Considering the situation described, the scientist's null and alternative hypothesis are described by:
Null hypothesis [tex]H_0: \mu = 0[/tex]; Alternative hypothesis [tex]H_1: \mu \neq 0[/tex].
What are the hypothesis tested?At the null hypothesis, it is tested if there is no difference, that is, the difference of the means represented by [tex]\mu[/tex] is of 0, hence:
[tex]H_0: \mu = 0[/tex]
At the alternative hypothesis, it is tested if there is a difference, hence:
[tex]H_1: \mu \neq 0[/tex]
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In the trapezoid below, DE is parallel to AB. If CE = 6, AC = 6.4, and
DC = 4, find the length of CB. Figures are not necessarily drawn to scale.
E
D
-
А
B
Answer:
Hi po the answer is ab
Step-by-step explanation:
hope it help
Answer:
hope its help
Step-by-step explanation:
godblesscarry on learning48% of what number is 84?
Answer:
100 i think
Step-by-step explanation:
let the number be x
48% = 0.48
0.48x = 48
48 / 0.48 = x
x = 100
Haley’s work evaluating (Negative 2) Superscript 8 is shown below.
(Negative 2) Superscript 8 = (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) = negative 256
Which statement best describe Haley’s first error?
Haley’s work evaluating (Negative 2) Superscript 8 is shown below.
(Negative 2) Superscript 8 = (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) (negative 2) = negative 256
Which statement best describe Haley’s first error?
Answer:
256
Step-by-step explanation:
You multiply -2 an even amount of time which gives you a positive answer, if you were to multiply them an odd amount of times then it would be a negative number.
Answer:
The other guy is correct it is d Haley misinterpreted and got the wrong sign
Step-by-step explanation:
We want to cut an apple pie of 9-inch diameter into equal slices, so that the area of each slice is at
least 10 square inches. What’s the maximum number of slices we can cut? please help
Answer:
Step-by-step explanation:
A'=25.4469 square inches Explanation:diameter is 18shape is circularArea of full pizza is A= ×1824Number of slices is 10 equalArea of each slice is A'=110AA'=110×π×1824A'=25.4469 square inches
Need help with this math problem please
pls help i don’t know how to do this
Step-by-step explanation:
to do what ?
the calculation of the 2 solutions for the quadratic equation is already done here.
so, what else do you need ? an explanation ?
in general, a quadratic equation looks like
ax² + bx + c = 0
and the formula for the solutions is
x = (-b ± sqrt(b² - 4ac))/(2a)
remember, a linear equation (x¹) has one zero solution.
a quadratic equation (x²) has 2 zero solutions.
a cubic equation (x³) has 3 zero solutions.
and so forth.
the 2 solutions here are created by the "±" operation. one solution is using the "+". and the other the "-". that is all.
so, what happened here was simply putting the values of the given equation into the solution formula and doing the calculations.
and the final line is saying that the solutions are the set of the 2 numbers represented by the "±" expression.
to finish this up for better clarity :
the first solution is
x = (-17 + sqrt(217))/4 = -0.567270034...
the second solution is
x = (-17 - sqrt(217))/4 = -7.932729966...
is there anything still unclear ? please let me know.
Byron’s income last year was $61,700. He made $48,000 at his plumbing job and had income from an apartment that he rented out. If Byron earned the same amount of rent each month for the entire year, approximately how much per month did he collect? a. $940 b. $1,140 c. $4,000 d. $5,140 Please select the best answer from the choices provided A B C D.
Answer:
c
Step-by-step explanation:
i got i wrong with b and d and it showed me the right aswer
14. If f(x) = 3x - 4 and g(x) = x2 - 4x + 6, then f(x) - g(x) for what values of x?
Answer:
X = 2
Step-by-step explanation:
Help!! Thank you so much beforehand
Answer: x=8
Step-by-step explanation: these two polygons are similar. 96 divided by 8 equals 12. So 64 divided by 8 equals 8, which is the answer. I really hope this helps and I hope you have a great day!
1. The price of an article with 15% VAT is Rs. 920. What will be the
price excluding VAT?
Answer:
Rs 800
Step-by-step explanation:
VAT%=15%
Total price =Rs920
Consider price without VAT as Rs x.
Then,
Total price =x+15%of x
or,920=23x/20
or, 23x=920*20
or, x=18400/23
Therefore, x=Rs 800
A robot can complete 8 tasks in ⅚ hour. Each task takes the same amount of time. How long does it take the robot to complete one task? It takes the robot ___1___ hour(s) to complete one task. How many tasks can the robot complete in one hour? The robot can complete ______ task(s) in one hour.
Answer:
1 task = 6.25 minutes
The robot can complete 9.6 task in 1 hour
Step-by-step explanation:
Number of task = 8
Time taken = 5/6 of 1 hour
5/8 of 1 hour = 5/6 × 60 minutes
= 300/6
= 50 minutes
8 task takes 50 minutes
1 task = 50 minutes / 8 task
= 6.25 minutes
1 task = 6.25 minutes
x task = 60 minutes
1 : 6.25 = x : 60
1/6.25 = x / 60
1*60 = 6.25*x
60 = 6.25x
x = 60/6.25
= 9.6
x= 9.6
The robot can complete 9.6 task in 1 hour
14 out of 50 equals what percent
Answer:
28%
Step-by-step explanation:
50 x 0.28 is 14
The opposite angles of cyclic quadrilateral are(3X+10) and (2X+20). Find the angles.
Answer:
40°
Step-by-step explanation:
Opposite angles in a cyclic quadrilateral are equal
3x + 10 = 2x + 20
Take away 2x from both sides
x + 10 = 20
Take away 10 from both sides
x = 10
Now that we know the value of x, substitute it back into the equations
3x + 10 = 3 x 10 + 10 = 30 + 10 = 40
2x + 20 = 2 x 10 + 20 = 20 + 20 = 40
Both angles are equal to 40°
Step-by-step explanation:
Need to FinD :We have to find the angles.[tex] \red{\frak{Given}} \begin{cases} & \sf {We\ are\ given\ a\ cyclic\ quadrilateral.} \\ & \sf {The\ measures\ of\ the\ opposite\ angles\ of\ the\ quadrilateral\ are\ {\pmb{\sf{(3x\ +\ 10)^{\circ}}}}\ and\ {\pmb{\sf{(2x\ +\ 20)^{\circ}}}}.} \end{cases}[/tex]
We know that,
The opposite angles of the cyclic quadrilateral are (3x + 10)° and (2x + 20)°. And we have to find the angles.In a cyclic quadrilateral, all the four vertices of the quadrilateral lie on the circumference of the circle. The opposite angles in a cyclic quadrilateral add up to 180°. So simply, we just simplify the measures and find the value of x. And at last, we'll find the angles of the quadrilateral.
[tex]\rule{200}{3}[/tex]
[tex] \sf \dashrightarrow {(3x\ +\ 10)\ +\ (2x\ +\ 20)\ =\ 180} \\ \\ \\ \sf \dashrightarrow {3x\ +\ 10\ +\ 2x\ +\ 20\ =\ 180} \\ \\ \\ \sf \dashrightarrow {5x\ +\ 30\ =\ 180} \\ \\ \\ \sf \dashrightarrow {5x\ =\ 180\ -\ 30} \\ \\ \\ \sf \dashrightarrow {5x\ =\ 150} \\ \\ \\ \sf \dashrightarrow {x\ =\ \dfrac{\cancel{150}}{\cancel{5}}} \\ \\ \\ \dashrightarrow {\underbrace{\boxed{\pink{\frak{x\ =\ 30.}}}}_{\sf \blue{\tiny{Value\ of\ x}}}} [/tex]
∴ Hence, the required value of x is 30. Now, let us find out the angles.
[tex]\rule{200}{3}[/tex]
First AnglE :
3x + 103(30) + 1090 + 10100∴ Hence, the measure of the first angle of the quadrilateral is 100°.
[tex]\rule{200}{3}[/tex]
Second AnglE :
2x + 202(30) + 2060 + 2080∴ Hence, the measure of the second angle of the quadrilateral is 80°.
The equation of a line is y = -3x – 2. What are the slope and the y-intercept of the line? * -3. y-intercept = 2 slope
3. y-intercept = -2 slope
3. y-intercept = 2 slope
-3. y-intercept = -2 slope
Answers:
Slope = -3
y intercept = -2
Explanation:
Compare the given equation with y = mx+b
We see that m = -3 is the slope and b = -2 is the y intercept.
[tex]===========================================[/tex]
we're given the line's equation; it's written in slope-intercept form, which looks like so:
[tex]\pmb{y=mx+b}[/tex]
where
[tex]\pmb{m}[/tex] is the line's slope
[tex]\pmb{b}[/tex] is the y-intercept of the line
in this case,
slope: [tex]\pmb{-3}[/tex]
y-intercept: [tex]\pmb{-2}[/tex]
[tex]=====================================[/tex]
note:-Hope everything is clear; if you need any more explanation, kindly let me know.
Click and drag like terms onto each other to simplify fully.
2-5+7y-5x+7x-2y
Answer: 5y + 2x - 3
(In simplest form)
I would like the right and serious answer pls thx :D
In a survey of 930 students in a school, 92% reported having pets at home. What is the margin of error?
Answer:
8% or 74
Step-by-step explanation:
930 x 0.92 = 856
930 - 856 = 74
Have a great day!!
Please rate and mark brainliest!!
In a survey of 930 students in a school, 92% reported having pets at home then margin of error is 3.3%.
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
In a survey of 930 students in a school.
92% reported having pets at home.
We need to find the margin of error.
The formula for margin of error=±1/√n
Where n is number of students
margin of error=±1/√930
=±1/√930
=±1/30.45
=±0.033
Now let us multiply with hundred.
=3.3%
Hence, In a survey of 930 students in a school, 92% reported having pets at home then margin of error is 3.3%.
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3(2x + y) + 4(x – 4y) + x2
Answer:
12x-13y
Step-by-step explanation:
6x+3y+4x-16y+2x
combine like terms
12x-13y
help ts all in the screenshot
I think it's decreasing
Find the equation of the hyperbola if y=2x−5 and y=−2x+3 are the asymptotes, and it is known that one of the vertices is on the y-axis.
Answer:
(x-2)^2/4 - (y+1)^2/16 = 1
Step-by-step explanation:
The first thing you want to do is find the center of the hyperbola. Since you have the two equations of the asymptotes, their intersection must be what you want. setting 2x - 5 equal to -2x + 3, you get that x = 2, meaning that 2 is the x-coord of your center. Plugging this value of x into the equations, you get that y = -1. Now that you have your center, you have the information that one of the vertices is on the y-axis. Since the distance from the center to the vertice must be a straight line, you know for sure that this hyperbola is a horizontal one (a vertical one would not have a vertice on the y-axis given this center). Knowing this, you have the equation form (x-2)^2/a^2 - (y+1)^2/b^2 = 1. I got a little confused here, but remember that you now know the center and the equations of the asymptotes. y = 2x - 5 is equal to 2(x - 2) - 1. The form of the asymptotes of a horizontal hyperbola is b/a(x-h) + k, which means that b/a must be equal to 2. This also means that 2a = b, and 4a^2 = b^2. Now you can substitute b^2 for 4a^2, leaving you with the equation (x-2)^2/a^2 - (y+1)^2/ 4a^2 = 1. Remember that vertice on the y-axis? Since it must be at the same y-coordinate (since you know that it must be a horizontal line from the center to the vertice), you know the vertice has to be (0, -1). You can plug these values into the previous equation, which gives you (0 - 2)^2 / a^2 - 0 = 1. This leaves you with 4/a^2 = 1, which means that a must be 2. Since you already know that b is 2a, b must be equal to 4. Plugging those values into the equation, you get your final answer, (x-2)^2/4 - (y+1)^2/16 = 1.
A jeweler made a new crown for the queen. It was made with an 8.74-carat diamond, a 7.086-carat ruby, and a 4.932-carat sapphire.
What is the approximate total weight of the gems?
Answer:
20.758
Step-by-step explanation:
8.74 + 7.086 + 4.932
on a number line where do 0.85 and 0.50 go
Answer:
0.50 goes right in the middle between 0 and 1 and 0.85 goes 1/5 away from 1
Step-by-step explanation:
Can anybody help me with this?
You can multiply -2.2 by 6.2 to find the total variation in water level. What decimal represents the total variation in water level that Ericka observed?
Answer:-13.64
Step-by-step explanation:
Diego estimates that there will need to be 3 pizzas for every 7 kids at his party. Select all the statements that express this ratio.
Select all that apply:
a.The ratio of pizzas to kids is 3 to 7.
b.For every 7 kids there need to be 3 pizzas.
c.The ratio of kids to pizzas is 7:3.
d.The ratio of kids to pizzas is 3:7.
e.The ratio of pizzas to kids is 7 to 3.
The correct statements that express ratio are;
b. For every 7 kids there need to be 3 pizzas.
c. The ratio of kids to pizzas is 7:3.
Here,
Diego estimates that there will need to be 3 pizzas for every 7 kids at his party.
We have to find the all statements that express this ratio.
What is Ratio?
A ratio indicates how many times one number contains another.
Now,
There are 3 pizzas.
Number of kids = 7
Hence, The ratio of pizzas to kids = 3 : 7 ( it can be read as 3 is to 7 )
And, For every 7 kids there need to be 3 pizzas.
The ratio of kids to pizzas = 7 : 3 ( it can be read as 7 is to 3 )
Therefore, The correct statements that express ratio are;
b. For every 7 kids there need to be 3 pizzas.
c. The ratio of kids to pizzas is 7:3.
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The cost of interest of a $500 loan for 12 months is $21.88. What is the interest rate charged for the loan per year?
5(4)+6a-9 I need the answer because its hard
Answer:
6a+11
Step-by-step explanation:
First you do 5 times 4 which is 20. Next you want to subtract 20 and 9 and you get 11. Lastly you want to rearrange the terms so you get the solution of 6a+11
8w2x + w2x you have to simplify but it polynomial equations
Answer:
9w2x.
Step-by-step explanation:
8w2x + w2x
= 9w2x.
Choose the equation that represents the graph below: (1 point)
-6
O y = x-3
O y = -x +3
Oy=-x-3
O y = x+3
Please help me out with this
Graph y=3/4x + 2
Answer:
i wrote how to below!
Step-by-step explanation:
okay since the y intercept is 2, put a dot on the point (0, 2)
now for the next one just substitute an easy value like 1 to the equation
y = 3/4(4) + 2
the 4 will cancel out the denominator then...
y = 3 + 2
y = 5
now put a point on (4, 5)
Answer:
answer in explanation
Step-by-step explanation:
(0,2)
(1,2.75)
(2,3.5)
(3,4.25)
(4,5)