Answer:
The correct option is;
0.28
Step-by-step explanation:
The given parameters are;
The mean score for Michael, [tex]\bar x _1[/tex] = 150
The standard deviation, σ₁ = 30
The mean score for Alan, [tex]\bar x _2[/tex] = 165
The standard deviation, σ₂ = 15
Taking n₁ = n₂ = 1
[tex]z=\dfrac{(\bar{x}_{1}-\bar{x}_{2})-(\mu_{1}-\mu _{2} )}{\sqrt{\dfrac{\sigma_{1}^{2} }{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}}[/tex]
Taking μ₁ - μ₂ = 0
[tex]z=\dfrac{(150-165)}{\sqrt{\dfrac{30^{2} }{1}-\dfrac{15^{2}}{1}}} \approx -0.577[/tex]
The p-value for a z-score of -0.577 from the z-table is 0.28434
Therefore, the probability that Michael, with mean score, [tex]\bar x _1[/tex] = 150 will have a greater score than Alan, with a mean score of [tex]\bar x _2[/tex] = 165 is 0.28434 ≈ 0.28
Therefore, the correct option is 0.28
23+11x-5=39
What’s the answer
18:3:9 in it's simplest form
Two boats are traveling in a canal in opposite directions, where x represents the distance, in feet, between the boats. the equation 4(x 1) = 4x 4 models the paths of the boats. solve for x. no solution 0 all real numbers 1
Answer: the answer would be all real numbers
Step-by-step explanation:
I got it right on the test
At the beginning of the fall, the water level of a lake is 11 1/3
feet below normal level. After a drought, the lake's water
level dropped 7 2/3 feet. Where is the lake's current water
level in relation to its normal water level?
The lake's current water is dropped ( 55 / 3 ) feet below the normal water level.
A collection of ordered pairs having one item from each set makes up a relation between two sets. If the ordered pair (x,y) is present in the relation and the objects x and y come from different sets, then the objects are said to be connected. One kind of relation is a function.
Let x be the normal water level of the lake.
At the beginning of the fall, the level of water of the lake is [tex]11\frac{1}{3}[/tex] feet below the water level.
So, the change in water level [tex]-11\frac{1}{3}[/tex].
Then, the water level of the lake dropped [tex]7\frac{2}{3}[/tex] feet after the drought.
Again, the change in water level will be [tex]-7\frac{2}{3}[/tex].
Hence, the total change in water level will be:
[tex]=-11\frac{1}{3}-7\frac{2}{3}[/tex]
= ( - 33 + 1 ) / 3 - ( 21 + 2 ) / 3
= ( - 32 / 3 ) - ( 23 / 3 )
= ( - 55 / 3 )
Therefore, the lake's water level dropped ( 55 / 3 ) feet below the normal water level.
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-10
-8
-6
-4 -2
10
00
8
9
4
54
2
-2
-4
-6
op
-10
2
4
9
8
00
10
10/586=582824448
55359=5244+88556-89595
=8388256
Question 4 of 10
Which choice is equivalent to the product below for acceptable values of x?
√7x √x+2
The equivalent choice of √7x √x+2 is x√7 + 2√7x
How to determine the equivalent choice?The product expression is given as:
√7x √x+2
Rewrite as:
√7x * (√x + 2)
Expand the bracket
√7x^2 + 2√7x
Take the square root of x^2
So, we have
x√7 + 2√7x
Hence, the equivalent choice of √7x √x+2 is x√7 + 2√7x
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which of the following steps were applied to ABCD to obtain A'B'C'D'?
There is a translation of 3 units to the right and 4 units upwards to translate ABCD into A'B'C'D', then the correct option is C.
"Shifted 3 units right and 4 units up"
which of the following steps were applied to ABCD to obtain A'B'C'D'?
Let's just compare one of the vertices to identify the translation applied.
We can see that the coordinates of vertice A are (2, 3).
While the coordinates of the vertice A' are (5, 7)
If we take the difference between these two coordinate pairs, we will et
A' - A = (5, 7) - (2, 3)
Remember that this difference is computed component to component, so we have:
(5, 7) - (2, 3) = (5 - 2, 7 - 3) = (3, 4)
From this we can conclude that we hade a translation of 3 units to the right and 4 units upwards to translate ABCD into A'B'C'D', then the correct option is C.
"Shifted 3 units right and 4 units up"
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What is the value of x 2,8,9,7.6,x the mean is 6
The value of X is 3.4
Disclaimer:
We will consider arithmetic mean in this case as which mean is not mentioned.
The total number of terms are 5
thus, arithmetic mean= 6
6= (2+8+9+7.6+x)/5
30 = 26.6+x
x=30-26.6=3.4
Thus the value of X is 3.4
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Main Answer:x= 3.4
Concept and definitions should be there
The Arithmetic Mean is the average of the numbers: a calculated "central" value of a set of numbers.
To calculate it:
• add up all the numbers,
• then divide by how many numbers there are.
Given data
the value of x 2,8,9,7.6,x the mean is 6
Solving part
As we know that
mean =(sum of the terms)/(Number of terms)
By substituting the values, we get
6=(2+8+9+7.6+x)/5
30= x+26.6
x= 30-26.6
x= 3.4
Final Answer: Thusx= 3.4 is the correct answer.
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A cyclist rides at a constant speed of 15 miles per hour. At this speed about how long would it take the cyclist to ride from garden city to dodge city, Kansas
The time taken by the cyclist to ride from the garden city to dodge city, Kansas is 3.5 miles/hour.
Given that, a cyclist rides at a constant speed of 15 miles per hour.
We need to find at this speed how long would it take the cyclist to ride from the garden city to dodge city, Kansas.
What is the formula to find time with distance and speed?Calculate speed, distance or time using the formula d = st, distance equals speed times time.
Now, the distance between garden city to dodge city, Kansas 52.3 miles via US-50 E.
So, time taken=52.3/15
=3.48≈3.5 miles/hour
Therefore, the time taken by the cyclist to ride from garden city to dodge city, Kansas is 3.5 miles/hour.
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using a systematic sample guarantees that members of each group within a population will be sampled.
False
• Systematic Sampling is a probability sampling method where people or researchers select members of the population in a regular interval.
• For example, by selecting every 17th person on the list of the population. If the population is in the random order, this can imitate the benefits of random sampling.
• Systematic sampling can help in minimizing biased samples and poor survey results. If there is a low risk for manipulation of data .
• Systematic sampling introduces certain arbitrary parameters in the data. This can cause overrepresentation or underrepresentation of patterns
In systematic sampling, members from a large population are selected according to a random starting and a fixed periodic interval.
Only stratified sampling, where the population is divided into several data, guarantees the member of each group within a population will be sampled.
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Find the value of g(−6) if g(x)=−2x+3
Answer: g(-6)=15
Step-by-step explanation:
(x)= -6G(-6)=-2(-6)+3G(-6)=12+3G(-6)=15For each of the graphs below choose inequality that best represent the graph. explain your reasoning.
a. This graph represents an inequality that has:
A. No solution.
B. All real numbers as the solution.
One such inequality is:
A. x > x + 1.
B. x + 2 < 1.
C. x + 2 > 1.
D. x < x + 1.
Because solving it yields ___, an inequality which is:
A.True.
B.False.
for all real numbers x.
(Type an inequality. Simplify your answer).
The desired inequalities are given as follows:
A. A. x > x + 1. because solving it yields an inequality that is False for all real numbers x.
B. D. x < x + 1, because solving it yields an inequality that is True for all real numbers x.
Which inequality represents graph A?For graph A, as nothing is plotted on the line, we have a inequality with no solution.
The successor of a number(number plus 1), will always be greater than the number, hence the inequality that has no solution is:
A. x > x + 1. because solving it yields an inequality that is False for all real numbers x.
Which inequality represents graph B?For graph B, as the entire line is plotted, we have a inequality with all real values as solution.
From the same logic above, of the successor, the correct option is:
D. x < x + 1, because solving it yields an inequality that is True for all real numbers x.
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luther drew a scale drawing of an italian restaurant. he used the scale 1 millimeter : 6 meters. in the drawing, the restaurant's kitchen is 3 millimeters wide. what is the width of the actual kitchen?
The actual kitchen measures 18m in width.
• In mathematics, the unitary method is used to find the necessary value by first determining the value of a single unit and then multiplying the number by the single unit value.
• For example, if a car travels 60 kilometers on three litres of gasoline, we can calculate the number of kilometers traveled on one litre of gasoline using the unitary method.
We are given that Luther drew a scale drawing of an Italian restaurant. He used a scale on which 1 millimetre equals 6 meters. We need to find the width of the kitchen if in the drawing it is 3 mm wide.
So,
1mm = 6m
3 mm =?
3 mm = 6*3
3 mm = 18 m
The actual width of the kitchen is 18 m.
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| 7 + m | - 4 > 8
A m > 9 or m < -15
B m > -2 or m < -20
C m > 5 or m < -19
D m > 7 or m < 0
Answer:
C m > 5 or m < -19
Step-by-step explanation:
i took the test
Which of these choices are square roots of 100? Check all that apply.
A -100^1/2
B -50
C 10
D -10
E 50
F 100^1/2
Answer:
C. 10
Step-by-step explanation:
It is very easy to find the square root of a number that is a perfect square. For example, 100 is a perfect square, 100 = 10 × 10. So, 10 is the square root of 100 and this can be expressed as √100 = 10. The square root of any number, in general, can be found by using any of the four methods given below:
Repeated Subtraction MethodPrime Factorization MethodEstimation and Approximation MethodLong Division Methodfind the area of the triangle.
Answer:
2x^2 + 8x
Step-by-step explanation:
Area of triangle: base x height / 2
So: 2x(2x+8)/2
We cancel 2 so:
x(2x+8)
then = 2x^2 + 8x
Please help
------------------------------------------
Answer:
(-5,5) and (0,-0.1) , solutions to the equation
(5,5) and (10,5) ...not solution to the inequality
Step-by-step explanation:
5,5) and (0,-0.1) ,,,they are solutions to the inequality since they lie in the required region (unshaded region)
(5,5) and (10,5) ,,,they lie in the shaded region which is the required region hence not among the required points.
The measure of an angle is 81.1°. What is the measure of its supplementary angle?
Answer: 98.9°
Step-by-step explanation:
Supplementary angles are two angles whose measures add up to 180 degrees.
=180-81.1
=98.9°
A waitress is filling coffee mugs at a diner. She pours 350 milliliters into each of the 5 mugs from a full pot of coffee. If her coffee pot holds 2.5 liters, how many milliliters does she have left in her pot?
Answer:750 milliliters
Step-by-step explanation:
2.5 liters=2500 milli
5*350=1750 milli
2000-1750=750 milli
i neeed help 5(9/12−14)+0.5
can u solve
Answer:
[tex] \sf \large \: \frac{ - 263}{4} [/tex]
Step-by-step explanation:
5(9/12−14)+0.5
=5(3/4−14)+0.5
=5(−53/4)+0.5
=−265/4+0.5
=−263/4
a cell phone company charges an initial price of $400 for a new phone and then $50 each month after the purchase. if c (t) is a rational function that represents the average monthly cost of owning the cell phone, what is the range of the function? r: ℝ r: (–[infinity], [infinity]) r: (0, 400) r: (50, 450)
The range of the average cost function of a cell phone that has an initial and monthly costs $400 and $50 is r:(50, 400)
Which method can be used to find the range of the average cost function?Initial price for the cell phone = $400
Charges per month after purchase = $50
The rational function representing the average monthly cost = c(t)
Required; The range of the average monthly cost function, c(t)
Solution:
The total cost of owning the cell phone, C, is therefore;
C = 400 + 50•∆tWhere;
∆t = The number of months after purchase
The average monthly cost is therefore;
[tex]c(t) = \frac{C}{ \Delta t} [/tex]
At ∆t ≈ 0, we have;
C ≈ 400
The cost for the month at ∆t ≈ 0, is therefore, c(t) = $400
At ∆t ≈ ∞, we have;
[tex] \lim\limits_{∆t→∞} \frac{400}{ ∆t} = 0[/tex]Therefore;
[tex] \lim\limits_{∆t→∞} c(t) = \frac{400+ 50× ∆t}{ ∆t} ≈ 50[/tex]
Which gives;
The range of c(t) is (50, 400)
The correct option is therefore;
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1. What is the conclusion of the following conditional?
A number is divisible by 3 if the sum of the digits of the number is divisible by 3.
The number is odd.
The sum of the digits of the number is divisible by 3.
If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.
The number is divisible by 3.
Answer:
The number is divisible by 3.
Step-by-step explanation:
The conclusion is what a conditional statement ends with.
solve: 5/3x+1/3x=21 2/3+7/3
Answer: x = 12
Step-by-step explanation:
1) Convert mixed numbers into improper fractions: [tex]21\frac{2}{3} =\frac{21*3+2}{3} =\frac{65}{3}[/tex]
New equation written as: [tex]\frac{5}{3}x+\frac{1}{3}x=\frac{65}{3}+\frac{7}{3}[/tex]
2) [tex]\frac{5}{3}x+\frac{1}{3}x=\frac{65+7}{3}[/tex]
3) Add the numbers 65 + 7 = 72: [tex]\frac{5}{3}x+\frac{1}{3}x=\frac{72}{3}[/tex]
4) Divide 72/3 = 24: [tex]\frac{5}{3}x+\frac{1}{3}x=24[/tex]
5) Multiply both sides by 3. Note: * = multiply: [tex]\frac{5}{3}x*3+\frac{1}{3}x*3=24*3[/tex]
6) Simplify: 6x = 72
7) Divide both sides by 6: [tex]\frac{6x}{6}=\frac{72}{6}[/tex]
x = 12
Q2) 1,-3, 9, -27, 81, -243, ...
Bobby was absent from school and called you to find out what he missed. You say to find the next
numbers in pattern 2 you would
Solving the Question
We're given:
1,-3, 9, -27, 81, -243, ...The first term is 1. It appears that, to get each consecutive term, we have to multiply the previous term by -3.
i.e. 1 x -3 = -3-3 x -3 = 99 x -3 = -27Therefore, to get each the next two terms, we have to multiply the previous term by -3.
AnswerTherefore, to get each the next two terms, we have to multiply the previous term by -3.
PLEASE I NEED HELP TO PASS
Answer:
x = 17
Step-by-step explanation
the two interior angles add up to the exterior.
San Diego's family took a road trip to Mount Rushmore San Diego fell asleep 44% of the way through the trip if the total length of the trip was 400 miles how many miles have they traveled when he fell asleep
The number of miles that they traveled when San Diego fell asleep will be 176 miles.
How to illustrate the information?It should be noted that from the information, San Diego's family took a road trip to Mount Rushmore and San Diego fell asleep 44% of the way through the trip.
In this case, the total length of the trip was 400 miles.
Therefore, the number of miles that they traveled when he fell asleep will be:
= Percentage × Total miles
= 44% × 400
= 0.44 × 400
= 176 mile
Therefore, the number of miles that they traveled when San Diego fell asleep will be 176 miles.
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3. Jason and Eric discovered that the
means of their grades for the first
marking period in their math class
were identical. They also noticed that
the standard deviation of Jason's
grades is 20.7, while the standard
deviation of Eric's grades is 2.7. Which
statement must be true?
(1) In general, Eric's grades were lower
than Jason's grades.
(2) Eric's grades are more consistent than
Jason's grades
(3) Eric had more failing grades during the
marking period than Jason had.
(4) The median for Eric's grades is lower
than the median for Jason's grades.
Answer:
2
Step-by-step explanation:
MAD stands for mean absolute deviation.
The larger the MAD, the more spread out the data set is.
This means that Jason’s grades must vary more.
Can someone please help mee (20 points
brainliest!!!)
Answer:
I may have mixed up the meaning of the variables...
Step-by-step explanation:
Every additional 1 card sold, price decrease $0.05 Known point, (6, 280). x is price, p is ... number of cards sold.
Find the dimensions and maximum area of a rectangle if its perimeter is 12
Is the answer 48?
Please help!
An expression is shown.
4 · (−12)
Select all equivalent expressions.
• -7-6
• -12.4
• -12-(-4)
• 8-(-6)
• −3 - 16
Expression: 4*(-12)= -48
-7-6= -13
Equivalent: -12*4= -48
8-(-6)= 14
-3-16= -19