A student average 45 mph on a trip. What was the student’s speed in feet per second?

Answer:

estimate - 455

actual sum 376

Answer:

Step-by-step explanation:

Let p be the number of pennies and n be the number of nickels. As you have $8.80 in total (given that pennies are worth $0.01 and nickels are worth $0.05)

0.01p + 0.05n = 8.80

You also know that there are twice as many nickels than pennies (or alternatively, there are 2 nickels for every penny).

n = 2p

You can substitute this value of n into the first equation

0.01p + 0.05n = 8.80

0.01p + 0.05(2p) = 8.80

0.01p + 0.10p = 8.80 (multiplying out the brackets)

0.11p = 8.80 (collecting the p's)

p = 80

Putting this back into the second equation

n = 2p

n = 2(80) = 160

So there are 160 nickels and 80 pennies.

You can put this back into the first equation to check it.

0.01p + 0.05n = 8.80

0.01(80) + 0.05(160) = 0.80 + 8 =8.80

∠R= 110°, ∠U= 70°, ∠T= 110° are the missing angle measures in parallelogram RSTU.

A parallelogram is a simple quadrilateral with two pairs of parallel sides in Euclidean geometry. A parallelogram's opposite or facing sides are of equal length, and its opposite angles are of equal measure.

Because RSTU is a parallelogram, we may use parallelogram characteristics to calculate S=U=70° ( Opposite angles of parallelogram are equal).

Using the property, sum of adjacent angles is equal to 180°, therefore,

⇒∠S+∠R= 180°

⇒70°+∠R= 180°

⇒∠R= 180°- 70°

⇒∠R=110°

Also, ∠R= ∠T= 110° (Opposite angles of parallelogram are equal).

Thus, ∠R=110°, ∠T= 110° and ∠U=70°

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(-1 , 0) is the point that represents the point on the unit circle and corresponds to -π.

Option (D) is the correct one.

Given, a unit circle

and we have to mention the point on the unit circle that corresponds to -π.

As, the equation of a unit circle is

x² + y² = 1

now -π is represented by the left side of the x-axis

therefore to represent the given point we have to take a point on x-axis that will be at the left side of the origin and at the unit distance from the origin.

So, (-1 , 0) is the point that represents the point on the unit circle and corresponds to -π.

Hence, (-1 , 0) is the point that represents the point on the unit circle and corresponds to -π.

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Your question is incomplete kindly find the complete question below.

Which point on a unit circle corresponds to -π ?

(a) (1 , 0)

(a) (0 , -1)

(c) (0 , 1)

(d) (-1 , 0)

Answer:

(-1,0)

Step-by-step explanation:

I just took the quiz :)

The assumptions are- Sample of students are independent and samples are simple random samples. Distribution is normal (t distribution). The independent variable measures on interval scale.

The study and development of techniques for gathering, processing, interpreting, and presenting empirical data are within the purview of statistics, a branch of natural science. Research in stats has application in almost all scientific domains, and software concerns in the many science disciplines inspire the creation of new statistical methods and theories. Statistics is a very multidisciplinary field. Statisticians use a range of mathematical and computational techniques while creating new approaches and researching the concept that supports such methods.

Uncertainty and variation are two cornerstones of the statistical profession. In science, as well as more broadly in life, there are numerous circumstances where the result is unknown. Sometimes the uncertainty is caused by the fact that the result is still up in the air.

How to solve?

ts < tc Do not reject H0

P value > α Do not reject H0

There is insufficient data to determine that the mean scores of the two groups of pupils differ.

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There is a 1/4 probability that the family's next child will be a girl.

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true.

An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.

So, the probability that the next child born will also be a girl:

We know that:

There is a 50% chance that a female will be the only kid born.

That is: 1/2

The likelihood that the family's subsequent kid will be a girl is:

1/2 * 1/2 = 1/4

Therefore, there is a 1/4 probability that the family's next child will be a girl.

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Since the mean height of all children this age is 38 inches, the z-score is 1.282, and the child's height is 40 inches, the standard deviation of all children's heights will be 1561.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a larger range, a low standard deviation suggests that the values tend to be near to the established mean. The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation indicates that the data are grouped around the mean, whereas a high standard deviation shows that the data are more dispersed.

Here,

The z-score which separates the top 10% of a normally distributed

population is 1.282.

Since z = (x-u)/sigma

1.282 = (40-38)/sigma

sigma = 2/1.282

sigma = 1/0.641 = 1561

The standard deviation of the heights of all children of this age will be 1561 as mean is 38 inch and z-score is 1.282 as well as the height of child is 40 inch.

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Answer:

17 pennies, 14 nickels

Step-by-step explanation:

let p = pennies and n = nickels

p + n = 31 coins

p = 31 - n

0.01p + 0.05n = $0.87

0.01(31 - n) + 0.05n = 0.87

0.31 - 0.04n = 0.87

0.04n = 0.56

n = 14

p = 31 - 14

p = 17

hope this made sense :)

The amount that would be in the account in 30 years will be $245,371.

An ordinary annuity is when a series of payment is made at the end of the period over a number of years.

The formula that can be used to determine the future value of an ordinary annuity is: monthly deposit x annuity factor

Annuity factor = {[(1+r)^n] - 1} / r

Where:

$350 x (1.0033)^360 - 1} / 0.0033 = $245,371

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The total number of nickels and quarters with Veronica are 5 and 9, respectively.

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

Let the number of nickels be represented by x, while the number of quarters be represented by y.

It is known that a nickel is worth 5 cents, while a quarter is worth 25 cents. Therefore, the given statements can be written in the form of equations as,

Veronica has 4 more nickels than quarters,

x = y + 4

Coins have a combined value of 170 cents,

5x + 25y = 170

Substitute the value of x from the first equation in the second,

5x + 25y = 170

5(y + 4) + 25y = 170

5y + 20 + 25y = 170

30y = 170 - 20

30y = 150

y = 150/30

y = 5

Therefore, the number of quarters are 5.

Since, Veronica has 4 more nickels than quarters,

x = y + 4

x = 5 + 4

x = 9

Hence, the total number of nickels and quarters are 5 and 9, respectively.

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Answer:

685

Step-by-step explanation:

they would normally pay 720

but they got 35 credit

720-35 is 685

True , the null hypothesis of zero difference between the two population means cannot be rejected at a 0.10 level of significance.

Given :

f a 90% confidence interval for the difference in the two population means contains zero, then the null hypothesis of zero difference between the two population means cannot be rejected at a 0.10 level of significance.

at 10 % significance:

z score = 1.282

at 90 % confidence interval :

z score = 1.645

[tex]H_0 :[/tex] differences between population mean = 1.282

so true the null hypothesis of zero difference between the two population means cannot be rejected at a 0.10 level of significance.

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The Answer is A: 50

just remember that the line in the middle is half of the one on the outside of the triangle

The value of the expression 7x² - 2x + 2 when x = 3 is 59.

Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations. As an illustration, the expression x + y has the terms x and y with an addition operator between them.

Based on the information given, the expression is:

7x² - 2x + 2

Put x = 3

= 7x² - 2x + 2

= 7(3)² - (2 × 3) + 2

= 63 - 6 + 2

= 59

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The inequality x ≤  20 represents the all possible values of x.

Inequality shows relation between two expression which are not equal to each others.

Given that,

Kelli walks not more than 25 dogs on Mondays,

Also,

Kelli walks 5 dogs that belongs to Ms. Lincoln

The inequality to find the number of dogs Kelli walks on Monday x, in addition to Ms. Lincoln's dogs, can be written as,

x+5 ≤ 25

Subtract 5 from both the sides,

x + 5 - 5 ≤ 25 - 5

x ≤  20

The required inequality is x ≤  20.

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The amount of sugar in final recipe will be 5/8

Fractions are used to represent smaller pieces (or parts) of a whole.

Given that, You decide to subtract ⅛ of a cup of sugar from the original amount of ¾ of a cup.

3/4-1/8 = 5/8

Hence, The amount of sugar in final recipe will be 5/8

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The distance between you and your friend is changing at a rate of 20 miles per hour.

What is the Pythagorean theorem?

A right triangle's three sides are related in Euclidean geometry by the Pythagorean theorem, also known as Pythagoras' theorem. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.

Here, we

Let the east direction is denoted by x and

the north direction is denoted by y.

dx / dt = 16 miles per hour

dy / dt = 12 miles per hour

x = 4 miles

Let the distance between both the friends be s.

Time is taken by you to travel 4 miles,

time = distance / speed = 4 / 12 = 1/4 hour

Distance traveled by your friend in time t,

y = speed x time = 12 x 1/4 = 3 miles

By Using the Pythagorean theorem,

x² + y²  = s²     ..... (1)

Substitute, x = 4 mile, y = 3 mile

s²  = 16 + 9 = 25

s = 5 miles

Now, Differentiate equation (1) with respect to t, we get

2x dx/dt + 2y dy/dt = 2s ds/dt

4 (16) + 3 (12) = 5 ds/dt

ds/dt = 20 miles per hour

Hence, the distance between you and your friend is changing at a rate of 20 miles per hour.

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The total number of hours spent on reading in a week is 14/3 hours.

For the given question-

Number of hours spent of reading = 2/3 hours.

Total number of days in a week = 7.

Total number of hours spent on reading = 2/3 x 7

Total number of hours spent on reading = 14/3

Thus, the total number of hours spent on reading in a week is 14/3 hours.

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Deborah can choose from a total of 60 combinations.

Here, we are given that Deborah has two pairs of​ slacks, six ​shirts, and five sweaters.

She has to choose a pair of​ slacks, a​ shirt, and a sweater each​ day.

She can choose a pair of slacks in 2 ways

Similarly, she can choose a shirt to wear in 6 ways and a sweater in 5 ways.

Since, she wears each one of these items each day, the total number of combinations can be found by multiplying the possibilities for each item as follows-

2 × 6 × 5

= 60

Thus, Deborah can choose from a total of 60 combinations.

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The sample proportion of the business travelers who use a laptop computer on overnight trips is 0.6417.

Given:

a survey that found that 351 of 547 business travelers use a laptop computer on overnight business trips.

we are asked to find the sample proportion based on this survey, who use a laptop computer on overnight business trips = ?

sample proportion:

The sample proportion (p) indicates the percentage of people in a sample who exhibit a particular quality or attribute. Divide the number of individuals (or items) who have the desired attribute by the overall sample size to obtain the sample proportion.

P = X/N

P = 351/547

P = 0.641681

round off to four decimal places.

P = 0.6417

Hence we get the sample proportion as 0.6417

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The degrees of freedom for the F- statistic is:

(a) the degree of freedom of the numerator= 3

(b) the degree of freedom of the denominator= 58

The statistical analysis tool known as analysis of variance (ANOVA) divides the observed aggregate variability present in a data set into two categories: systematic variables and random components. The random factors have no statistical impact on the presented data set, whereas the systematic factors do.

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean".

If we assume that we have [tex]p[/tex] groups and on each group from [tex]j=1,...,p[/tex]we have [tex]n_{j}[/tex] individuals on each group we can define the following formulas of variation.

We know, we have this property

[tex]SST=SS_{between} +SS_{within}[/tex]

The degrees for the numerator are [tex]df_{num}=k-1=4-1=3[/tex], where k represents the number of groups (k = 4)

The degrees for the denominator are [tex]df_{den} =N-K=62-4=58[/tex], where N represent the total number of people (N = 14+16+19+13=62)

And the total degrees of freedom are given by:

[tex]df_{tot} =df_{num} +df_{den} =3+58=61[/tex]

Hence, degree of freedom of the numerator is 3 and the degree of freedom of the denominator is 58.

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a function that determines a string's hask key. The average position of each letter in the alphabet divided by the size of the table yields the hash key.

def char_position(char):

   alphabet = list("abcdefghijklmnopqrstuvwxyz")

   return alphabet.index(char)

def hash_key(string):

   total = 0

   for char in string.lower():

       total += char_position(char)

   return total / len(string)

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The two-column proof shown above should be completed with the following theorems:

Statements                              Reasons

ΔADB ≅ ΔCDB                             HL.

AD ≅ CD                                    CPCTC.

In Geometry, there are five (5) major types of triangle based on the length of their sides and angles, and these include the following;

In Mathematics, CPCTC is an acronym for corresponding parts of congruent triangles are congruent and it can be defined as a theorem which states that the corresponding angles and side lengths of two (2) or more triangles are congruent if they are both congruent.

By applying the corresponding parts of congruent triangles are congruent (CPCTC) theorem to triangle ABC (ΔABC), we have the following;

Statement                              Reason

AD ≅ CD                                    CPCTC.

In Mathematics, HL is an acronym for hypotenuse leg and it can be defined as a theorem which states that if the hypotenuse and one (1) leg in a right-angled triangle are congruent to the hypotenuse and leg of another right-angled triangle, then the two (2) triangles would be congruent i.e ΔADB ≅ ΔCDB.

By applying the hypotenuse leg (HL) theorem to triangle ABC (ΔABC), we have the following;

Statement                              Reason

ΔADB ≅ ΔCDB                             HL.

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Answer:

85 sociology books

255 history books

Step-by-step explanation:

h = history textbooks

s = sociology textbooks

h + s = 340

h = 3s

3s + s = 340

4s = 340

s = 85

h = 3s = 3(85) = 255

Answer:

255 history textbooks

85 sociology textbooks

Step-by-step explanation:

Define the variables:

Given information:

Create a system of equations with the given information and defined variables:

[tex]\begin{cases}x+y=340\\\;\;\;\:\:\:\:x=3y\end{aligned}[/tex]

Substitute the second equation into the first equation and solve for y:

[tex]\implies 3y+y=340[/tex]

[tex]\implies 4y=340[/tex]

[tex]\implies y=340 \div 4[/tex]

[tex]\implies y=85[/tex]

Substitute the found value of y into the second equation and solve x:

[tex]\implies x=3 \times 85[/tex]

[tex]\implies x=255[/tex]

Therefore, the number of each type of textbooks sold were:

The radius of the circle will be 4.6m.

What is area of a circle?

The measurement of the circle's boundaries is called as the circumference or perimeter of the circle. whereas the circumference of a circle determines the space it occupies. The circumference of a circle is its length when it is opened up and drawn as a straight line. Units like cm or unit m are typically used to measure it. The circle's radius is considered while calculating the circumference of the circle using the formula. As a result, in order to calculate the circle's perimeter, we must know the radius or diameter value. The area of the circle will be A = [tex]\pi r^{2}[/tex].

The area of the circle given is = 15 m²

Sector of a circle with a central angle of 5π/11 rad

The area will be (1/2) * r² * Ф

15 = (1/2) * r² * (5π/11)

⇒r² = 30 * (11/5π)

⇒r² = 21.00

⇒r=4.6m

Hence, the radius of the circle will be 4.6m.

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Answer: 18°

Step-by-step explanation:

     The question doesn’t state where F is in relation to A, B or E, so we have to guess. Here are two guesses.

If ABF is a straight line then ∠ABE+∠EBF=180, so 2n+7+4n-13=180, 6n-6=180.

Divide each side by 6: n-1=30 so n=31 and m∠ABE=2n+7=2×31+7=62+7=69°.

If BF bisects ∠ABE, then ∠ABE=2×∠EBF, so 2n+7=2(4n-13)=8n-26. So 6n=33 and, dividing both sides by 3: 2n=11. Therefore m∠ABE=2n+7=11+7=18°.

The best interpretation of the mean of X is in the long run, a player will lose an average of $0.15 per carnival game played.

The average of the specified collection of numbers is what is referred to as mean. It indicates a data set's values are distributed equally.

Given:

Amount =      $1        $1       $10

Probability = 0.80    0.15    0.05

In mathematics and statistics, the arithmetic mean is the sum of a set of integers divided by the total number of the numbers in the set. When the context is clear, it is also referred to as the mean or average. A set of experiments or survey findings are typically included in the collection.

Hence, the correct option is (A) In the long run, a player will lose an average of $0.15 per carnival game played.

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Answer:

4/5

Step-by-step explanation:

The two points are (5, 7) and (-5, -1). The slope is the difference of y over the difference in x, or [tex](7--1)/(5--5)[/tex]. This simplifies to 8/10, or 4/5.

Answer:

b=-3

Step-by-step explanation:

11=2b+17

subtract 11 from both sides

then you get 2b+6=0

so b=-3

Answer: -3

Step-by-step explanation:

Hey! Here's a simple solution -

Step 1 - Subtract 17 from both sides -

11 - 17 = 2B + 17-17

-6 = 2B

Step 2 - Divide both sides by 2

-3 = B

Hope this helped you! Peace out!