T/F : If A is a 5Ã4 matrix, and B is a 4Ã3 matrix, then the entry of AB in the 3rd row / 2nd column is obtained by multiplying the 3rd column of A by the 2nd row of B

we can say that the teacher's gοal οf a standard deviatiοn οf at mοst 8 pοints was achieved, at a 5% level οf significance.

A measure οf a grοup οf values' variance οr dispersiοn in statistics is called the standard deviatiοn. When the standard deviatiοn is lοw, the values are mοre likely tο fall within a narrοw range, alsο knοwn as the expected value, whereas when the standard deviatiοn is high, the values tend tο be clοser tο the mean.

The lοwercase Greek letter sigma, which stands fοr the pοpulatiοn standard deviatiοn, οr the Latin letter s, which stands fοr the sample standard deviatiοn, are mοst frequently used in mathematical equatiοns and texts tο represent standard deviatiοn. Standard deviatiοn is alsο sοmetimes referred tο as SD.

suppοse that οn a 100-pοint test, the teacher's gοal is fοr her students' exam scοres tο have a standard deviatiοn οf at mοst 8 pοints.

chi²\(= (n-1)*s^2 /\sigma^2\)

where n is the sample size, s is the sample standard deviatiοn, and sigma is the hypοthesized pοpulatiοn standard deviatiοn under the null hypοthesis.

In this case, n = 25, s = 9.5, and sigma = 8. Substituting these values, we get:

chi² \(= (25-1)*9.5^2 / 8^2 = 33.64\)

The degrees οf freedοm fοr this test is n-1 = 24. Using a chi-squared table with 24 degrees οf freedοm, we find that the critical value fοr a οne-tailed test at a 5% level οf significance is 36.42.

Therefοre, we can say that the teacher's gοal οf a standard deviatiοn οf at mοst 8 pοints was achieved, at a 5% level οf significance.

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The fact family of the numbers are given by

a) 4 , 7 , 11

b) 2 , 6 , 8

c) 5 , 4 , 9

d) 9 , 7 , 16

Given data ,

Numbers that do not form a fact family are any set of numbers that do not follow this pattern.

And , fact family of the numbers are given by

a) 4 , 7 , 11

b) 2 , 6 , 8

c) 5 , 4 , 9

d) 9 , 7 , 16

Hence , the fact family of numbers are solved

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Answer:

23-5=18

Step-by-step explanation:

ok so 23 feet above would be positive 23 but 5 ft below would be negitive so you write 23-5 and then solve

Answer:

A cube

Step-by-step explanation:

If you fold it, you'll see

Answer:

surface area

Step-by-step explanation:

A rectangular prism is an optical element which is transparent with flat sides that can pass or reflect light. A rectangular prism is a cube where all its sides are the same.

In the context, in order to find the total square feet of plywood needed to make a prism we have to determine its surface area.

The total surface area of a rectangular prism can be found out by the formula :

A = 2 (hl + lw + wh)

where, h = height of the rectangular prism

            l = length of the rectangular prism

            w = width of the rectangular prism

The equation adds 0.10x to her fixed salary of $75 to find her total salary based on her sales.

What is the equivalent expression?

Equivalent expressions are expressions that perform the same function despite their appearance. If two algebraic expressions are equivalent, they have the same value when we use the same variable value.

The correct equation that represents Sondra's salary is:

y = 0.10x + 75

In this equation, "y" represents Sondra's salary and "x" represents her sales.

The equation states that Sondra earns a fixed weekly salary of $75, and in addition to that, she earns a commission of 10% of her sales.

Hence, the equation adds 0.10x to her fixed salary of $75 to find her total salary based on her sales.

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Answer:

(0,-1), y, 3, 3 up, 1 right

(0,1), y, 1 up, 1 right

Step-by-step explanation:

just fill in the blanks in the order of these answers

Answer:

One is 8x+12y= 112

Step-by-step explanation:

I don't know if it's right tho. SO don't come at me.

Answer:

BE=DE and AE=CE (the order of these 2 does not matter)

Vertical Angles

SAS

Step-by-step explanation:

Answer:

a. \(\$3107\)

b. 17 years

c. The amount that is currently charged by the college you attend is much higher than the amount charged in two-year college in the present year.

Step-by-step explanation:

a.

\(f(x)=64x+2083\)

Here, x is a the number of years after 2000 and f(x) is the total cost.

To approximate the yearly cost of  attending a two-year college in the year 2016,  find \(f(16)\).

\(f(16)=64(16)+2083\\\\=1024+2083\\\\=\$3107\)

b.

To predict in what year the yearly  cost of tuition and required fees will exceed $3200, solve \(f(x)=3200\)

\(64x+2083=3200\\\\64x=3200-2083\\\\=1117\\x=\frac{1117}{64}\\\\ =17.45\)

So,

x is approximately equal to 17 years.

c.

The present year is 2020.

To approximate the yearly cost of  attending a two-year college in the present year, find \(f(20)\)

\(f(20)=64(20)+2083\\\\=1280+2083\\\\=\$3363\)

The amount that is currently charged by the college you attend is much higher than the amount charged in two-year college in the present year.

Applying the scale factor of 1:5, Lisa del Giocondo's face was 1.6 inches long in the sketch.

If the scale factor from the sketch to real life is 1:5, then it means that every inch in the sketch represents 5 inches in real life.

Therefore, to find out how long Lisa del Giocondo's face was in the sketch, we need to multiply the real-life length of her face by the inverse of the scale factor, which is 1/5.

If her face was 8 inches long in real life, then her face in the sketch would be:

8 inches * (1/5) = 1.6 inches

Therefore, based on the scale factor given, Lisa del Giocondo's face was 1.6 inches long in the sketch.

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Answer:

mode is 6

Step-by-step explanation:

it appears four times whereas no other number appears more than three times

Quantitative measures play a crucial role in answering research questions by providing numerical data, which allows for precise analysis and interpretation of results. This type of measurement is often used in combination with qualitative methods to gain a comprehensive understanding of the subject under study.

Quantitative measures are numerical values that can be used to assess various aspects of a situation, process, or outcome. These measures are often used in research studies to provide objective data that can be analyzed statistically. There are three main types of quantitative measures: nominal, ordinal, and interval/ratio. Nominal measures are used to categorize data into groups based on shared characteristics, such as gender or race. These measures do not have any inherent order or ranking.

Ordinal measures rank data in order from lowest to highest, but do not provide any information on the magnitude of the differences between values. For example, a Likert scale that asks respondents to rate their agreement with a statement on a scale of 1 to 5 is an ordinal measure. Interval/ratio measures provide information on both the order and magnitude of differences between values. Examples of interval measures include temperature in Celsius or Fahrenheit, while examples of ratio measures include weight and height.

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The second option shows a pair of triangles which are congruent by the SSS congruence theorem.

The SSS (Side - Side - Side) congruence theorem states that if two triangles have three sides that are congruent to each other, then the two triangles are congruent by the SSS theorem.

The congruent sides for the second option are given as follows:

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Answer:

Step-by-step explanation:

α + β = -b/a

αβ = c/a

α² + β² = (α + β)² - 2αβ

           \(= (\frac{-b}{a})^{2}-2\frac{c}{a}\\\\= \frac{b^{2}}{a^{2}}-\frac{2c}{a}\\\\=\frac{b^{2}}{a^{2}}-\frac{2c*a}{a*a}\\\\=\frac{b^{2}-2ca}{a^{2}}\)

Answer:

1 yard = 36 inches.

a

s

a

a

aa

a

a

a

a

aa

Answer:

Step-by-step explanation:

Factor to solve.

12a2 + a – 35 = 0

>Multiply the first and the last, 12 and -35

     (12)(-35) = -420

>  Find 2 numbers that multiply to -420 but add to middle term, 1

       -20 and +21 multiply to -420 but adds to 1

>Replace the middle term with -20 and 21

      12a² + a – 35 = 0

       12a² + 20a -  21a – 35 = 0

>Group the first 2 and last 2 terms

      ( 12a² + 20a) (-  21a – 35) = 0

>Take out GCF from each of the groupings

      4a ( 3a + 5) -7(3a + 5) = 0

>Take out GCF (3a + 5)

      ( 4a - 7) ( 3a + 5) = 0

>Set each =0 and solve for a

       ( 4a - 7) = 0                      ( 3a + 5) = 0

          a=7/4                                  a = -5/3

The angle of elevation of the ramp to the nearest degree is 34°.

we can use trigonometry to determine the angle of elevation of the ramp.To begin, we need to draw a diagram to visualize the problem.

Let's assume that the height of the end of the ramp is h, and the horizontal distance from the bottom of the ramp to the building is d.

From the diagram, we can see that we have a right-angled triangle where the height of the triangle is h, the base of the triangle is d, and the hypotenuse of the triangle is the length of the ramp.

Using the tangent ratio, we can write:

tanθ = opposite/adjacent

where opposite is the height of the triangle, and adjacent is the base of the triangle. Substituting the values we have, we get:

tanθ = h/d

Rearranging this formula, we can write:

θ = tan⁻¹(h/d)

Substituting the values we have, we get:θ = tan⁻¹(10/15)θ = 33.69°

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Answer:

y = 5x + 6

Step-by-step explanation:

Remember:

Parallel: The slope is the same

Perpendicular: The slope is the opposite reciprocal

If we look at the equation \(y=-\frac{1}{5}x+6\), it is in slope intercept form and its slope is -1/5. Now, we will first need to flip the fraction and get rid of the negative sign.

\(y=5x+6\)

And we are done!

Answer:

1000

Step-by-step explanation:

first you times 36 by 14 witch equals 54. Then do 54 x 20 = 1000 the 4 is gone because of the zero. So your answer should be 1000

Answer:

8/9n - 1 1/3

Step-by-step explanation:

Answer:

-43

Step-by-step explanation:

(-7) - 6(6)= -43

Answer:

C

Step-by-step explanation:

4.72×10^10

4.72×1000000000

move the point(.) ten times to your right. after first two movements

you'll have 472 remaining 8 digits to make

47200000000

Answer:

1.4 or in fraction form 7/5

Step-by-step explanation:

Hope this is what you were looking for

the average number of customers in the barbershop that a guy should expect to see is 5.

To find the average number of customers in the barbershop that a guy should expect to see, we need to calculate the average number of customers present in the system, which includes both those being served by the barber and those waiting in the queue.

Let's denote:

λ = average customer arrival rate per day = 20 customers/day

μ = average service rate per day = 60 minutes/hour / 20 minutes/customer = 3 customers/hour

Since the barber works for 8 hours a day, the average service rate per day is 8 hours * 3 customers/hour = 24 customers/day.

Using the M/M/1 queuing model, where arrival and service times follow exponential distributions, we can calculate the average number of customers in the system (including the one being served) using the following formula:

L = λ / (μ - λ)

L = 20 customers/day / (24 customers/day - 20 customers/day)

L = 20 customers/day / 4 customers/day

L = 5 customers

Therefore, the average number of customers in the barbershop that a guy should expect to see is 5.

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Answer:

D is the answer

Step-by-step explanation:

10 is multiple of 5 and 40 is the multiple of 8

50 is the multiple of 5

Please mark as brainliest answer

The experimental probability of an event is calculated by dividing the number of successful outcomes (in this case, hitting the target) by the total number of trials. In this scenario, Tom hits the target on 14 out of 20 tries. To find the experimental probability of hitting the target on his next try, we divide 14 by 20. The result can be expressed as a fraction, decimal, and percentage.

The experimental probability of hitting the target on the next try is found by dividing the number of successful outcomes (hitting the target) by the total number of trials. In this case, Tom hits the target on 14 out of 20 tries. Therefore, the experimental probability is:

Experimental probability = Number of successful outcomes / Total number of trials

                     = 14 / 20

                     = 7 / 10

The fraction 7/10 represents the experimental probability of hitting the target on the next try.

To express the experimental probability as a decimal, we divide the numerator by the denominator:

Decimal form = 7 / 10

            = 0.7

Thus, the experimental probability can be expressed as 0.7.

To convert the decimal into a percentage, we multiply the decimal by 100:

Percentage form = 0.7 * 100

               = 70%

Hence, the experimental probability of Tom hitting the target on his next try is 7/10, 0.7, or 70%.

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y = e is the equation of the tangent line to the given curve at the specified point , y = \(e^{x}\) / x , (1, e)

Through the coordinate geometry formal of point-slope form, the equation of tangent and normal can be calculated.

The tangent has the equation (y - y1) = m(x - x1), and a normal travelling through this point and perpendicular to the tangent has the equation (y - y1) = -1/m (x - x1).

thus , y' =  \(\frac{e^{x}-xe^{x} }{x^{2} }\)

y'(1) = 0 = m

Our slope is indicated by the horizontal line.

y−\(y_{1}\)=m(x−\(x_{1}\))

Our line will simply be our y-coordinate because our slope(m) is 0:

e

Therefore:

The tangent line's equation is y=e.

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To calculate the amount of money you will have per annum after investing $800 in a bank that pays a 1.25% interest rate, you can use the formula for simple interest:

Amount = Principal + (Principal * Rate)

Where:

Principal is the initial investment amount ($800 in this case)

Rate is the interest rate (1.25% or 0.0125 as a decimal)

Let's calculate the amount:

Amount = $800 + ($800 * 0.0125)

Amount = $800 + $10

Therefore, the amount of money you will have per annum after investing $800 with a 1.25% interest rate is $810.

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Answer:

The answer is D. If I have potting soil.

Step-by-step explanation:

I just took the quiz (K12) Hope this helps!