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Yakvenalex [24]
3 years ago
14

3 more to go ;-; please help

Mathematics
2 answers:
Nostrana [21]3 years ago
7 0
A. Right and E. Scalene
alexgriva [62]3 years ago
6 0

Answer:

hii there

The correct answer is option ( A )

Step-by-step explanation:

Hope it helps

have a nice day :)

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Determine which of the indicated column vectors are eigenvectors of the given matrix
gladu [14]
]Eigenvectors are found by the equation (A-\lambda I) \vec{v} = 0$ implying that \det(A-\lambda I) = 0. We then can write:

A-\lambda I = \left [ \begin{array}{cc} 4-\lambda & 2 \\ 5 & 1-\lambda \end{array}\right ] 

And:

\det(A-\lambda I) = (4-\lambda)(1-\lambda) - 10 = 0 

Gives us the characteristic polynomial:

\lambda^2 - 5 \lambda -6 = 0 \implies \lambda_1 = -1, \lambda_2 = 6

So, solving for each eigenvector subspace:

\left [ \begin{array}{cc} 4 & 2 \\ 5 & 1 \end{array} \right ] \left [ \begin{array}{c} x \\ y \end{array} \right ] = \left [ \begin{array}{c} -x \\ -y \end{array} \right ]

Gives us the system of equations:

4x + 2y = -x \newline 5x + y = - y 

Producing the subspace along the line y = -\frac{5}{2} x

We can see then that 3 is the answer. 



7 0
3 years ago
PLEASE HELP ME BRAINLIEST WILL BE GIVEN!!
hjlf

Answer:

False

Step-by-step explanation:

The people arent random

3 0
3 years ago
Solve/ Find x<br><br><br><br><br> -3(x+7)+2(x-2)
butalik [34]

Answer:

Step-by-step explanation:

-3x - 21 + 2x -4

-x - 25

-(x + 25)

7 0
3 years ago
1. A ball's position, in meters, as it travels every second is represented by the position function s(t) = 4.9t2+ 450.
bezimeni [28]
1) The ball's position is described by:
s(t) = 4.9t² + 450
We want to find the velocity, which is the 1st-order derivative of the displacement function (I assume this is an introductory calculus class)
s'(t) = v(t) = 9.8t           
We get this by multiplying 4.9 x 2 and reducing the exponent by 1. Now we simply plug 5 in for t.
v(5) = 9.8* 5
v(5) = 49m/s

2) Our cost function is C(x) = x² - 10,000
To find the average rate of change between these units, we use this formula:
( C(101) - C(100) ) ÷1 .
We find the change in C, and divide by the change in x, which is just one. 
C(101) = 101² - 10,000
C(101) = 201

C(100) = 100² - 10,000
C(100= 0

C(101) - C(100) = 201 
Average rate of change in cost is 201 dollars/ unit between the two points. 
7 0
3 years ago
Brandon uses the steps below to solve the equation 15 x + 6 = 14 x + 5 using algebra tiles.
iris [78.8K]
Brandon is not correct because he should have added 6 negative unit tiles to isolate the variable in step 2—— the answer would have been x=-1
7 0
3 years ago
Read 2 more answers
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