What's a Square matrix ?​

Answer:

(2, -3)

Step-by-step explanation:

the intersection point is the solution.

Answer:

2,-3

Step-by-step explanation:

Because the other guy said so

Answer

how much is like saying time the this

Step-by-step explanation:

60,000 time 9.35%= 56100

Answer:

7850

Step-by-step explanation:

Net worth: Assets-debt

The assets are:

car

investments

The debts:

credit cards

so we have

(3700+5400)-1250= 7850

Answer:

1188

Step-by-step explanation:

First, multiply 6*8 which is 48.

Then leave the 8 at the bottom and move the 4 on top of the 9.

Then multiply 6*9 =54, then add 4, which is 58.

Then leave the 8 at the bottom in front of the first 8, and move the 5 on top of the 1.

Then multiply 6*1 = 6, then add 5, which is 11.

Then leave the 11 at the bottom in front of the other 8.

(I know this is a bit confusing but bear with me.)

The answer is 1188

Answer:

y = 2x + 4

Step-by-step explanation:

remember the formula of a line: y=mx+b    (the y point = the slope times the x point + the y-intercept)

To find the slope:

Remember: slope is rise over run, or the number of units the line goes up, over the amount of units the line goes over. so  \(\frac{rise}{run}\)  (rise over run)

If we start at the leftmost point, we count up 2, over 1 until we get to our next point. Therefore, the slope is 2/1, or 2.

Now to find the y-intercept:

If we assume each square represents 1 unit, the line will intercept the y-axis (or the vertical line) at 4. We know this simply by counting the horizontal lines across the graph until we get to our linear line. We count up 1, 2, 3, 4 until we reach the line.

Put it together in the y = mx + b format, and you get y = 2x + 4

I really hope this helps you understand! Tell me if you need anymore clarification, I'll be happy to help!

In statistical analysis, a hypothesis refers to a tentative explanation or prediction that is based on limited evidence and is subject to further investigation and testing. It is a statement that can be either true or false, and is typically formulated in such a way that it can be tested using statistical methods.

The hypothesis is often used to guide the research process, to help identify potential patterns or relationships in the data, and to evaluate the significance of the results.

Overall, the hypothesis plays a critical role in statistical analysis, as it provides a framework for understanding and interpreting data, and helps to ensure that research findings are reliable and valid.

A hypothesis in the context of statistical analysis is a tentative explanation or prediction about the relationship between two or more variables, which is subject to testing and empirical evaluation using statistical methods.

It is a statement that can be either true or false, and it is usually formulated in terms of the expected direction and strength of the relationship between the variables of interest.

The hypothesis is typically derived from existing theory, prior research, or common sense, and it serves as a guide for the collection, analysis, and interpretation of data in a scientific study.

The process of testing a hypothesis involves setting up null and alternative hypotheses, selecting an appropriate statistical test, collecting and analyzing data, and drawing conclusions based on the results of the analysis.

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In order to solve the system of equations, let's equate both values of y and solve for x using the quadratic formula:

Now, let's calculate the values of y for each value of x:

Therefore the solutions are (1, 7) and (5/2, 10).

Correct option: second one.

Answer:

3ab+(c^2)/a

you can't really solve this because g and r is not in the equation.

I hope this is what it’s asking for…

13x+4+?=50

13x+?=46

Answer:

unknown length: 46 - 13x

Explanation:

Let the unknown side be s.

s + 13x + 4 = 50

s = 50 - 13x - 4

s = 46 - 13x

The 95% confidence interval estimate of the population mean is 98.10< μ < 98.30.

Given that

sample mean = ~x = 95.2

sample standard deviation = s = 0.7

sample size = n = 175

Degrees of freedom = d.f = n - 1 = 175 - 1 = 174

αt /2,d.f = 1.974.

The explanation for step 1

At 95% confidence level

 α= 1-0.95% =1-0.95 =0.05

α /2=0.05/ 2= 0.025

αt /2,d.f = t0.025,174 = 1.974

αt /2,d.f = 1.974

The explanation of Step 2

Margin of error = E = t/2,df x (s /Vn )    =  1.974 x ( 0.7/ V175)   = 0.10

Margin of error = E = 0.10

The 95% confidence interval estimate of the population mean is,

~x- E < μ < ~x + E

98.2 - 0.10< μ < 98.2 + 0.10

98.10< μ < 98.30

Margin of error = E = 0.10

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Yes it is correct that the expected value of a random variable can be interpreted as a long-run average.

The expected value of a random variable is a concept used in probability theory and statistics. It is a way to summarize the average behavior or central tendency of the random variable.

To understand why the expected value represents the average value that the random variable would take in the long run, consider a simple example. Let's say we have a fair six-sided die, and we want to find the expected value of the outcomes when rolling the die.

The possible outcomes when rolling the die are numbers from 1 to 6, each with a probability of 1/6. The expected value is calculated by multiplying each outcome by its corresponding probability and summing them up.

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Answer:

D.40:15 are equivalent to the ration of white socks to brown sock which is 8:3

Answer: d

Step-by-step explanation:

Note that the distance to the tower and the height of the tower create a right triangle at the base of the tower.  The equation to find the height of a right triangle is to multiply the length times the tangent of angle β.

Given:

b = a · tanβ

tan(30°) = √3/3

Step 1:  Solve

b = (30/1) · (√3/3)

b = (30 · √3) / (1 · 3)

b = (30√3) / (3)

b = 10√3

Answer:

angle ABD=42°

Step-by-step explanation:

join AO with dotted line

AO=OD...radii

triangle AOD is an isosceles

angle DAO=angle ODA.....base angles of isosceles

angle DAO=48°

AngleAOD=180°-(48°+48°)....angle sum of triangle

=180°-96°

=84°

Angle AOD=2×angle ABD....angle at centre twice angle circumference

2xangle ABD=84°

Angle ABD=84°÷2

=42°

Answer:

y 1. 7

y 2. 20

y 3. 104

Step-by-step explanation:

So the rule is that the x+5 is goung to give you your y axis

1. 2+5=7

2. 15+5=20

3.99+5=10

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The length of one edge of the tabletop is 4.89 feet.

We know that square is a shape that has all the side equal. Based on this using the formula to find the length of edge of the tabletop.

The area of square table is given by the formula -

Area of square table = side²

We will keep the value of area of square table to find the value of side which will be length of edge

24 = side²

Side = ✓24

Taking square root for the value on right side of the equation

Side = 4.89

Hence, the length of one edge of the tabletop is 4.89 feet.

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Answer: ∠WZY=150°

Step-by-step explanation:

Analysis :

ΔWXY is an isosceles triangle

perpendicular to WX intersecting:

XY at A

∠XWA = 21°

∠WXA = 90°-21° = 69°

Now, ΔXYZ is equilateral,

∠XYZ = ∠YXZ = 60°

Then,

∠WXZ = ∠WXA - ∠YXZ

= 69°-60°

= 9°

Since the angles of a triangle = 180°

∠WZY = ∠WZX = 180° - ∠XWA - ∠WXZ

= 180° - 21° - 9°

= 150°

Answer:

3

Step-by-step explanation:

every term is divisible by 3, therefore it is the greatest common factor

Answer:

0.6 + 15b + 4 = 25.6

15b +4 = 25

15b = 25 - 4

15b = 21

b = 21/15

b = 7/5

hope it helps

Answer:

Exact Form:

b=7/5

Answer:

her pay increases by 30$ each hour she work

Step-by-step explanation:

hope it helps

1. Observe problem

1-(1/8+1/12+1/2)

Make all common denominator

The Least common multiple of 8,12, and 2 is 24

1-((3+2+12)/24)=

1-17/24=

7/24

Therefore, 28 years make up 7/24 of his life.

Simplifying, he grows 4 years for every 1/24 of his life

4 times 24 is 96, so

Fred is 96 currently(that's pretty old)

\(\bold{\huge{\pink{\underline{ Solution }}}}\)

\(\bold{\underline{ Given :- }}\)

\(\bold{\underline{ To \: Find :- }}\)

\(\bold{\underline{ Let's \: Begin :- }}\)

Let the present age of Fred be x

Therefore,

According to the question,

\(\sf{ 1/8x + 1/12x + 1/2x + 28 = x }\)

\(\sf{ (3x + 2x + 12x )/24 + 28 = x }\)

\(\sf{ 17x/24 + 28 = x }\)

\(\sf{ 28 = x - (17/24)x}\)

\(\sf{ 28 = 24x - 17x/24 }\)

\(\sf{28 = 7x/24 }\)

\(\sf{ 28 = 7x/24}\)

\(\sf{ 7x = 28 × 24}\)

\(\sf{ x = 672/7}\)

\(\sf{ x = 96\: years}\)

\(\sf{\red{ Hence,\: The\: total\: age\: of\: Fred \:is \: 96\: years }}\)

Answer:

$5 per adult and $3 per kid

Step-by-step explanation:

5x10=50

3x3=9

50+9=59

4x5=20

3x3=9

20+9=29

Let the original price = x

From X to get the new price you multiply by 1 + the percent of the increase which is 25%

1,25X = 2.00

Divide both sides by 1.25:

X = 1.60

The original price was B. 1.60

Answer:

x=1.60

Step-by-step explanation:

Let x be the original price

We increase by 25%

x+ .25x = new price

1.25x = 200

Divide each side by 1.25

x = 2.00/1.25

x=1.60

To find f'(x), the derivative of the function f(x) = 7/(5x^4), we apply the power rule for differentiation. The derivative is given by f'(x) = -28/(5x^5).

The function f(x) = 7/(5x^4) can be rewritten as f(x) = 7 * (5x^(-4)). To find the derivative f'(x), we can apply the power rule, which states that for a function of the form g(x) = ax^n, the derivative is given by g'(x) = a * n * x^(n-1).

In this case, a = 7 and n = -4. Applying the power rule, we have:

f'(x) = 7 * (-4) * (5x^(-4-1))

= -28 * 5 * x^(-5)

= -140x^(-5).

Simplifying further, we can rewrite x^(-5) as 1/(x^5), which gives us:

f'(x) = -140/(x^5).

Therefore, the derivative of f(x) = 7/(5x^4) is f'(x) = -140/(x^5). This derivative represents the rate of change of the function f(x) with respect to x.

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The average number of customers in the West End Donut Shop simultaneously is 30, which is obtained by using the arrival rate and service rate formulas for a queueing system.

To find the average number of customers in the shop simultaneously, we can use the concept of the arrival rate and the service rate.

The arrival rate is the rate at which customers arrive at the shop, and can be calculated as:

arrival rate = number of customers / time

arrival rate = 2400 customers / 10 hours

arrival rate = 240 customers per hour

The service rate is the rate at which customers are served by the shop, and can be calculated as:

service rate = 60 minutes / 5 minutes per customer

service rate = 12 customers per hour

Using the formula for the average number of customers in a queueing system, we get:

average number of customers = arrival rate / (service rate - arrival rate)

average number of customers = 240 / (12 - 240/60)

average number of customers = 240 / 8

average number of customers = 30

Therefore, on average, there are 30 customers in the West End Donut Shop simultaneously.

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Answer:

6( 3+1)

Step-by-step explanation:

18 + 6

Factor a 6 from each term

6*3 + 6*1

6( 3+1)

The area of the trapezium shown is 284.31 in²

An equation is an expression that shows the relationship between variables and numbers.

The area is calculated for a two dimensional shape. It shows the amount of space occupied for that shape.

The area of a trapezium is given by:

Area = (1/2)(sum of parallel sides) * height

For the trapezium shown, the parallel sides have a measure of 17 inches and 31 inches respectively. The height is 11.7 inches, hence:

Area = (1/2)(17 + 31.6)(11.7) = 284.31 in²

The area is 284.31 in²

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