Find:

11/3÷2/3

the question is five and

Answers

Answer 1

Answer:

[tex]\dfrac{11}{2}[/tex] or [tex]5 \, \dfrac{1}{2}[/tex]

Step-by-step explanation:

Division of fractions can be represented as multiplication by one of the fractions' reciprocal. (Skip, Flip, and Multiply)

So,

[tex]\dfrac{11}{3} \div \dfrac{2}{3} = \dfrac{11}{3} \times \dfrac{3}{2}[/tex]

And we can simplify this to:

[tex]\dfrac{11}{2}[/tex] or [tex]5 \, \dfrac{1}{2}[/tex]


Related Questions

can you help me find the points for this question? And how to solve it?

Answers

The line segment has a length of 13 units. (Correct choice: D)

How to determine the length of a line segment

According to Euclidean geometry, any line can be constructed by the locations of two distinct points on Cartesian plane. In this question we must determine the length of the line segment by means of Pythagorean theorem, whose formula is shown below:

l = √(x² + y²)

Where:

l - Length of the line segment.x - Horizontal length of the line segment.y - Vertical length of the line segment.

First, determine the horizontal and vertical lengths of the line segment:

x = 12, y = 5

Second, determine the length of the line segment:

l = √(12² + 5²)

l = √169

l = 13

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Use elimination to solve the equations

1. x - 2y = 4
-x + y = -2

2. -x + y = 3
3x + y = 11

3. -4x - 2y = -12
4x + 8y = -24

Answers

Answer:

Step-by-step explanation:

1. x=5

2. xy7

Select all the prime numbers.
3
9
13
23
33​

Answers

Answer:

Prime Numbers: 3,13,23,33

Composite Number: 9

Step-by-step explanation:

If a number has only 2 factors 1 and itself, then the number is prime

if you have string of length 50 cm, what are the dimension
of the rectangle of maximum area that you can enclose with your string?
expline your reasoning. what about string of length K cm?

Answers

The dimension of the rectangle of maximum area that you can enclose with the string is 12.5 x 12.5

n let x = the length of one side of the rectangle and y = the length of the other side of the rectangle.

The area is:

A = xy

and the perimetere is the string of length 50 cm

50 = 2(x + y) Solve this in terms of y. Divide both sides by 2.

25 = x + y By Subtract x from both sides.

25-x = y Now substitute this into the equation for the area.

A = x (25 - x) Simplify.

A = 25x - x²

the general form of quadratic equation: ax² + bx + c

x is given by -b/2a

Here the equation is A = -x² + 25x

, a = -1, b = 25, and c = 0

so we can find the x-coordinate of the vertex by -25/2(-1) = 12.5

So the length (x) of the rectangle must be 12.5 cm to get the maximum area.

But what about the width (y)?

Since the perimeter is 50 cm and this is twice the (length + width), the (length + width) is 25 cm, so the width is 25 cm - the length.

x + y = 25

12.5 + y = 25

y = 12.5

So, we end up with x (the length) = 12.5 cm and y (the width) = 12.5 cm.

And this, of course, is a square whose sides are 12.5 cm

If the perimeter were k cm,

2(x + y) = k

x + y = k/2

x + x = k/2 (as x = y)

x = k/4

x = k/4, y = k/4

Therefore,  the dimension of the rectangle of maximum area that you can enclose with the string is 12.5 x 12.5

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Which of these relations is a function?

Answers

Graph D is a function because it passes the vertical line test

Vertical Line Test

A vertical line test helps to find if the graph is a function or not. The vertical line in a coordinate system represents a set of infinite points having the same x coordinate values and different y coordinate values for each of its points. The vertical line is drawn parallel to the y-axis, if it cuts the curve at one distinct point then it has one y-value for the given x value and it follows the basic definition of a function.

Applying the vertical line test in the graphs given, only graph D is a function.

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an electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with a standard deviation of 40 hours. how large a sample is needed if we wish to be 96% confident that our sample mean will be within 10 hours of the true mean?

Answers

A sample of at least 68 bulbs is needed to be 96% confident that our sample mean will be within 10 hours of the true mean.

What do you mean by sampling?

Sampling is the process of choosing the group from which you will actually collect data for your study. For instance, you could interview a sample of 100 students if you were examining the viewpoints of students at your university. With the help of sampling, you can test a statistical hypothesis on the features of a population.

According to the question,

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha =\frac{1-0.96}{2} =0.02[/tex]

Now, we have to find z in the Z table as such z has a p value of [tex]1-\alpha[/tex].

So it is z with a p value of [tex]1-0.02=0.98[/tex], so z= 2.055

Now, find the margin M as such

M = z*σ/√n

In which σ is the standard deviation of the population and n is the size of the sample.

In this problem, we have that:

σ = 40, M = 10,

M = z*σ/√n

[tex]10=2.055*\frac{40}{\sqrt{n} } \\10\sqrt{n}=82.2\\ \sqrt{n}=8.22\\ n=67.6[/tex]

Therefore, a sample of at least 68 bulbs is needed to be 96% confident that our sample mean will be within 10 hours of the true mean.

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Sadio tart with aving of £15. Thoma tart with no aving. Each week from now,
Sadio will ave £3. 50 and Thoma will ave £3
in how many week will Sadio and Thoma have aving in the ratio 2:1?

Answers

In total 6 weeks, the saved money by both Sadio and Thoma will be in the ratio of 2:1.

Define the term ratios?When two or so more numbers are compared, the ratio shows how big one is in relation to the other. The dividend and number being divided is referred to as the antecedent, and the divisor for number that also is dividing is referred to as the consequent. A ratio compares two numbers by division.

For the given question.

Initial money owned by each is-

Sadio = $15

Thoma = $0.

Let the number of weeks passed be 'x'.

Then, present money after x weeks.

Sadio = $3.50x + 15

Thoma = $3x

The number of weeks , when ratio becomes 2:1

(3.50x + 15)/3x = 2/1

3.50x + 15 = 6x

6x - 3.5x = 15

x = 15/2.5

x = 6

Thus, in total 6 weeks, the money held by both Sadio and Thoma will be in the ratio of 2:1.

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explain how the is related to the standard error of the estimated difference in average birth weight for smoking and nonsmoking mothers.

Answers

The average birthweight of a nonsmoker was between 1,000 and 5,000 grams. Babies born to smokers frequently weighed between 500 and 4500 grams.

Given,

What is the newborn's weight?

A newborn's body weight is referred to as birth weight. At birth, babies of European descent typically weigh between 2.5 and 4.5 kilograms, or about 3.5 kilograms on average. South Asian and Chinese babies typically weigh 3.26 kg.

Here,

Babies born to nonsmokers typically weighed between 1,000 and 5,000 grams. Babies of smokers typically ranged in weight from 500 to 4500 grams.

However, there are some obvious disparities between the two groups' typical ranges of birth weights. Since there are fewer newborns in the lower weight groups, over half of neonates among nonsmokers (56 out of 115, 48.7%) had birth weights between 3,000 and 4,000 grams. Less infants are born in the heavier weight categories; 40 of the 74 newborns delivered to smokers, or 54% of them, had birth weights between 2,000 and 3,000 grams.

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Please help!!
(A) Prove that the opposite sides of the rectangle are congruent.

(B) Prove the diagonals of your rectangle are congruent.

(C) Using the slopes for each side, prove there are 4 right angles on the rectangle.

**Please Show All Work**
Use Distance Formula: v(x2 - x1)^2 + (y2 - y1)^2

Answers

The parameters of the rectangle in the question  can be presented as follows;

(A) The lengths of the opposite sides found using Pythagorean Theorem are the same, therefore, the opposite sides of the rectangle are congruent

(B) The lengths of the diagonals of the rectangle are both 5·√2, therefore, the diagonals are congruent

(C) The slopes of the sides of the rectangle are 1/3 and -3, therefore, the sides are perpendicular, and the and the re are 4 right angles on the rectangle.

What is a rectangle?

A rectangle is a quadrilateral that has congruent opposite sides and each of the 4 interior angles of the rectangle are right angles.

(A) The lengths of the sides of the  rectangle are;

Top side; √(6² + 2²)

Opposite to the top √(6² + 2²)

Left side; √(3² + 1²)

Right side; √(3² + 1²)

The lengths of the opposite side are the same

Therefore;

The opposite sides are congruent

(B) The lengths of the diagonals are as follows;

Length of first diagonal=  √((2 - 1)² + (1 - 8)²) = √(1² + 7²) = √(50) = 5·√2

Length of the second diagonal = √((4 - (-1)² + (7 - 2)²) = √(50) = 5·√2

The length of the first and second diagonal are the same, therefore, the diagonals of the rectangle are congruent.

(C), Slope of the top side = (4 - 2)/(7 - 1) = 2/6 = 1/3

Slope of the opposite to the top side = (1 - (-1))/(8 - 2) = 1/3

Slope of the left side = (2 - (-1))/(1 - 2) = -3

Slope of the right side = (4 - 1)/(7 - 8) = -3

The slope of the top side are the negative inverse of the slope of the left and right sides of rectangle

Therefore, the sides of the rectangle are perpendicular, and the rectangle consists of 4 right angles

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due today can someone help

Answers

Answer:

v = 15

Step-by-step explanation:

By exterior angle theorem:

9v° = 31° + (4v + 44)°

9v° = (4v + 44 + 31)°

9v = 4v + 75

9v - 4v = 75

5v = 75

v = 75/5

v = 15

PLEASE I NEED HELP I WILL GIVE YOU BRAINLIEST
in the graph of the inequality x-2y (less than or equal too) 4, which is a value for x on the boundary line and the x axis
4
-2
2
-4

Answers

The value of x on the boundary line and the x axis is found as 4.

Explain the term inequality?In mathematics, "inequality" refers to a relationship among two expressions and values that is not equivalent to each other. Therefore, inequality emerges from a lack of balance.When two components are equal, we use the sign "=," and if they are not equal, we use the symbol "," which stands for "not equal."

For the given question,

The graph of inequality  x-2y ≤ 4 is drawn.

Consider the graph,

The straight lien formed by the graph touches the x coordinate axis at (4,0).

Thus, the value of x on the boundary line and the x axis is found as 4.

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approximately what percentage training hours are delivered online? group of answer choices 40% 30% 10% 20%

Answers

The approximate percentage training hours are delivered online is 30%

What is percentage ?

A percentage in mathematics is a figure or ratio that is stated as a fraction of 100. The abbreviations "pct.", "pct.", and occasionally "pc" are also used to indicate it, while the percent symbol, "%," is most frequently employed. A % has no dimensions and no standard measurement.

10%, a comparative figure denoting one hundredth of any quantity. One percent (symbolized as 1%), being the hundredth component, is represented as 100 percent, while 200 percent signifies twice the amount specified.

Calculating a percentage involves dividing an item by its sum and multiplying the result by 100. (Value/Total Value)100% is the formula used to calculate percentages.

The amount of hours remitted online are 25.6% in 2018 reports

It has reduced from last year , it has been reported 28.6% in 2017 and 30.4% in 2016

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Factorise the following: a) x² + 6x + 8 b) x²-9x + 18 c) x² - 8x-9 d) x² + 6x-27​

Answers

a) To factorize this expression, we need to find two numbers that multiply to give 8 and add to give 6. The two numbers that fit this description are 4 and 2, so we can write the expression as x² + 6x + 8 = (x + 4)(x + 2).

b) To factorize this expression, we need to find two numbers that multiply to give 18 and add to give -9. The two numbers that fit this description are -6 and -3, so we can write the expression as x²-9x + 18 = (x - 6)(x - 3).

c) To factorize this expression, we need to find two numbers that multiply to give -9 and add to give -8. The two numbers that fit this description are -3 and 3, so we can write the expression as x² - 8x-9 = (x - 3)(x + 3).

d) To factorize this expression, we need to find two numbers that multiply to give -27 and add to give 6. The two numbers that fit this description are -9 and 3, so we can write the expression as x² + 6x-27 = (x + 9)(x - 3).

You have $10,000 to invest in a stock portfolio. Your choices are Stock X with an expected return of 13 percent and Stock Y with an expected return of 8 percent. Your goal is to create a portfolio with an expected return of 12.4 percent. All money must be invested. How much will you invest in stock X? A. $800B. $1,200C. $4,600D. $8,800E. $9,200

Answers

The money invested in stock X is $8,800.

Given,

Total investment in stock portfolio=$10000

Expected return from stock X=13%=0.13

Expected return from stock Y=8%=0.08

Expected return from portfolio=12.4%=0.124

The portfolio return is calculated by taking the weighted average of individual stock returns.

Let x represent the portfolio weightage of stock X.

1-x is the portfolio weightage of stock Y.

money invested in stock X be

0.124=0.13x+0.08(1-x)

0.124=0.13x+0.08-0.08x

0.124-0.08=0.05x

0.044=0.05x

x=0.88

money invested in stock X=0.88*10000=$8800

Thus, the money invested in stock X is $8,800.

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judy selected ten states and then calculated statistics on them. which statement best describes the resulting statistics?

Answers

The statement best describing is only statistics for the ten states are reported

The study of statistics focuses on gathering, organizing, organizing, analyzing, interpreting, and presenting data. Statistics can be used to make future predictions calculate the likelihood that a given event will occur, or provide information about a survey. It primarily serves to convey knowledge, compute probabilities, and store records. In essence, it improves our understanding of the world by using numbers and other quantitative data.

In the given case, a total of ten states were selected by Judy and then the statical analysis was made. As per the given options, the correct option is that only statistics for the ten states are reported. This is because the number of terms, which are the states is ten.

Complete Question

Judy selected ten states and then calculated statistics on them. Which statement best describes the resulting statistics?

Only statistics for the ten states are reported.

No statistics are reported.

Statistics for all fifty U.S. states are reported.

The number of states included in the report depends on whether an attribute, interactive or spatial query was used to make the selection.

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Determine the degree measure of one angle of a 36-sided regular polygon. 170° 180° 6,120° 6,480°

Answers

Answer:

170 Degrees.

Step-by-step explanation:

If an interior angle is 170 degrees, that's your best bet.

Your team has 17 kickballs to store in baskets.
Each basket can hold 5 kickballs.
How many baskets do you need to store all the kickballs?

Answers

Answer:

85baskets

Step-by-step explanation:

17*5=85 baskets,if each basket hold 5kickballs 17*5.

true or false: when two variables are highly correlated, a change in the value of one will cause a change in the value of another.

Answers

It is false that when two variables are highly correlated, a change in the value of one will cause a change in the value of another.

What is the variable of an equation?

An amount that can fluctuate depending on the mathematical issue is referred to as a variable. The generic letters x, y, and z are frequently employed in mathematical expressions and equations. A variable, then, is a symbol denoting a number whose value is unknown. In this case, x + 5 = 10. "X" in this case is a variable.

The fact that two variables are correlated does not mean that one causes the other.

False

If there is a causal relationship between two variables, then variables are correlated but it is not always true that if variables are correlated then there is a causal relationship.

Hence, it is false that when two variables are highly correlated, a change in the value of one will cause a change in the value of another.

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when a truckload of apples arrives at a packing plant, a random sample of 150 is selected and examined for bruises, discolouration, and other defects. the whole truckload will be rejected if more than 5% of the sample is unsatisfactory. suppose that 8% of the apples on the truck do not meet the desired standard. what is the probability that the shipment will be accepted anyway? remember to check if the sample size is large enough!

Answers

The probability that the shipment will be accepted anyway is 0.0885.

Given,

In the question:

A random sample of 150 is selected and examined for bruises, discoloration, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Suppose that 8% of the apples on the truck do not meet the desired standard.

To find the probability that the shipment will be accepted anyway.

Now, According to the question:

The sample size, n = 150.

The population proportion, p = 0.08.

The shipment is accepted of the sample proportion is less than 5%.

Now, to find the required probability the listed conditions to verified.

Randomization: It was stated that a random sample is chosen.

Independence: It can be supposed that the fact that a sample is satisfactory is independent of the other apple's condition.

10% condition: It can be supposed that the population size is larger than 150 (sample size).

Normality: This condition requires that np and n (1 − p) must be at least 10, so it can be verified as,

np = (150 x 0.08)

np = 12 [tex]\geq[/tex] 10

The mean of the sample proportion can be estimated as:

μ[tex]_p[/tex] = p

    = 0.08

Similarly, The standard deviation of the sample proportion can be estimated as:

σ[tex]_p[/tex] = [tex]\sqrt{\frac{p(1-p)}{n} }[/tex]

    =  [tex]\sqrt{\frac{0.08(1-0.08)}{150} }[/tex]

    =  0.02215

Thus, the sampling distribution of sample proportion can be approximated as,

p ~ N(0.08 ~ 0.0222)

The required probability is given as:

P(p < 0.05) = P (p - μ[tex]_p[/tex] /σ[tex]_p[/tex]  < 0.05 - 0.08/ 0.0222)

                  = P(Z < -1.35)

                 = 1 - P (Z < 1.35)

                  = 0.0885

Note: The probability value corresponding to the Z score is obtained from the unit normal table.

Thus, the probability that the shipment will be accepted anyway is 0.0885.

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a bin contains 4 items: 1 a, 1 b, 2 c and 6 d. a person randomly selects 3. how many different types of items will be selected

Answers

Using combinations, we know that 4 different types of items will be selected.

What are combinations?

Combinations are mathematical operations that count the number of potential configurations for a set of elements when the order of the selection is irrelevant.

We can choose the components of combos in any order.

Permutations and combinations can be mixed up.

Combination formula: [tex]n C r=\frac{n !}{(n-r) ! r !}[/tex]

So, this formula, commonly known as the NCR formula, determines the number of combinations that may be made with r items out of the n available options.

We, therefore, have 4 objects, and a person chooses 3 at random.

[tex]\begin{aligned}& n C r=(n, r)=(4,3) \\& =\frac{4 !}{3 !(4-3) !} \\& =4 ! / 3 ! \\& =4\end{aligned}[/tex]

Therefore, using combinations, we know that 4 different types of items will be selected.

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The probability that a marksman will hit a target each time he shoots is 0. 89. If he fires 15 times, what is the probability that he hits the target at most 13 times?.

Answers

Answer:

Step-by-step explanation:

Correct option is A)

An earthquake near the Fiji Islands measured 4.6 on the Richter scale. Use the formula R = log() to determine
approximately how many times stronger the wave amplitude A of the earthquake was than Ao.
OA 39, 811 Ao
O A≈ 99.5A0
O A 183, 129 Ao
O A≈ 0.66A0

Answers

The correct option regarding how many times stronger the wave amplitude A of the earthquake was than the standard wave Ao is given by:

A = 39,811 Ao.

How to obtain the ratio of A and Ao?

To find the ratio of A and Ao, which states how many times a earthquake measuring R in the Richter scale was stronger than the standard intensity Ao, we have to solve the following logarithmic function:

R = log(A/Ao)

The Richter scale of the earthquake in this problem is given as follows:

R = 4.6.

Hence the ratio of the measures is obtained as follows:

4.6 = log(A/Ao)

The power of 10 is the inverse function of the logarithm, hence if it is applied to both sides of the equation, then we can isolate the ratio A/Ao as follows:

A/Ao = 10^4.6

A/Ao = 39,811.

Applying cross multiplication, the ratio is given as follows:

A = 39,811 Ao.

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back to assignment attempts keep the highest no score out of 2/ 2 10. missing data which of the following are valid reasons for why there may be missing data in a well-designed study? check all that apply. some respondents didn’t know the answer to the question. some respondents refused to answer the question. data for some respondents were lost or misrecorded. researchers always have access to all values of all variables in the data set of a well-designed study. why might eliminating respondents with missing data compromise the results of a study? a random sample may no longer be random if you eliminate some members of the sample. statistical software is not equipped to handle eliminating responses. continue without saving

Answers

There may be missing data in a well-designed study because some respondents didn’t know the answer to the question, some respondents refused to answer the question and data for some respondents were lost or misrecorded. A random sample may no longer be random if you eliminate some members of the sample so eliminating might respondents with missing data compromise the results of a study

The first question is:

Missing data which of the following are valid reasons for why there may be missing data in a well-designed study? check all that apply.

some respondents didn’t know the answer to the question. some respondents refused to answer the question. data for some respondents were lost or misrecorded. researchers always have access to all values of all variables in the data set of a well-designed study.

The option 1, 2 and 3 may be possible reasons.

It is possible that some respondants did not know the answer of the question. Because it is not neccesary that every respondants know the answer of the quesions that are asked. So they can provide the wrong data and also not give the answer.

Some may refuse to answer because they don't want to answer or may be it is deficult to answer of those questions.

It may also possible that the the record were lost or misrecorded. Because there is lot of data that they have to organize and also possible there have many same detalis in the respondants that leads to the misrecoding.

The second question is:

Why might eliminating respondents with missing data compromise the results of a study?

a random sample may no longer be random if you eliminate some members of the sample. statistical software is not equipped to handle eliminating responses. continue without saving

If we eliminate a random sample then it is possible that the data may be biased and didn't involve the all factors. So it leads to wrong result and may harm the all process. So it directly effect the result of a study.

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A.) 5/4
B.) 1/2
C.) -5
D.) 3

Answers

Answer: A

Step-by-step explanation:

4y=5x-16

divide each side by 4

y=5/4x-4

Answer:

Step-by-step explanation:

5/4 is the answer

cause you add =4y to other side and -16 to left side

divide by 4 on both sides to get

5/4x -4 = y

peter pan is studying the migration patterns of pixies. as part of this research, he counts the number of pixies over mermaid lagoon on 16 randomly selected days. what is the sample of this study?

Answers

For given study the sample would be - The number of pixies over Mermaid Lagoon on the 16 days observed.

Here, peter pan is studying the migration patterns of pixies. as part of this research, he counts the number of pixies over mermaid lagoon on 16 randomly selected days.

We need to find the sample of this study.

We know that, a sample is nothing but a group of elements chosen from the population. It is a small data set that you obtain from a larger set of data to represent the population.

In this case ths sample would be - The number of pixies over Mermaid Lagoon on the 16 days observed.

Therefore, sample for this situation - The number of pixies over Mermaid Lagoon on the 16 days observed.

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The options for given question:

1) The number of pixies over Mermaid Lagoon on the 16 days observed.

2) Peter Pan

3) The number of pixies in Neverland

4) The number of pixies over Mermaid Lagoon on any day.

Please answer quickly :) If wrong i will report

Answers

Answer:

(0,2)

Step-by-step explanation:

plug in 0 for x

scores from the sit and reach test weren't normally distributed. what is the likely cause for this lack of normal distribution?

Answers

A normal distribution can appear utterly erratic due to a lack of data. Results from tests taken in class, for instance, are often regularly distributed.

Given information;

Scores from the sit and reach test weren't normally distributed.

To find what is the likely cause for this lack of normal distribution,

⇒ A normal distribution can appear utterly dispersed due to Insufficient Data. For instance, test scores in the classroom are often regularly distributed.

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What does the equation look like after you combine like terms?

−3x + 2 − 4x = 16


7x+2=16

x+2=16

−x+2=16

−7x+2=16

Answers

Answer:

it'll look like the last one -7x + 2 = 16

-3x + 2 - 4x = 16
-7x + 2 = 16 because the only like terms on the left side of the equation are -3x and -4x which when combined make -7x.

one morning, ms. simon drove directly from her home to her workplace in 242424 minutes. what was her average speed, in miles per hour, during her drive that morning?

Answers

The average speed in miles per hour during her drive that morning is 43.5 miles per hour   .

In the question ,

it is given that ,

the distance between home to freeway entrance is = 0.6 miles

the distance between freeway entrance to freeway exit is = 15.4 miles

the distance between freeway exit to workplace is = 1.4 miles

So , the distance from home to work place = 0.6 + 15.4 + 1.4 = 17.4 miles

we know that 24 minutes = 24/60 = 0.4 hours ,

the average speed = total  distance / total time

= 17.4/0.4

= 43.5 miles per hour

Therefore , the average speed is 43.5 miles per hour .

The given question is incomplete , the complete question is

One morning, Ms. Simon drove directly from her home to her workplace in 24 minutes. what was her average speed, in miles per hour, during her drive that morning ?

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A final exam in Math 160 has a mean of 73 with standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is greater than 78. A) 0.0103 B) 0.0008 C) 0.8962 D) 0.0036

Answers

The probability that the mean of their test scores is greater than 78 is 0.0301.

Given,

Mean = 73

Standard Deviation σ = 7.8

Number of students randomly selected = 24

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.

For an experiment having 'n' number of outcomes, the number of favorable outcomes can be denoted by x.

The formula to calculate the probability of an event is as follows.

Probability(Event) = Favorable Outcomes/Total Outcomes = x/n

The number of standard deviations from the mean is called the z - score and can be found by the formula

Z = (x - μ)/σ.

Z = (70 - 73)/(7.8/√24) = -1.88442228

P(z < -1.88) = 0.0301

Therefore, P(z < -1.88) = 0.0301

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