Answer:
Below.
Step-by-step-explanation:
This is the number of permutations of 2 from 7.
= 7! / (7-2)!
= 7*6*5*4*3*2*1 / 5*4*3*2*1
= 7 * 6
= 42.
Its a permutation because the order of letters do matter,.
[7(2) - 4] + [9+ 8(4)]
Answer:
51
Step-by-step explanation:
[7(2) - 4] + [ 9 + 8(4)]
open brackets
[14 - 4] + [ 9 + 32]
[10] + [41]
10 + 41
= 51
The alpha level is the set of analysis of the data. Identify the boundaries that separate the extreme samples from the samples that are more obviously consistent with the null hypothesis. Assume the null hypothesis is nondirectional, meaning that the critical region is split across both tails of the distribution.
The z-score boundaries at an alpha level α = .05 are:_________
Answer:
Kindly check explanation
Step-by-step explanation:
Given the question :
The z-score boundaries at an alpha level α = .05 are:
When critical region is split across both tails of the distribution.
Then our alpha level is also divided by two and the Zscore of the probability obtained is looked up on the z table.
α = .05
Since critical region is split into 2, alpha will be divided by two to obtain the probability value ;
α/2 = 0.05 / 2
α/2 = 0.025
Zα/2 = Z.025
From the z table, probability of 0.025 corresponds to a Zscore of - 1.96 ( negative tail)
Also, (1 - 0.025) = 0.975 corresponds to a Zscore of - 1.96 ( positive tail)
Z.025 = ±1.96
Which expression is the simplified form of −10+3x−x−7x+5x+7+2x
Answer:
2x - 3
I hope this helps!
#10.) A forest has a perimeter of 210 miles, but no information is given about the shape of the forest. Justify your answers to the following ( in all parts of this problem, the perimeter is still 210 miles):
a.) is it possible that the area of the force is 3000 mi.²? Explain.
b.) is it possible about the area of the forest is 3600 mi.²? Explain.
c.) if the forest is shaped like a rectangle, then is possible that the area is 3000 mi.²? Explain.
d.) if the forest is shaped like a rectangle, then is it possible that the area of the force is 2500 miles? Explain.
Find the volume of the rectangular prism.
Answer:
Step-by-step explanation:
multiply 9 by 8 by 6
432cm
A driving range charges $4 to rent a golf club plus $2.75 for every bucket of golf balls you hit. Write an equation
that shows the total cost c hitting b buckets of golf balls.
Answer:
4+2.75b=c
Step-by-step explanation:
The price of 4 is already set and so we don't know how many buckets of golf balls are used so we put the variable after it.
An organization has raised $4800 for a remodeling project. This is 60% of their goal.
What is their fundraising goal
Answer:
$8000
Step-by-step explanation:
1. Work out 1% of the overall value:
4800= 60%
4800/60= 1%
80= 1%
2. Use this to work out 100%:
80 x 100= 100%
8000= 100%
3. Put this back into the context of the question:
Fundraising goal= $8000
20*35*x = 7626.9923/2
Answer:
X = ejpp formula
Step-by-step explanation:
Can someone help me please
Answer:5
Step-by-step explanation:
yes
se the drawing tool(s) to form the correct answer on the provided graph.
A barrel in Jim's yard contains 60 gallons of water. Water leaks out of the barrel at a rate of 1 gallon every 10 minutes.
Create and graph the solution set of the equation for the gallons of water, y, remaining in the barrel in terms of the number of minutes elapsed, x
Answer:
it will take 10 hours for the barrel to empty out
Step-by-step explanation:
Given the points (–1,3) and (2,–3), what's the slope of the line?
Answer: -2
Step-by-step explanation:
rise/run= y2-y1/x2-x1
Two Parallel lines are intersected by a transversal /1 and /2 are alternate exterior angles. The measure of /1 is (5x - 16) the measure of /2 is (4x-2) what is the measure of each angle?
A.m/1=m/2=46
B.m/1=94 and m/2=86
C.m/1=m/2=54
D.m/1=m/2=70
Answer:
C. m/1=m/2=54
Step-by-step explanation:
these two angles are equal hence:
5x-16=4x-2=-16+2 =-14
4x-5x=-x
-x=-14=x=14
then you substitute the value of 'x' with 14
therefore:(5×14-16)=54
(4×14-2)=54
m/1=m/2=54
solve
0=40+3x
show work please
Ellie must mix 6 tablespoons of plant food for every 2 gallons of water. If she has 6 gallons of water,how much plant food should she use?
What’s the y intercept ?
Answer:
(0,3)
Step-by-step explanation:
Simplify: −2s − 9 + 7 − 5r use s = 3 and r =
Answer:
-2s - 9 + 7 - 5r
Step-by-step explanation:
Add -9 and -7.
-2s - 2 - 5r
Move -2.
-2s - 5r - 2
Reorder -2s and -5r.
-5r - 2s - 2
I hope this helps.
if you could, feel free to mark me Brainliest it would be much appreciated :D
Read the following scenarios. For each scenario you need to decide which of the following four methods is appropriate.
A. One sample t test
B. Paired samples t test
C. Independent samples t test
D. One-way analysis of variance (ANOVA)
1. A shareholders' group suspects that the mean tenure of corporate chief executive officers (CEO) is significantly greater than the 5 years that CEO supporters claim. The group has hired a statistician who is using information on tenure of the last retired CEO in a sample of 30 corporations to test this claim.
2. All employees in a firm have recently received professional development training that is designed to improve their productivity. A manager wants to know whether or not the post-training productivity differs significantly across low-, medium-, and high-education employees.
3. A computer manufacturer has designed twenty-three prototype microcomputer central processing unit chips, and is using a sample of 506 computers (22 computers carrying each prototype) to evaluate whether the mean processing time differs significantly across the twenty-three prototypes.
4. In a blind taste experiment a group of potential customers were asked to rate the taste of two different coffee brands on a scale of 0 to 10. The experimenter wants to know whether or not on average the ratings differ for the brands.
5. A bank manager wants to know whether or not the average waiting time for bank customers is significantly different between two local branches of that bank.
6. A national auto dealers association claims that the mean price of a used car is $9,987. A used car dealership manager located in the City of Baltimore wants to test this claim using a sample of 45 cars currently parked at the dealership.
7. A computer manufacturer has discovered a method to improve performance of existing CPU chips by coating those chips with a fine layer of a special patented chemical. The manufacturer wants to test the effectiveness of this method in two groups of similar computers. The CPU chips in only one group have received a coating of the special chemical.
8. A computer manufacturer has discovered a method to improve performance of existing CPU chips by coating those chips with a fine layer of a special patented chemical. The manufacturer wants to test the effectiveness of this method in a sample of 54 computers by observing CPU performance before and after applying the coating.
9. A local landscaping business owner wants to test the hypothesis that the mean tree planting time differs significantly from 2 hours for her employees.
10. An educator wants to test the hypothesis that average SAT score in the population is the same in Belgium, Denmark, and Netherlands.
11. Using random state-level household samples, a social scientist wants to know whether or not the mean household size is the same across 50 states in the U.S.
12. It has been claimed that average nursing salaries in Milwaukee, Wisconsin are lower than those in Pittsburgh, Pennsylvania. A medical professional wants to test this claim using a sample of salaries from the two cities.
13. A student government representative at a mid-sized East Coast university wants to test the mean difference in GPA at the beginning and end of the freshman year using a sample of 89 undergraduate students.
14. All employees in a firm have recently received professional development training that is designed to improve their productivity. The training provider claims that such training increases employee productivity by 10%. A firm manager has obtained estimates of change in productivity for 32 employees who received the training, and wants to test the training provider's claim.
ax+by=c solve for y plz help hurryyyyy
Which is the value of this expression when x = negative 2 and y = negative 3?
10 x cubed y squared
Answer:
-720
Step-by-step explanation:
Took the quiz and got it right, the dude above me is wrong
Please make me the Brainliest!!!
Solve equation 5 = 4(b-3)
Answer:
[tex] b = \dfrac{17}{4} [/tex]
Step-by-step explanation:
5 = 4(b-3)
Distribute the 4 on the right side.
5 = 4b - 12
Add 12 to both sides.
17 = 4b
Divide both sides by 4.
[tex] \dfrac{17}{4} = b [/tex]
Answer: [tex] b = \dfrac{17}{4} [/tex]
-5/12 • 8/13= What is the sum?
Answer:
-10/39
Step-by-step explanation:
Round 65.177 to the nearest tenth
Graphs of the following equations are straight lines except :
A. 3x+2y=8
B. y=x/2-5
C. x=4y
D. y=x^2+3
Answer:
D
Step-by-step explanation:
The graph of the equations are straight lines except : [tex]y=x^2+3[/tex]
What is graph of quadratic equation?The graph of a quadratic function is called a parabola and has a curved shape. One of the main points of a parabola is its vertex. It is the highest or the lowest point on its graph.
According to the question
Graphs of the following equations :
A. 3x+2y=8
This is a straight line graph as it variables are linear and after plotting graph this can be seen .
Points
(0,4) (2,1) ....
B. y=[tex]\frac{x}{2}-5[/tex]
This is a straight line graph as it variables are linear and after plotting graph this can be seen .
Points
(0,-5) (2,-4) ....
C. x=4y
This is a straight line graph as it variables are linear and after plotting graph this can be seen .
Points
(0,0) (1,4) ....
D. [tex]y=x^2+3[/tex]
This is a quadratic equation , therefore its graph will be a parabola .By plotting graph can be observed.
Points
(-1,4)(0,3) (1,4)......
Hence, the graph of the equations are straight lines except : [tex]y=x^2+3[/tex]
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100+100 baby sharks give me the right answer to.
Answer:
if u mean 100 + 100 it is 200
Step-by-step explanation:
Answer:
100 + 100 =200 but your question confuses me
Step-by-step explanation:
What do you know about parallel slopes; perpendicular slopes?
Answer:
Parallel slopes: two lines that has the same slopes but have different y-intercept
Perpendicular slope: two lines that are negative reciprocals(common) of each other
Classify the following triangle. Check all that apply.
98
41
41
9514 1404 393
Answer:
obtuse isosceles triangle
Step-by-step explanation:
These cannot be side length measures. Their total is 180, so the could be angle measures. The largest is more than 90°, so is an obtuse angle. Two of the measures are the same, so the triangle is isosceles.
The triangle is ...
obtuseisoscelesHow are proportional quantities described by equivalent ratios?
Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin. ... Describe situations in which opposite quantities combine to make 0.
Proportional quantities are described by equivalent ratios as shown below
[tex]\frac{p_1}{q_1} = \frac{p_2}{q_2}[/tex]
Let the two proportional quantities be p and q
If p and q are proportional, then [tex]p \alpha q[/tex]
Introducing a proportionality constant (k)
[tex]p = kq\\\\k = \frac{p}{q}[/tex]
Since the two quantities are proportional, the ratio of initial values will be equal to the ratio of their final values.
That is [tex]\frac{p_1}{q_1} = \frac{p_2}{q_2}[/tex]
Therefore, proportional quantities are described by equivalent ratios as shown below
[tex]\frac{p_1}{q_1} = \frac{p_2}{q_2}[/tex]
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The table shows the monthly cost of an online music subscription based on the number of songs downloaded. How can you find the cost, C , of downloading n songs, for n> 1?
Chart: Number of songs
1 song = $5.00
2 songs= $5.35
3 songs= $5.70
4 songs= $6.05
Answer options:
1. Multiply n by $0.35 and add $5
2. Add $0.35 to the cost of downloading n - 1 songs.
3. Add $5 to the cost of downloading n- 1 songs.
4. Multiply n by 0.35
PLEASE ANSWER ILL GIVE U 100 points
Answer:
A is correct
Step-by-step explanation:
The correct equation to find the cost, C , of downloading n songs,
for n> 1 is,
⇒ Multiply n by $0.35 and add $5
Option 1 is true.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The table shows the monthly cost of an online music subscription based on the number of songs downloaded.
Here, The table is,
Chart : Number of songs
1 song = $5.00
2 songs = $5.35
3 songs = $5.70
4 songs = $6.05
Hence, The cost of n songs is,
⇒ $5 + $0.35 × n
⇒ $5 + $0.35n
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the average person takes about 30,000 breaths per day. express this number as a single digit integer times a power of 10
Answer:
3 * 10^4
Step-by-step explanation:
Answer:
3*10^4Step-by-step explanation:
Given
Number 30000Express in scientific notation
30000 =3*10000= 3*10^4To solve 38 = 6x - 16, you would subtract 16 and then divide by 6.
true
or
false
Answer:
true to some extent
Step-by-step explanation:
you would subtract 16 from both sides of the = sign. 38-16 is 22 and you divide that by 6 and you get x