Which of the following is equivalent to the expression below?
3(5-2i)
Answer: 15 - 6i
Step-by-step explanation:
3(5-2i)
3×5+3×(−2i)
Do the multiplications.
15−6i
(7 points + 1 point BONUS) A new advertising program involves placing small screens on the back of taxi front seats in order to run several advertisements continuously. The theory is that riders give their undivided attention to these ads during the entire trip. To understand the potential of the advertising program, advertisers would like to first learn about the length of time of taxi rides. Random samples of the taxi ride times in minutes) in two cities were obtained. Please assume that the distributions are normal. The summary data are given in the following table. You will not need to use the information from all the rows. Please provide three decimal places for all work and answers unless explicity mentioned otherwise. Length of Taxi Ride (minutes) San Diego Phoenix San Diego - Phoenix 25 25 25 20.32 15.17 5.15 6.191 5.773 8.109
a) Should this situation be analyzed via a two-sample independent or two-sample paired method? Please explain the correct answer. If this is a paired situation, please state the common characteristic that makes these data paired.
This situation should be analyzed using a two-sample independent method. The two-sample independent method is used when comparing two independent groups, in this case, taxi ride times in San Diego and Phoenix. The two-sample paired method is used when comparing the same group under two different conditions, which is not the case here, as the taxi ride times are taken from two separate cities. There is no common characteristic that makes these data paired.
A two-sample independent method is used to compare the means of two independent populations, which is appropriate for this situation. The independent samples t-test is a common statistical test used to compare the means of two independent populations.On the other hand, if the data were obtained from the same set of taxis in both cities or from the same set of riders in both cities, then the situation would be a paired situation, and a two-sample paired method would be more appropriate.Paired data refers to data that is collected from the same sample, subject, or group at different points in time or under different conditions. For example, if the data were obtained from the same set of taxis in both cities, then the data would be paired because each taxi in San Diego would have a corresponding taxi in Phoenix. Similarly, if the data were obtained from the same set of riders in both cities, then the data would be paired because each rider in San Diego would have a corresponding rider in Phoenix.In summary, since the data in this situation were obtained from two different cities, a two-sample independent method is appropriate. If the data were obtained from the same set of taxis or riders in both cities, a two-sample paired method would be appropriate.
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to raise money, a physics club sells tickets to a physics demo extravaganza. the tickets cost $6 for adults over 18 and $4 for younglings. after the show, they have raked in a total of $438 from the 82 people who came. how many adults and how many younglings attended?
There are 55 adults and 27 younglings attended the club.
let the number of adults attended the club be x
let the number of younglings attended the club be y
total people attended the club = 82
so,
x + y = 82.....[1]
cost for the adult = $6
cost for the younglings = $4
so total amount collected = $438
so, equation formed is ,
6x + 4y = 438.......[2]
from equation [1]
x + y = 82
x = 82 - y
put this in equation [2]
6(82 - y) + 4y = 438
492 - 6y + 4y = 438
492 - 2y = 438
492 - 438 = 2y
2y = 54
y = 27
put this value in equation [1]
x + y = 82
x + 27 = 82
x = 82 - 27
x = 55
so, there are 55 adults and 27 younglings attended the club.
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will give crown
2x2=x/273x8=
Answer:
-193 is correct.
3(5x + 7) = 30 + 15x how many solutions
Answer:
No solution
Step-by-step explanation:
3(5x+7) = 30 + 15x
DISTRIBUTE
15x+21 = 30+15x
15x-15x = 0
So no solution
Answer:
Zero solutions
Step-by-step explanation:
3(5x + 7) = 30 + 15x, Use the distributive property
15x + 21 = 30 + 15x, The 15x from both sides cancel each other out
21 ≠ 30 No matter what value of x is, 21 will never equal 30
What is the slope of the line shown?
Answer:
-2
Step-by-step explanation:
down 4 over 2 meaning it's negative; simplify
Help please I would really appreciate it
Answer:
B
Step-by-step explanation:
AB=6 therefore Pto Q should be 6
6^2=36
8^2=64
add them together
=100
square root 100=10
divide by 2=5
determine which point from the specified set satisfies the system of equations. y=3x−3 and y=−x 2
There are two points that satisfy the system of equations:
(0.79, 0.37)
(-3.79, -12.37)
The system of equations is:
y = 3x - 3
y = -x^2
To determine which point from a specified set satisfies the system of equations, we need to find the values of x and y that satisfy both equations simultaneously.
Substituting y = 3x - 3 into the second equation, we get:
3x - 3 = -x^2
Rearranging this equation, we get:
x^2 + 3x - 3 = 0
Using the quadratic formula, we can solve for x:
x = (-3 ± sqrt(3^2 - 41(-3))) / (2*1) = (-3 ± sqrt(21)) / 2
Therefore, there are two possible values of x that satisfy the system of equations:
x = (-3 + sqrt(21)) / 2 ≈ 0.79
x = (-3 - sqrt(21)) / 2 ≈ -3.79
To find the corresponding values of y, we can substitute these values of x into either equation. For example, if we use y = 3x - 3, we get:
y ≈ 0.37 (when x ≈ 0.79)
y ≈ -12.37 (when x ≈ -3.79)
Therefore, there are two points that satisfy the system of equations:
(0.79, 0.37)
(-3.79, -12.37)
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classify the quadrilateral by its most specific name. then find the missing angle measure(s)
The specific name of the quadrilateral is trapezoid
The measure of the missing angle is 55 degrees
How to determine the valueTo determine the measure of the angle, we need to know the following;
The properties of a trapezoid are listed as;
The bases are parallel to each other.Opposite sides of a trapezoid (isosceles) are of the same length.Angles next to each other sum up to 180 degreesThe median is parallel to both the bases.Median's length is the average of both the basesFrom the information given, we have that;
125 + x = 180
collect the like terms, we have;
x = 180 - 125
subtract the values, we get;
x = 55 degrees
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Find the volume of the cylinder whose base area is (4x)^2 and height is (5x)^2.
Answer:
the volume of the cylinder is 41x^3
Step-by-step explanation:
The computation of the volume of the cylinder is shown below:
As we know that
The Volume of the cylinder is
= base × height
= (4x)^2 + (5x)^2
=16x^2 + 25x^2
= 41x^3
Hence, the volume of the cylinder is 41x^3
Given three points A(-7, 1), B(m, 6) and P(-1, n). If the point P divides AB internally in the ratio of 3: 2, find the values of m and n.
Answer:
m = 3 , n = 4
Step-by-step explanation:
Using Section Formula.
\(If \ the \ line \ segment \ AB \ where \ A = (x _1, y_1) \ and \ B = (x_2, y_2) \ divided \ by \ P =(x , y) \ in \ the \ ratio \ a : b,\\\\Then \ the \ points \ of \ P \ \\\\x = \frac{ax_2 + bx_1}{a+b} \ and \ y = \frac{ay_2 + by_1}{a+b}\)
\(Here (x_1 , y_ 1 ) = ( -7 , 1 ) \ and \ (x_ 2 , y _ 2 ) = (m , 6)\\\\ratio\ a:b = 3 : 2\\\\Therefore, P (x, y) \\\\x = \frac{3m + (2\times -7)}{5} \ \ \ \ \ \ \ \ \ \ \ [ \ x = -1 \ ] \\\\-1 = \frac{3m - 14}{5}\\\\- 5 = 3m - 14\\\\-5 + 14 = 3m\\\\9 = 3m \\\\m = 3\)
\(y =\frac{3\times 6 + 2 \times 1}{5}\\\\n = \frac{18 + 2}{5} = \frac{20}{5} = 4\)
What is the value of t?
t = 180 - 66 - 57 = 57°
How many gallons of water is being filled each minute? (8th Math)
To determine how many gallons of water are being filled each minute, you will need some more information, such as the total gallons of water being filled and the total time it takes to fill it.
Once you have that information, you can use the following steps to find the answer:
1. Write down the total gallons of water (let's call it G) and the total time in minutes (let's call it M).
2. Divide the total gallons of water (G) by the total time in minutes (M) to find the gallons filled per minute.
For example, if you are filling a pool with 120 gallons of water and it takes 20 minutes to fill it completely, the calculation would be:
Gallons per minute = 120 gallons / 20 minutes = 6 gallons per minute
So, in this example, 6 gallons of water are being filled each minute.
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Please help me with this question
Answer:
C
180(.6) because 40% off is 0.4 and what is left over is 60% or 0.6. When you multiply this you get 108. 5% sales tax is a 5% increase, so multiple 108(1.05) and you get $113.40.
Suppose Eric and Isaac both drive the same car, and have the same
deductible for car insurance. If Eric is five years younger, who is most likely to
pay a higher annual premium?
O
A. Isaac
O
B. Neither, they pay the same.
O
C. Can't tell from the information given
O
D. Eric
Answer:
eric
Step-by-step explanation:
just took the test
A right triangle has one side that is 6 inches long and a second side that is 8 inches long, what is the length of the hypotenuse?
HELP ME OUT PLEASE
Answer:
10
Step-by-step explanation:
6^2+8^2=c^2 (c is the hypotenous)
100=c^2
c=10
Find the slope/
please help me
х
y
Rise =
6
-3
Run =
0
1
0 -3
3
3
m =
-6
5
Use this to answer
Using two of the points on the line, you can find the slope of the line by finding the rise and the run. The vertical change between two points is called the rise, and the horizontal change is called the run. The slope equals the rise divided by the run
Identify the missing numbers.
____ -2 -7 -12 -17 ____
Answer:
3,-2,-7,-12,-17,-22
when going up add, when going down subtract.
Example: -2+5=3
-17-5=-22
Find the distance to walk along the following path pls help I’m desperate
9514 1404 393
Answer:
NQ = 3π unitssector area = 9π square units24 +3π unitsStep-by-step explanation:
The formulas tell you for a circle of radius 6, ...
C = 2π(6) = 12π
A = πr² = π(6²) = 36π
__
a)
Arc NQ is 1/4 of the circumference of the circle, so will have length ...
NQ = 1/4C = 1/4(12π)
NQ = 3π . . . . units
__
b) Each sector is 1/4 the area of the circle. The area of one sector is ...
sector area = 1/4A = 1/4(36π)
sector area = 9π . . . . square units
__
c) The total path length is equal to the sum of the lengths of the pieces of the path length. Each radius is 6 units.
PRQNP = PR +RQ +QN +NP
= PR +RQ +QN +NR +RP
= 6 +6 +3π +6 +6
path length = 24 +3π . . . . units
__
Numerical answers (rounded to hundredths):
NQ ≈ 9.42 u
area ≈ 28.27 u²
PRQNP = 33.42 u
The random variable X is normally distributed with a mean of 70 and a standard deviation of 10. What is the probability that X is between 72 and 84? (a) 0.683 (b) 0.954 (c) 0.271 (d) 0.340
The probability that the X is between 72 and 84 is 0.340 , the correct option is (d) .
In the question ,
it is given that ,
The random variable X is said to be normally distributed ,
the mean is given as , μ = 70 , and
standard deviation of normal distribution is (σ) = 10
probability that X is between 72 and 84 is written as P(72 < X < 84)
= P((72 - 70)/10 \(<\) Z \(<\) (84 - 70)/10)
= P(0.2 < Z < 1.4)
= P(0 \(<\) Z \(<\) 1.4) – P(0 \(<\) Z \(<\) 0.2)
From the z table , we get the values as
= 0.4192 – 0.0793
= 0.3399
≈ 0.340
Therefore , The probability that the X is between 72 and 84 is 0.340 , the correct option is (d) .
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which rational number does not have a reciprocal
Answer:
the rational numbers that doesn’t have a reciprocal are [math]0 [/math] (which can also be expressed as [math]\frac {0} {x}, x \neq 0 [/math] ), and any number of the form [math]\frac {x} {0} [/math].
Step-by-step explanation:
as the time___, the water___
Answer:
As time increases water decreases
Please help me with this Geometry problem, I'm stuck on it :(
For a given triangle with sides a, b, c and a corresponding angle, A to side a(opposite side a), we would find the measure of the angle by applying the cosine rule which is expressed as
a^2 = b^2 + c^2 - 2bcCosA
Looking at the given triangle, given that a = 12, b = 7, c = 10 and angle A = x, the formula would be applied as shown below
12^2 = 7^2 + 10^2 - 2 * 7 * 10 * Cosx
144 = 49 + 100 - 140Cosx
144 = 149 - 140Cosx
140Cosx = 149 - 144
140Cosx = 5
Cosx = 5/140
Cosx = 0.0357
x = Cos^(- 1)(0.0357)
x = 87.95 degrees
Find the volume of the composite solid. Round your answer to the nearest hundredth.
The volume of the composite solid is 310.86 cubic centimeter where it has a cylinder and cone.
The composite figure has a cylinder and cone
The volume of cylinder =πr²h
The radius of cylinder is 3 cm and height is 10 cm
Volume of cylinder = 3.14×3²×10
=3.14×9×10
=282.6 cubic centimeter
Now let us find volume of cone
Volume of cone = πr²h/3
Radius of cone is 3 cm and height is 3 cm
Volume of cone = 3.14×9×3/3
=28.26cubic centimeter
Total volume = 282.6 + 28.26
=310.86 cubic centimeter
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 HELP ASAP TEST IS OVER SOON!!! PLEASEEE
A television screen is a rectangle 35 inches wide and 20 inches long. A television size is advertised as the length of its diagonal. What is the size of the television? In other words, what is the length of the diagonal? Around the answer to the nearest hundredth.
Answer:
35 in
Step-by-step explanation:
set up for proportion its not 9 or 6 or 2
By definition of proportion, complete question is,
⇒ 4 / x = x / 13
We have to given that;
A triangle is shown in image.
Since, Any relationship that is always in the same ratio and quantity which vary directly with each other is called the proportional.
Hence, By definition of proportion, we get;
⇒ 4 / x = x /(9 + 4)
⇒ 4 / x = x / 13
⇒ 4 × 13 = x²
⇒ x² = 52
⇒ x = 7.2
Thus, The complete sentence is,
⇒ 4 / x = x / 13
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the tennessean, an online newspaper located in nashville, tennessee, conducts a daily poll to obtain reader opinions on a variety of current issues. in a recent poll, 762 readers responded to the following question:
The Tennesseean, an online newspaper located in Nashville, Tennessee, conducts a daily poll to obtain reader opinions on current issues. In a recent poll, 762 readers responded to a question. To answer this question, we need more information about the question itself. However, I can provide a general format for an answer that includes the terms you mentioned.
The Tennesseean, an online newspaper, uses daily polls to gather opinions from readers. These polls allow the newspaper to gauge public sentiment on a variety of current issues. The recent poll in question received 762 responses, indicating a level of engagement from the readership.
The Tennesseean, an online newspaper located in Nashville, Tennessee, values reader input and conducts daily polls to gather opinions on a wide range of current issues. In a recent poll, a total of 762 readers responded to the question at hand. This high number of responses indicates that the readership is actively participating in the poll and shows a strong interest in expressing their opinions.
The Tennesseean's decision to conduct daily polls is a strategic approach to engage its audience and involve them in the newspaper's content creation process. By seeking reader opinions, the newspaper ensures that its reporting and coverage align with the interests and preferences of its audience. The high response rate of 762 readers suggests that the poll question was relevant and engaging to the readership.
The Tennesseean's use of daily polls to obtain reader opinions is a commendable effort to involve its audience in the news-making process. The substantial number of responses received in a recent poll, with 762 readers participating, demonstrates a strong level of engagement from the newspaper's readership. This feedback helps the newspaper to better understand the interests and perspectives of its audience, allowing it to deliver more relevant and informative content.
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Which expression is equal to???
help pls pretty pls?
Answer:
6(9+7)
Step-by-step explanation:
SEE THE IMAGE FOR SOLUTION
HOPE IT HELPS
HAVE A GREAT DAY
Which of the following expressions will produce an answer with three significant figures?100 - 83.4101 ÷ 3.752.45 + 18.310 * 1.5
We want to know which of the given expressions will produce an answer with three significant figures. That is, it has an answer with three nonzero numbers.
Let us find the values to know
\(\begin{gathered} 100-83.4=16.6 \\ \text{YES, IT PRODUCES AN ANSWER WITH THREE SIGNIFICANT FIGURES} \end{gathered}\)\(\begin{gathered} \frac{101}{3.75}=26.9333\ldots \\ \\ \text{IT PRODUCES AN ANSWER WITH MORE THAN THREE SIGNIFICANT FIGURES} \end{gathered}\)\(\begin{gathered} 2.45+18.3=20.75 \\ \text{YES, IT PRODUCES AN ANSWER WITH THREE SIGNIFICANT FIGURES} \end{gathered}\)\(\begin{gathered} 10\times1.5=15 \\ NO\text{, IT DOES NOT PRODUCES AN ANSWER WITH THREE SIGNIFICANT FIGURES} \end{gathered}\)