Suppose the only solution of AX=B is the zero matrix (A is nxn and B is nx1). Then the RREF of A|B is I|C where the sum of the entries of C is ____ ?

Answer:

u = 2√3 ≈ 3.46410162

Step-by-step explanation:

Because this is a right triangle, you can use the trigonometric formulas:

tangent = opposite side/adjacent side

sine = opposite side/hypotenuse

cosine = adjacent side/hypotenuse

Here, we have the measure of an angle, 60°. Side u is opposite to it and the hypotenuse, 4, is given. We can use these numbers to work with:

sine = opposite side/hypotenuse

sin(60) = u/4

sin(60)/1 = u/4

Cross multiply:

u = 4 (sin(60))

Input into calculator:

u = 2√3 ≈ 3.46410162

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

Explanation:

The jump from 4 inches to 5 inches is 5/4 = 1.25

In other words, 4*1.25 = 5

So we need to multiply every dimension by the scale factor 1.25 to enlarge the image. The 5 inch dimension then goes to 5*1.25 = 6.25 inches

----------

Here's another way you can solve

(old width)/(old length) = (new width)/(new length)

4/5 = 5/x

4x = 5*5

4x = 25

x = 25/4

x = 6.25

Answer:

Your answer would be Slope m = -3

Step-by-step explanation:

Step 1: Graph the points on a coordinate plane( refer to image!)

Whenever your trying to find a slope of 2 order pairs, remember this

m = rise/run. ( Slope = rise over run.) = Δy/Δx

Now we solve:

M = rise/run = Δy/Δx

M = y2 - y1/x2-x1

M = 5 - (-4) / -5-(-2)

So we get  M = 9/-3 and 9 divided by -3 is -3

So, the slope of (-2,-4) and (-5,5) is -3.

The ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.

Given the scale factor of two similar polygons, we need to find the ratio of their perimeters and the ratios of their areas,

To find the ratio of the perimeters of two similar polygons, we can simply write the scale factor as it is because the ratio of the perimeter is equal to the ration of the corresponding lengths.

1) So, perimeter = 3:1

The ratio of areas between two similar polygons is equal to the square of the scale factor.

Since the scale factor is 3:1, the ratio of their areas is:

(Ratio of areas) = (Scale factor)² = 9/1 = 9:1

Similarly,

2) Perimeter = 7:4

Area = 49/16

Hence the ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.

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The polynomial that has a factor (3x + 2) and the constant term negative 10 will be p(x) = 3x - 8.

Let a, b, c, and d are the zeroes of the polynomial.

Then the polynomial is given as,

⇒ (x - a)(x - b)(x - c)(x - d)

The degree of the polynomial will be greater than or equal to the number of zeroes.

The zeros are -2/3. Then the factor of the polynomial is given as,

x = - 2/3

3x = - 2

3x + 2 = 0

The polynomial that has a factor (3x + 2) and the constant term negative 10 will be given as,

p(x) = 3x + 2 - 10

p(x) = 3x - 8

The polynomial that has a factor (3x + 2) and the constant term negative 10 will be p(x) = 3x - 8.

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The number of marbles that Leah has is: 48 marbles

Information about the problem:

To solve this problem we must establish the equation, isolate the variable following the rules of clearance and solve the operations:

Solving the equation we have:

1/3 x = 4/5 (x-28)

Simplifying the equation we have:

5(1x) = 3*[4*(x-28)]

5x = 12(x-28)

5x = 12x-336

336 = 12x-5x

7x = 336

x = 336/7

x = 48

Leah = x

Leah = 48

Dan = x - 28

Dan = 48-28

Dan = 20

An equation is the equality between two algebraic expressions, which have at least one unknown or variable.

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Answer:

  add the values of the symbols or symbol pairs

Step-by-step explanation:

You want to know how to convert Roman Numerals to decimal numbers.

The symbols used in Roman Numerals are {I, V, X, L, C, D, M}. Respectively, they have values {1, 5, 10, 50, 100, 500, 1000}. The values of these symbols are multiplied by 1000 by an overline.

A number can be converted to decimal by working right to left. In general, the value of a symbol is added to the total. When a symbol of lesser value than the previous one is encountered, its value is subtracted. (Usually, the value being subtracted is a power of 10.)

Aliases exist. Without knowledge of the rules the Romans used for writing their numbers, we can invent numbers that can be written two or more ways:

  1950 = MLM = MCML

As we noted above, the form MLM = 1950 would probably not be used, since the subtracted L is not a power of 10.

We expect that 1999 would likely be written MCMXCIX, rather than MIM. That way, the character being subtracted is not less than 10% of the character it is subtracted from.

__

Additional comment

Use of an overline is not the only way that the system is extended to higher values. Different notations are found in different contexts.

The basic idea of Roman Numerals is to express value by the character used, rather than its location in a number. It is not a "place value" system.

There is no zero. There are no negative numbers.

The reference to "symbol pairs" in the Answer section above is to recognize a pair of symbols in which the one on the left is subtracted.

Answer:

10416

Step-by-step explanation:

102 squared is 10404. 10404 + 12 = 10416

In linear equation, $ 442.54 tall is the tower.

What are a definition and an example of a linear equation?

Suppose A is the window, B is the top of the tower, C is the bottom of the tower, and D is the point on the tower at the same horizontal level as the window.

Find BD, DC then add these together to give this°.

For BD :  AD is 350 ft, the angle CAD is 42.  

So BD/350 = tan 42°.  

      BD =  0.9004 × 350

      BD  = 315.14

   AD/350  =  tan20°

    AD =   0.364 × 350

    AD =  127.4

AD + BD =   315.14 +   127.4  =  $ 442.54

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Answer:

the "^" symbol is called the exponent symbol

exponent is fast multiplication

in other words x^y means multiplying 'x' y times

Step-by-step explanation:

Answer: its the 2nd one

Step-by-step explanation:

Answer:

x³+y³+z³=k , k from 1 to 100. To Find : x, y, and z. Solution: This Question can have lot of solutions as constraints are very less.

Step-by-step explanation:

Answer: b

Step-by-step explanation: 7% of 80 = 5.6

12% of 20=2.4

5.6+2.4=8.0

To calculate the overall average age of the animals at the rescue, we need to consider the proportions of dogs and cats and their respective average ages.

Let's calculate the overall average age:

Average age of dogs = 7 months

Average age of cats = 12 months

Proportion of dogs = 80% = 0.8

Proportion of cats = 20% = 0.2

Overall average age = (Proportion of dogs * Average age of dogs) + (Proportion of cats * Average age of cats)

                   = (0.8 * 7) + (0.2 * 12)

                   = 5.6 + 2.4

                   = 8

Therefore, the overall average age of the animals at the rescue is 8 months.

The correct answer is B) 8 months.

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Answer:

477

Step-by-step explanation:

Answer:

Oh THIS IS B TRUST I HAD DONE THIS BEFOR

I REALLY NEED BRAINLIST CAN U GIVE ME BRAINLIST PLZZZZZZZZZZZZz

Step-by-step explanation:

Answer:

There is one solution (x=2, y=0)

Step-by-step explanation:

y=4x-8

4y=4x-8

Divide the second equation by 4

y = x - 2

Set the two equations equal

4x - 8 = x-2

Subtract x from each side

3x -8 = -2

Add 8 to each side

3x = 6

Divide by 3

x = 2

Now find y

y = x-2

y = 2-2=0

Answer:x=2,y=0

Step-by-step explanation:

4(4x-8)=4x-8

16x-4x=32-8

12x=24

X=2

Y=0

Part A:

$8.00+(r⋅$1.40)

Part B:

($26.00-($8.00)÷$1.40)=5

He can go on 5 rides.

Answer:

The answer is A.

Michael wants to spend less money than his account hold, so the inequality must include " > 1,089.17.  The inequality should also include 525.20 as the cost of the TV and 49y as the number and cost of the speakers.

Answer:

525.20 + 49 y ≤1089.17

Step-by-step explanation:

The cost of the tv plus the cost of the speakers times the number of speakers must be less than or equal to the amount in the account

525.20 + 49 y ≤1089.17

Answer:

What are you talking about .

Step-by-step explanation:

Answer:

35

Step-by-step explanation:

A parametric description of the solution set of a linear system is the same as solving the system is the false statement.

If a linear system has at least one solution, only then can the solution set be stated using a parametric description. The set of ordered pairs that make up the solution to an equation with two variables is referred to as the solution set. You'll discover what a solution set is in this tutorial and witness an example. By combining two equations with two variables into one equation with one variable, we can solve a system of equations. Since there are two variables in each equation in the system, replacing a variable with an expression can help minimize the number of variables in an equation.

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The probability that Ephraim gets the same number of heads that Keiko gets is (A)1/4.

Probability refers to a possibility that deals with the occurrence of random events.

The probability of all the events occurring need to be 1.

The formula of probability is defined as the ratio of a number of favorable outcomes to the total number of outcomes.

Given that Keiko tosses one penny and Ephraim tosses two pennies.

We need to find  the probability Ephraim gets the same number of heads that Keiko gets;

Probability = 1/4 chance for Ephraim

Probability = 1/2 chance for Keiko

Hence, the probability that Ephraim gets the same number of heads that Keiko gets is (A)1/4.

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Answer:

5 ratio 4 is

35 ratio 28

they both multiply by 7.....

Answer:

\(\large \boxed{x=28}\)

Step-by-step explanation:

\(5:4=35:x\)

Ratios can be expressed as fractions.

\(5/4=35/x\)

Cross multiply.

\(5 \times x = 4 \times 35\)

\(5x=140\)

Divide both sides by 5.

\((5x)/5=140/5\)

\(x=28\)

Answer:

\(\frac{5x^{3}-18x^{2} -5x-27 }{x}\)

Step-by-step explanation:

Answer:

48

Step-by-step explanation:

84/7 = 12

12*4 = 48

Answer:

it represent the 10 pound and 4000 multiply = ans

Answer:

x=0 or x=4

Step-by-step explanation:

Lets Solve!

First we need to factor the left side of the equation. Both terms include x.

\(x^2-4x =0\)

\(x(x-4) =0\)

If we multiplied x by (x-4) we would be back at \(x^2-4x =0\).

Set factors equal to 0.

x=0 or x−4=0

x=0 or x=4

Woohoo! Brainliest Appretiated! Hope I helped!

Answer:

\(x=0,4\)

Step-by-step explanation:

Factor out the common terms from x²-4x. You can factor out x:

\(x(x-4)=0\)

Multiplication can be seen as (_)(_). Rewrite:

\((x)(x-4)=0\)

Set both equal to 0:

\(x=0\\\\x-4=0\)

Simplify the second equation:

\(x-4=0\\\\x-4+4=0+4\\\\x=4\)

So, x=0 or x=4

:Done

Yes, there is a relationship between advertisement expenditures and sales revenues. The fitted regression model is: Sales = 1591.28 + 3.59(Advertisement).

1. To construct a scatter plot, plot the advertisement expenditures on the x-axis and the sales revenues on the y-axis. Each data point represents one observation.
2. Use Excel to fit a linear regression line to the data by following the steps outlined in the textbook.
3. The fitted regression model is in the form of: Sales = Intercept + Slope(Advertisement). In this case, the model is Sales = 1591.28 + 3.59
4. The slope of 3.59 tells us that for every $1,000 increase in advertisement expenditures, there is an estimated increase of $3,590 in sales.
5. To determine if the slope is significant, perform a hypothesis test or check if the p-value associated with the slope coefficient is less than the chosen significance level.
6. The intercept of 1591.28 represents the estimated sales when advertisement expenditures are zero. In this case, it is not meaningful as it does not make sense for sales to occur without any advertisement expenditures.
7. The value of the regression coefficient, r, represents the correlation between advertisement expenditures and sales revenues. It ranges from -1 to +1.
8. The value of the coefficient of determination, r^2, tells us the proportion of the variability in sales that can be explained by the linear relationship with advertisement expenditures. It ranges from 0 to 1, where 1 indicates that all the variability is explained by the model.
9. To predict sales when the business spends $950,000 in advertisement, substitute this value into the fitted regression model and solve for sales. This will help determine if the model underestimates or overestimates sales.

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Answer:

\(x=-7,x=-1,x=-0.289898,x=0.689898\)

or \(x=-7,x=-1,x=\frac{1}{5}-\frac{\sqrt{6}}{5},x=\frac{1}{5}+\frac{\sqrt{6}}{5}\)

Step-by-step explanation:

Factor by grouping

\(g(x)=5x^4+38x^3+18x^2-22x-7\\\\g(x)=5x^4+33x^3-15x^2-7x+5x^3+33x^2-15x-7\\\\g(x)=x(5x^3+33x^2-15x-7)+1(5x^3+33x^2-15x-7)\\\\g(x)=(x+1)(5x^3+33x^2-15x-7)\\\\g(x)=(x+1)(5x^3+35x^2-2x^2-14x-x-7)\\\\g(x)=(x+1)(5x^2(x+7)-2x(x+7)-1(x+7))\\\\g(x)=(x+1)(x+7)(5x^2-2x-1)\\\\0=(x+1)(x+7)(5x^2-2x-1)\\\)

We can easily see that the first two zeroes are \(x=-1\) and \(x=-7\), however, the third zero will need the help of the quadratic formula:

\(0=5x^2-2x-1\\\\x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\ \\x=\frac{-(-2)\pm\sqrt{(-2)^2-4(5)(-1)}}{2(5)}\\\\x=\frac{2\pm\sqrt{4+20}}{10}\\ \\x=\frac{2\pm\sqrt{24}}{10}\\ \\x=\frac{2\pm2\sqrt{6}}{10}\\ \\x=\frac{2}{10}\pm\frac{2\sqrt{6}}{10}\\ \\x=\frac{1}{5}\pm\frac{\sqrt{6}}{5}\\\\x_1\approx0.689898\\\\x_2\approx-0.289898\)

Therefore, the zeroes of the function are \(x=-7,x=-1,x=-0.289898,x=0.689898\)

The project is expected to generate a return of 16.1% per year, which is higher than the company's cost of capital.

To calculate the IRR of the project, we need to find the discount rate at which the present value of the cash inflows equals the initial cost of the investment. We can use the following formula to find the IRR:

NPV = 0 = CF0 + CF1/(1+IRR)¹ + CF2/(1+IRR)² + CF3/(1+IRR)³ + CF4/(1+IRR)⁴

Where:

CF0 = initial investment = -$10,000

CF1, CF2, CF3, CF4 = cash flows in years 1, 2, 3, and 4, respectively

IRR = the discount rate we want to find

Using the given values, we can plug them into the formula and solve for IRR using a financial calculator or Excel. Alternatively, we can use a trial-and-error method to find the discount rate that makes NPV equal to zero.

Here is one way to solve for IRR using Excel:

In Excel, create a new spreadsheet.

In cells A1 to A5, enter the cash flows: -10000, 6000, 7500, 7000, and 2000.

In cell B1, enter the formula: =IRR(A1:A5)

Press Enter. The IRR of the project is displayed in cell B1 as a percentage.

Using this method, we find that the IRR of the project is approximately 16.1%.

Therefore, the Internal Rate of Return (IRR) of the project is calculated to be 16.1%, which indicates that the project is expected to generate a return that is greater than the cost of capital for the company. Hence, investing in this project is considered financially viable for Big Wolf Demolition.

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