I REALLY NEED HELP THIS IS DUE TODAY AND IT'S 1:57 PLEASE HELP!!!!
-6 X ?= -18
-2 x ? = 20
-? x -10=-70
-7 x ?= -28
-? x -7= 49
-3 x ? =21

Answer: C. [tex]B=\left[\begin{array}{ccc}1\\3\\-5\end{array}\right][/tex]

Step-by-step explanation: I got this right on Edmentum.

Several operations such as addition, subtraction, multiplication, etc. can be performed on matrices. The value of matrix B is:

[tex]B =\left[\begin{array}{c}1&3&-5\end{array}\right][/tex]

Given that:

[tex]A =\left[\begin{array}{ccc}2&4&-2\\4&-5&7\\2&7&5\end{array}\right][/tex]

[tex]AB =\left[\begin{array}{c}24&-46&-2\end{array}\right][/tex]

Let matrix B be:

[tex]B =\left[\begin{array}{c}a&b&c\end{array}\right][/tex]

The product of A and B is as follows:

[tex]\left[\begin{array}{ccc}2&4&-2\\4&-5&7\\2&7&5\end{array}\right] \times\left[\begin{array}{c}a&b&c\end{array}\right][/tex]

Multiply the rows of A to the column of B. So, we have:

[tex]AB =\left[\begin{array}{ccc}2a+4b-2c\\4a-5b+7c\\2a+7b+5c\end{array}\right][/tex]

This means that:

[tex]\left[\begin{array}{ccc}2a+4b-2c\\4a-5b+7c\\2a+7b+5c\end{array}\right] = \left[\begin{array}{c}24&-46&-2\end{array}\right][/tex]

By comparison, we have:

[tex]2a + 4b - 2c = 24[/tex] --- (1)

[tex]4a - 5b + 7c = -46[/tex] --- (2)

[tex]2a + 7b + 5c = -2[/tex] --- (3)

Multiply (1) and (3) by 2

[tex]2a + 4b - 2c = 24[/tex] --- (1)

[tex]4a + 8b - 4c = 48[/tex] ----- (5)

[tex]2a + 7b + 5c = -2[/tex] --- (3)

[tex]4a + 14b + 10c = -4[/tex] ---- (6)

So, we have:

[tex]4a - 5b + 7c = -46[/tex] --- (2)

[tex]4a + 8b - 4c = 48[/tex] ----- (5)

[tex]4a + 14b + 10c = -4[/tex] ---- (6)

Make 4a the subject in each of the equations

[tex]4a = -46 + 5b - 7c[/tex]

[tex]4a = 48 - 8b + 4c[/tex]

[tex]4a = -4 - 14b - 10c[/tex]

[tex]4a = 4a[/tex]. So, we have:

[tex]-46 + 5b - 7c = 48 - 8b + 4c[/tex]  and  [tex]-46 + 5b - 7c = -4 - 14b - 10c[/tex]

Simplify both expressions

[tex]-46 + 5b - 7c = 48 - 8b + 4c[/tex]

[tex]5b + 8b - 7c - 4c = 48 + 46[/tex]

[tex]13b - 11c = 94[/tex]

[tex]-46 + 5b - 7c = -4 - 14b - 10c[/tex]

[tex]5b+14b - 7c + 10c = 46-4[/tex]

[tex]19b + 3c = 42[/tex]

Make c the subject

[tex]c = \frac{42 -19b}{3}[/tex]

Substitute [tex]c = \frac{42 -19b}{3}[/tex] in [tex]13b - 11c = 94[/tex]

[tex]13b - 11 \times (\frac{42 - 19b}{3}) = 94[/tex]

Multiply through by 3

[tex]39b - 11 \times (42 - 19b) = 282[/tex]

Open bracket

[tex]39b - 462 + 209b = 282[/tex]

Collect like terms

[tex]39b + 209b = 282+462[/tex]

[tex]248b = 744[/tex]

Solve for b

[tex]b = \frac{744}{248}[/tex]

[tex]b = 3[/tex]

Solve for c

[tex]c = \frac{42 -19b}{3}[/tex]

[tex]c = \frac{42 - 19 \times 3}{3}[/tex]

[tex]c = \frac{-15}{3}[/tex]

[tex]c = -5[/tex]

Solve for a in [tex]4a = -4 - 14b - 10c[/tex]

[tex]4a = -4 - 14 \times 3 - 10 \times -5[/tex]

[tex]4a = 4[/tex]

Divide by 4

[tex]a = 1[/tex]

Recall that matrix B is:

[tex]B =\left[\begin{array}{c}a&b&c\end{array}\right][/tex]

Hence, the value of matrix B is:

[tex]B =\left[\begin{array}{c}1&3&-5\end{array}\right][/tex]

Read more on matrix operations at:

https://brainly.com/question/16956653

Answer:

c. 186 any more help just ask :)

Answer:

D

Step-by-step explanation:

I just took the quiz

Answer:

Net pay of Kevin is $440

Step-by-step explanation:

Pay per hour = $6.50

Total Hours worked= 60 hours

Total pay for 60 hours worked = 6.50 x 60 = $390

Amount received as tips = $148

Now, his pay would be: 390+148 = $538

Amount deducted for meals = $21

Now his pay would be = 538-21 = $517

Now, Pay of Kevin is $517

Payroll taxes deducted from pay = $77

Net pay of Kevin= 517-77 = &440

Answer:

The length is 15 inches.

Step-by-step explanation:

Perimeter of rectangle = 2L + 2W

If W = 6, then 2W = 2*6, which is 12.

Now, 2L + 12 = 42.

Solve for L.

2L + 12 = 42

2L = 30

L = 15

Answer:

Put a shaded dot in 9 and an arrow pointing left

Step-by-step explanation:

Answer:

1 and 1/2

Step-by-step explanation:

Answer: It should be 6/4 if you simplify it well be 3/2 but it is an improper fraction and should be written as 1 1/2.

Step-by-step explanation:

Answer:

1/4

Step-by-step explanation:

First, reduce the numbers with the greatest common factor of 2.

Then, you get your answer of 1/4.

Answer:

9/10 in simpliest form is 9/10

Step-by-step explanation:

In order to simplify a fraction there must be:

1. A number that will divide evenly into both the numerator and denominator so it can be reduced. No such number exists for 9 and 10.

or

2. The numerator must be greater than the denominator, (an improper fraction), so it can be converted to a mixed number. 9 is not greater than 10.

9/10 as a decimal: 0.9

9/10 as a percent: 90%

Answer:

first is 3, then 8, then it's 2

Answer:

1. a = 3

2. a = 8

3. c = 2

Step-by-step explanation:

7a x 8 = 168

7 + 2a = 23

6c + 8c = 28

Answer:

the equation=y

Step-by-step explanation:

Answer:

6^2 + 6^2 = hypotenuse^2

hypotenuse^2 = 72

hypotenuse = sqr root (72)

Step-by-step explanation:

Answer:

each section will be .7 inches long

Step-by-step explanation:

8.4/ 12

Answer:

I see what's happening here

You're face to face with greatness

And it's strange

You don't even know how you feel

It's adorable

It's nice to see that humans never change

Open your eyes, let's begin

Yes it's really me, breathe it in

I know it's a lot, the hair, the bod

When you're staring at a demigod

So what can I say except

You're welcome

For the tide, the sun, the sky

Hey, it's okay, it's okay

You're welcome

I'm just an ordinary demiguy

What can I say except

You're welcome

For the tide, the sun, the sky

Hey, it's okay, it's okay

You're welcome

I'm just an ordinary demiguy

Honestly, I can go on and on

I could explain every natural phenomenon

The tide, the grass, the ground

Oh, that was me I was messing around

I killed a snake, I buried its guts

Sprouted a tree, now you've got coconuts

What's the lesson?

What is the takeaway?

Don't mess with Maui when he's on a breakaway

And the tapestry here in my skin

Is a map of the victories I win

Look where I've been, I make everything happen

Look at that mean mini Maui just tikkity tappin'

Singing and scratchin'

Flipping and snappin'

People are clappin', hearing me rappin'

And bring the chorus back in

Well anyway, let me say you're welcome

For the wonderful world you know

Hey, it's okay, it's okay

You're welcome

Well, come to think of it, I gotta go

Hey, it's your day to say

You're welcome

'Cause I'm gonna need that boat

I'm sailing away, away

You're welcome

'Cause Maui's the ultimate guy

You're welcome!

You're welcome!

Step-by-step explanation:

Answer:

y = -3x + 2

Step-by-step explanation:

Ok so I assumed that you are setting this equal to 0 or there would be an equal sign in the equation.  So basically you just want to gather like terms on each side so the y's on the left and the x's on the right.  You then want to solve using algebra and you have your answer!  I will add a picture to show my steps.

Answer:

No

Step-by-step explanation:

Because 84/96 = 7/8 and 56/63= 8/9

Answer:

Step-by-step explanation:

Step one:

given data

initial count of fish= 850

final count of fish= 500

Required

% decrease

Step two:

% decrease= final-initial/initial*100

substitute

% decrease= 850-500/850*100

% decrease=350/850*100

% decrease= 0.41*100

% decrease= 40.1%

The percent decrease is approximately 40%.

Answer:

The percent decrease is approximately 70%

Answer: Events A and B are independent.

=============================================

Explanation:

Note how,

P(A)*P(B) = 0.5*0.2 = 0.1

which matches exactly with P(A and B) = 0.1

Therefore,

P(A and B) = P(A)*P(B)

is a true statement. This further leads to events A and B being independent.

Answer:

c.

Step-by-step explanation:

i think at least i just used the calculator

Answer: f(x)= log1/x, x≠0

Step-by-step explanation: trust

The functional model is a logical description of the functionalities (activities, events, procedures, and procedures) of the simulation model or content matter.

As per the given question, below is a list of values provided by a science teacher.

What function is responsible again for tables representing data that are

The chart with x and f(x) has been provided below.

The table shows that if [tex]x = \frac{1}{10}[/tex]  then [tex]f(x) =1[/tex]

Using the logarithm rule that is:

[tex]\log (10) = 1 \\\\\log (100) = 2.[/tex]

Substituting the values of x in [tex]f(x)= \log \frac{1}{x}[/tex]

When

[tex]x = \frac{1}{10}\\\\f(x)= \log \frac{1}{\frac{1}{10}}[/tex]

We can write it [tex]f(x) = \log(10) = 1[/tex]

If

[tex]x = \frac{1}{100}\\\\f(x)= \log \frac{1}{\frac{1}{100}}[/tex]

We can write it [tex]f(x) = \log(100) = 2[/tex]

Therefore, the final answer is "[tex]f(x)= \log \frac{1}{x} , x =/ 0[/tex]".

Find out more about the function models here:

brainly.com/question/11989600

Answer:

1/3

Step-by-step explanation:

y=mx+b

m= Slope

So, 1/3 is the slope.

Answer:

m^8

Step-by-step explanation:

The number of tiles on the wall is m^(8)

What is Algebraic expression ?

Algebraic expressions are the idea of expressing numbers using letters or alphabets without specifying their actual values. The basics of algebra taught us how to express an unknown value using letters such as x, y, z, etc. These letters are called here as variables. An algebraic expression can be a combination of both variables and constants. Any value that is placed before and multiplied by a variable is a coefficient.

Here, it is given that :

number of rows = m³

number of columns = m^(5)

Now, we have to find the number of tiles in a wall

= rows *  column

=  m³ *  m^(5)

= m^(3+5)

= m^(8)

hence, the number of tiles in a wall is m^(8)

Learn more about algebra here:

brainly.com/question/13715639

#SPJ1

Answer:

Step-by-step explanation:

Prime factorization: 43 is prime. The exponent of prime number 43 is 1. Adding 1 to that exponent we get (1 + 1) = 2. Therefore 43 has exactly 2 factors.

Answer:

Area of carpet = 177.625 ft²

Step-by-step explanation:

Given:

Length of room = [tex]14\frac{1}{2}[/tex] = 14.5 ft

Width of room = [tex]12\frac{1}{4}[/tex] = 12.25 ft

Find:

Area of carpet

Computation:

Area of carpet = lb

Area of carpet = (14.5)(12.25)

Area of carpet = 177.625 ft²

Micheal estimation = 15.5 x 12.25 = 189.875

Tracy estimation = 12.25 x 15.5 = 189.875

Both wrong.