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Zepler [3.9K]
3 years ago
5

Solve -0.4k - 6 = 1.2. Explain your answer.

Mathematics
2 answers:
il63 [147K]3 years ago
6 0
The value of K is -18

Deffense [45]3 years ago
5 0

Answer:

k = -18

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

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Find an invertible matrix P and a matrix C of the form such that the matrix A has the form A. The eigenvalues of A are and with
Drupady [299]

Answer:

Hello your question is incomplete attached below is the correct question

and the solution

answer: A

Step-by-step explanation:

attached below is a detailed solution of the given problem

There exists P and C such that ( ∵ λ1 ≠ λ21 so A is diagonalizable )

5 0
3 years ago
Solve the system by substitution.<br> -2x + 7y = 15<br> бу = 3
Salsk061 [2.6K]

Answer:

Step-by-step explanation:

-2x + 7(1/2) =15

-4x +7 =30

-4x =23

x=-23/4

6 0
3 years ago
A lighthouse operator sights a sailboat at an angle of depression of 12 degrees. If the sailboat is 80m away, how tall is the li
mart [117]
Check out the attached image for the drawing of how this would look. The drawing isn't 100% needed but it helps I think. 

Based on the figure shown in the attachment, we have a right triangle with the adjacent leg of 80 (this leg is closest to the bottom 12 degree angle) and an opposite leg of h

In short,
adjacent = 80
opposite = h

We'll use the tangent rule
tan(angle) = opposite/adjacent
tan(12) = h/80
80*tan(12) = h
h = 80*tan(12)
h = 17.0045249336018  <<-- see note below

So the lighthouse is roughly 17.0045249336018 meters tall

Answer: 17.0045249336018

Note: Make sure you are in degree mode. The value is approximate. Round this answer however you need to

4 0
3 years ago
Help me please this is due in 30 mins!
snow_tiger [21]

Answer:

17 feet

Step-by-step explanation:

Since a square has 4 sides, you have to do 68 / 4 to find one of the sides.

68/4 = 17

And to check, if you add up all sides...

17+17+17+17 = 68

8 0
2 years ago
A circle has a diameter with endpoints of (-3, 8) and (7, 4). What is the center of the circle?
Alexeev081 [22]
The center of the circle is expressed as (h,k) in the standard form  of equation. In this case, the diameter endpoints are <span>(-3, 8) and (7, 4). Hence the circle center has coordinates which are the midpoints of the two points. 

x = (-3 + 7) /2  = 2
y = (8 + 4) /2 = 6 

hence the center of the circle is (2,6)</span>
5 0
3 years ago
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