow X=\frac{Adj.A}{|A|}\times B

Adj.A=Transpose of cofactor of Matrix A

Adj.A=\left[\begin{array}{cc}2&1\\5&3\end{array}\right] ,\\\\ |A|=6-5\\\\|A|=1\\\\\left[\begin{array}{c}x&y\end{array}\right]=\left[\begin{array}{cc}2&5\\1&3\end{array}\right] \times \left[\begin{array}{c}2&0\end{array}\right]\\\\x=4, y=2

2.

The given equations are

x+y-z=2

x+z=7

2 x +y+z=13

⇒The matrix in the form of , AX=B, is

   A=\left[\begin{array}{ccc}1&1&-1\\1&0&1\\2&1&1\end{array}\right]\\\\ X=\left[\begin{array}{ccc}x\\y\\z\end{array}\right]\\\\B= \left[\begin{array}{ccc}2\\7\\13\end{array}\right]\\\\\rightarrow X=A^{-1}B\\\\\rightarrow X=\frac{Adj.A}{|A|}\times B\\\\a_{11}=-1,a_{12}=1,a_{13}=1,a_{21}=-2,a_{22}=3,a_{23}=1,a_{31}=1,a_{32}=-2,a_{33}=-1\\\\|A|=1\times(0-1)-1\times(1-2)-1\times(1-0)\\\\=-1+1-1\\\\|A|=-1\\\\Adj.A=\left[\begin{array}{ccc}-1&-2&1\\1&3&-2\\1&1&-1\end{array}\right]

\frac{Adj.A}{|A|}=\left[\begin{array}{ccc}1&2&-1\\-1&-3&2\\-1&-1&1\end{array}\right]\\\\X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}1&2&-1\\-1&-3&2\\-1&-1&1\end{array}\right]\times\left[\begin{array}{ccc}2\\7\\13\end{array}\right]\\\\x=3,y=3,z=4

7 0
3 years ago
1 Bradley is building a table
Harman [31]

Answer:

Step-by-step explanation: < 180

3 0
3 years ago
Can someone put true or false? Please make sure you answer is correct and label them like this:
uysha [10]
1. true.
2. false.
3. false.
4. true.

these should be correct.
4 0
3 years ago
Its a number answer...plz help me!​
gregori [183]

Answer:

tge answer is 36 mintutes. can i be brainelest?

Step-by-step explanation:

3 0
3 years ago
A circular rug has a diameter of 6 feet. What is the circumference of the rug? Use 3.14 for π.
Anton [14]

Answer:

your answer is b. 18.84ft

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • P(x)=x^6-11x^5+30x^4 find the zeros
    14·1 answer
  • A large research hospital is considering a new computer-based training course for lab safety. The total cost of the hospital's c
    13·2 answers
  • You want to help build an awards podium for a track meet. If the podium has the dimensions shown, what is its volume?
    13·2 answers
  • Which price choice is the lowest price per ounce? HELP! I HAVE 2 HRS TO GET CORRECT ANSWER!
    10·1 answer
  • Write the word sentence as an equation. Then solve. Number 5.) 6.) 7.) and 8.)
    7·1 answer
  • Which is greater 2.48 or 2.83
    15·2 answers
  • four red boxes and two black boxes cost $40. Five red boxes cost $20. All red boxes cost the same. All black boxes cost the same
    7·1 answer
  • Given g(x)=Squareroot x-4 and h(x)=2x-8, what is g(h(10))
    10·2 answers
  • Find the area of a regular octagon with an apothem of 8.45 cm and a side length of 7 cm. (round to the nearest whole number) A)
    8·1 answer
  • CAN SOMEONE PLEASE HELP ME
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!