Please can I have help with these questions

9514 1404 393

Answer:

  A.  -3

Step-by-step explanation:

The reduced row echelon form* of ...

  [tex]\left[\begin{array}{ccc|c}4&5&-6&2\\-3&-2&7&-15\\-1&4&2&-13\end{array}\right][/tex]

is ...

  [tex]\left[\begin{array}{ccc|c}1&0&0&-3\\0&1&0&-2\\0&0&1&-4\end{array}\right][/tex]

which tells you the value of 'a' is -3.

_____

* Many scientific and/or graphing calculators and web sites can find the reduced row echelon form of a matrix for you. Or, for a single variable (such as 'a'), you can use Cramer's rule. That requires you compute two 3×3 matrix determinants. Again, there are many calculators, apps, and web sites that will make this calculation for you.

  [tex]a=\dfrac{\left|\begin{array}{ccc}2&5&-6\\-15&-2&7\\-13&4&2\end{array}\right| }{\left|\begin{array}{ccc}4&5&-6\\-3&-2&7\\-1&4&2\end{array}\right|}=\dfrac{147}{-49}=-3[/tex]

Answer:

sorry theres not enough information to tell.

Step-by-step explanation:

:(

The Refernce angle is 13

Step-by-step explanation:

For example imange a coordinate plane lets say we want to draw an angle thats 144° We start on the right side of the x-axis, where three o’clock is on a clock. We rotate counterclockwise, which starts by moving up. We keep going past the 90° point (the top part of the y-axis) until we get to 144°. hope this helps!

Answer:

0.3024

Step-by-step explanation:

Given the following :

Probability of breaking pinata on first hit = 0.58;

P(first hit break) = 0.58

P(does not break on first hit) = 1 - p(first hit break) = 1 - 0.58 = 0.42

P(2nd hit break) = p(first hit break) + 0.14 = 0.58 + 0.14 = 0.72

Hence, Calculate the probability that Amanda does not break the piñata on the first hit and does break the piñata on the second hit

P(does not break on first hit) * p(2nd hit break)

0.42 * 0.72 = 0.3024

Answer:

Easy to solve.

X=7

Step-by-step explanation:

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

Answer:

it is 41 because you would divide 164 by 4 and get 41

The area which will cover the 164 feet of fencing in form of a square is 1681 square feet.

The quantity of space enclosing a three-dimensional shape's exterior is its surface area.

If we say side square then it is an area of the square but for a cuboid, there are 6 faces so the surface area will be external to all 6 surfaces area.

Length of fencing = 164 feet

Let's suppose this fencing is covered outside of a square with side "a".

The perimeter of the square = 4a

4a = 164

a = 41

Now the area of the square is a².

Therefore,41² = 1681 square feet.

Hence "The area which will cover the 164 feet of fencing in form of a square is 1681 square feet".

To learn more about surface area,

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#SPJ5

The two numbers on the dot plot that will have the same number of dots would be: B. 8.0 and 8.2.

A dot plot can be described as a simple form of data visualization that shows the frequency at which each data points in the data set occurs, which are plotted as dots.

The data set of the measures of the fossils taken by the paleontologist include the following data points and the frequency at which they occur and how they are represented on a dot plot:

We are told that the paleontologist found two errors, where a length of two fossils that measure 7.9 are recorded as 8.1 and 8.2.

Therefore, if the correct measures are used to draft a new dot plot, we would have the following data points and number of dots representing the correct frequency of each measures:

Therefore, the two numbers on the dot plot that will have the same number of dots would be: B. 8.0 and 8.2.

Learn more about dot plot on:

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Answer:

thanks

Step-by-step explanation:

for 5 poinvf67t4

Answer:

1

Step-by-step explanation:

f(x) = a(2) + 6 = 2a + 6

Given f(2) = 8

so 2a + 6 = 8

2a = 8 - 6 = 2

so a = 1

Answer:

radius 2.7

Step-by-step explanation:

2.7 on the axes

Answer:

Step-by-step explanation:

Radius = 5

Volume = 4/3 π r3

= 4/3 (3.14) 5^3

= 523.33

Answer:

17 and 18

Step-by-step explanation:

divide 35 by 2 and u get 17.5, this is in between 17 and 18 so that's why they are they consecutive numbers.

Answer:

True

Step-by-step explanation:

Answer:

median = 11

Step-by-step explanation:

The median is represented by the vertical line inside the boxplot

That is the median = 11

Answer:

11

Step-by-step explanation:

Where the line is ,it's at 11.

Also i got it correct on khan

Answer:

Of course.

Step-by-step explanation:

Hope it helps you:)

Answer 1:

[tex]f\left(x\right)o\left(x\right)=5x^2+5x[/tex]

Answer 2:

[tex]g\left(x\right)o\left(x\right)=x^2+2x+1[/tex]

Answer 3:

[tex]f\left(3\right)o\left(3\right)=60[/tex]

Answer 4:

[tex]g\left(3\right)o\left(3\right)=16[/tex]

I hope this helps you

:)

Answer:  3m + 1 - m

plzz mark brainliest ;)

Answer:

how do star appear to move in night sky

Answer:

total of 46.6 dollars

Step-by-step explanation:

8.60x1= 8.60

5x7.80= 39

Answer:

(0,  -14)

Step-by-step explanation:

Answer:

2 is the answer of the question

Answer:

no

Step-by-step explanation:

3^3=27

so 3^3+3^3+3^3=27+27+27=81

3^9=19683

Answer:

No it's not same because we cannot add degrees. 3^9 is much greater than 3^3+3^3+3^3.

27+27+27≠ 19, 683

81≠19,683

Pls mark me brainliest

Step-by-step explanation:

Answer:

132 inches of string in total

Step-by-step explanation:

since he uses 22 inches of each color and he has 6 colors what you have to do is multiply 22 by 6 and you get 132

Answer:

4

Step-by-step explanation:

To make a unit fraction, say 1⁄4 to 1, we need to add it 4 times. Or in other words, multiply 1⁄4 by 4. Thus, the multiplicative inverse of 1⁄4 is 4.

Hope this helps

Answer:

4

Step-by-step explanation:

To make a unit fraction, say 1⁄4 to 1, we need to add it 4 times. Or in other words, multiply 1⁄4 by 4. Thus, the multiplicative inverse of 1⁄4 is 4.

Using an exponential function, it is found that the mass 2.2 thousand years from now will be of 103.6 mg.

It is modeled by:

[tex]A(t) = A(0)e^{-k\frac{t}{n}}[/tex]

In which:

In this problem:

Then:

[tex]A(t) = A(0)e^{-k\frac{t}{n}}[/tex]

[tex]A(t) = 135.2e^{-0.121\frac{t}{1000}}[/tex]

The mass 2.2 thousand years from now will be given by:

[tex]A(2200) = 135.2e^{-0.121\frac{2200}{1000}} = 103.6[/tex]

The mass 2.2 thousand years from now will be of 103.6 mg.

More can be learned about exponential functions at https://brainly.com/question/25537936

a. Wool Inc. should process further Red Wool and Blue Wool.

b. Wool Inc. can sell Blue Wool at the split-off point at $24 per unit ($120,000/5,000) without further processing, instead of selling at $36 per unit ($180,000/5,000) after further processing.

The split-off point is the processing point when joint products can be further processed separately.

At the split-off point, the costs of the joint products can be identified separately.

Sales Value and Additional Costs If Processed Further:

                    Pounds       Sales Value     Final Sales   Further      Profit from

                 Produced       at Split-Off          Value   Processing       Further

                                                                                        Cost       Processing

Red Wool     10,000         $110,000       $200,000    $50,000   $40,000

Blue Wool     5,000          100,000           180,000      60,000     20,000

Yellow Wool 3,000           90,000            110,000       21,000       -1,000

Thus, the profits from further processing are computed as the Final Sales Value minus Further Processing Cost minus Sales Value at the Split-off point.

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