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lorasvet [3.4K]
4 years ago
11

Solve for f.-11f = 7(1 - 2f) + 5f =​

Mathematics
1 answer:
Afina-wow [57]4 years ago
5 0

Answer:

f = 4

Step-by-step explanation:

Given

- 11f = 7(1 - 2f) + 5 ← distribute and simplify right side

- 11f = 7 - 14f + 5

- 11f = 12 - 14f ( add 14f to both sides )

3f = 12 ( divide both sides by 3 )

f = 4

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The length of DE 21.26029163 units
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For the matrices below. Find all (real) eigenvalues. <br><br> A= [7 9]<br> [0 9]
Jet001 [13]

Answer:

The answer is "9 and 7".

Step-by-step explanation:

Given:

A=\left[\begin{array}{cc}7&9\\0&9\end{array}\right]

Using formula:

|A-\lambda \cdot I|= 0\\\\

\to |\left[\begin{array}{cc}7&9\\0&9\end{array}\right]-\lambda \left[\begin{array}{cc}1&0\\0&1\end{array}\right] |=0\\\\\\ \to |\left[\begin{array}{cc}7&9\\0&9\end{array}\right]- \left[\begin{array}{cc}\lambda&0\\0&\lambda\end{array}\right] |=0\\\\\\\to|\left[\begin{array}{cc}7-\lambda &9\\0&9-\lambda\end{array}\right]|=0\\\\\\\to|(7-\lambda)(9-\lambda)|=0\\\\\to (7-\lambda)(9-\lambda)=0\\\\\to 7-\lambda=0 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 9-\lambda=0\\\\

\to \lambda=7 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \lambda=9\\\\

8 0
3 years ago
This is a timed quiz. Pls, help. 50 points. 6th-grade math.
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Answer:

They did not survey customers at restaurants across Monster World.

plz mark me as brainliest.

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Read 2 more answers
1-66.
Andreas93 [3]

The Area of rectangle = 80 unit².

<h3>What is Area of rectangle?</h3>

The area can be defined as the amount of space covered by a flat surface of a particular shape. It is measured in terms of the "number of" square units (square centimeters, square inches, square feet, etc.) The area of a rectangle is the number of unit squares that can fit into a rectangle. Some examples of rectangular shapes are the flat surfaces of laptop monitors, blackboards, painting canvas, etc. You can use the formula of the area of a rectangle to find the space occupied by these objects. For example, let us consider a rectangle of length 4 inches and width 3 inches.

from figure (a)

DE= 40/8 = 5

BC= 100/5 = 20

Now,

AC= AB + BC=  8+ 20 = 28

CE= CD + DE = 10+5= 15

So, area of rectangle

= AC* CE

= 28* 15

= 420

Now, from figure (b)

CD= 24/12= 2

DE= 12/4 = 3

AC= AB+ BC= 14+ 4= 16

CE= CD + DE= 2+3 = 5

So, Area of rectangle= 16*5 = 80 unit²

Learn more about area of rectangle here:

brainly.com/question/237997

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2 years ago
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Answer:

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Step-by-step explanation:

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