Answer:
(8.1744 ; 9.0056) ;
With 95% confidence, we can say that the value of the true mean proportional limit stress of all such joints is centered around this value.
Step-by-step explanation:
Given that :
Sample size, n = 14
Mean, xbar = 8.59
Standard deviation, s = 0.72
Tcritical at 95%, df = 13 - 1 = 12 confidence level = 2.160
Confidence interval :
Xbar ± Margin of error
Margin of Error = Tcritical * s/sqrt(n)
Margin of Error = 2.160 * 0.72/sqrt(14)
Margin of Error = 0.4156446
Lower confidence boundary :
8.59 - 0.4156 = 8.1744
Upper confidence boundary :
8.59 + 0.4156 = 9.0056
Confidence interval : (8.1744 ; 9.0056)
Hence, we can conclude with a confidence of 95% that the true mean proportional limit stress of all joints exists within the interval above.
Pls help me with this
Answer:
D
Step-by-step explanation:
Its d because if she feeds her dog 1/8 every day for 3 days 3 times 8 is 24. I'm not very good at explaining things but its 24 days
Two numbers that multiply to 16 and add to negative 8
(13x+2)+(7x-10) add and find the answer
Answer:
[tex](13x + 2) + (7x - 10) \\ = 13x + 2 + 7x - 10 \\ = 13x + 7x + 2 - 10 \\ = 20x - 8[/tex]
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
Answer:
It should be 20x-8
Step-by-step explanation:
(13x+7x)(2-10)
add like terms and get..
20x-8
the 20% tip on a $8 sandwich
Answer:
Tip of $1.60
The total is $9.60
Step-by-step explanation:
(20% × $8) + $8
$1.60 + $8
$9.60
A line has a slope of 1/2 and passes through the point (6,2).
a) Write the equation of this line in point-slope form
(b) What is the y-intercept of this line?
Answer:
a) y-2=1/2(x-6) b) The y-intercept of this line is -1.
Step-by-step explanation:
y-y1=m(x-x1)
y-2=1/2(x-6)
------------------
y=1/2x-6/2+2
y=1/2x-3+2
y=1/2x-1
y=mx+b where m=slope and b=y-intercept.
what is the value of tan0 in the unit circle below
Answer: ( 60 ) , or ( -4)
Step-by-step explanation:
Answer:
√3/3
Step-by-step explanation:
tan=sin/cos=1/2/sqrt(3)/2=1/sqrt(3)
hope it helps
have a great day
Please help! What is the Area of the Triangle?
Answer and explanation please! <3
Answer:
area of a triangle is equals to sum of all side
Answer:
5√5
Step-by-step explanation:
the area of the triangle is, "base len x height"
the base in here is √1^2 + 2^2 = √5
its height is √4^2 + 3^2 = 5
so the area is √5 x 5 = 5√5
VERY EASY, WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.
the answer is (6,1) aka. 3rd answer
15 points math :D yayayayayya
Answer:
The imagine isnt loading....
Step-by-step explanation:
Can you help me, please?
Answer:
The first one is two over four
Step-by-step explanation:
How are land parcels valued?
Which of the following numbers would be to
the left of the number -1 on a number line?
8
4
0
-0.5
-4
Answer:
-4
Step-by-step explanation:
Numbers decrease on a number line as you go left. So, to find a number to the left of -1, you need to find a number that is smaller. Since negative numbers decrease in value as they get further from 0, -4 must be smaller than -1. All other values listed will be to the right of -1.
Find the midpoint of the segment with the following endpoint (9,2) and (5,5)
Answer:
(7, 3.5)
Step-by-step explanation:
find the distances between the x and y
9 and 5 are 4 apart, and 2 and 5 are 3 apart
divide those distances by 2
4/2 = 2, 3/2 = 1.5
add those distances to the smaller of the x and y
5 + 2 = 7, 2 + 1.5 = 3.5
those two numbers are the midpoint (7, 3.5)
show proof and work for brainliest
What is the value of arccos(−1/2)in radians?
Answer:
2.0943951 radians
Step-by-step explanation:
help asap i am struggling see image for problem
Answer:
p = 132 - 30d
Step-by-step explanation:
Here, we can plug in x = 6 into the equation provided at the end of the problem.
p = 6[25 - (3 +5d)]
p = 150 - 18 - 30d
p = 132 - 30d
Please help! What is the area of this figure?
Answer and explanation please! <3
Answer:
19 units²
Step-by-step explanation:
Divide into three shapes:
Large rectangle BEFA
Large triangle - BCE
Small triangle - CDE -
BEFA = 4x3 = 12
BCE = 1/2x4x2 = 4
CDE = 1/2x3x2 = 3
12+4+3=19
Find the value of x
Answer:
x=80
Step-by-step explanation:
(x+30)=110 because they are vertically opposite angles.
x+30=110
x=110-30
x=80
Answer:
x = 80 degrees
Step-by-step explanation:
x + 30 = 110
- 30 = -30
x = 80 degrees
please help me I will give a brainlist
Answer:
-3,2
Step-by-step explanation:
B
Answer:
B
Step-by-step explanation:
The x coordinate always goes first, and then the y coordinate comes next. An easy way to remember is "walk before you fly." In this case, the x coordinate is -3, and the y coordinate is 2. So: (-3,2)
A chi-square goodness-of-fit test will be performed using a simple random sample of 100 homes to investigate
whether the proportion of homes heated with each source is the same as what is reported by the newspaper.
Which of the following represents the alternative hypothesis of the test?
А
The proportions for the different heating systems match those reported by the newspaper.
B
At least one of the heating source proportions is the same as the corresponding proportion
reported by the newspaper.
c) The heating sources are not evenly distributed between homes.
D
At least one of the heating source proportions is different from the proportion reported by the
newspaper
E
Wood stove heating represents the highest proportion of heating source.
Answer:
D At least one of the heating source proportions is different from the proportion reported by the newspaper.
Step-by-step explanation:
H o: proportions are the same as the model
H a: at least one proportion is not the same
Simplify and find the undefined values of 4x^4+6x^3/6x^2+9x .
Answer:
x^5+4x^4+9x is what I would simplify it to.
What is the value of A ?
[tex]4^{2}=3*a\\16=3a\\a=5\frac{1}{3}[/tex]
You are given two functions f(x) and g(x). How has the graph of g(x) changed from that of f(x)?
f(x) = log (x + 1)
g(x) = log (x - 2) + 5
A)
g has been shifted up five units and to the left two units from f
B)
g has been shifted up five units and to the right three units from f
C)
g has been shifted down five units and to the left two units from f
D)
g has been shifted down five units and to the right three units from f
Answer:
C. g has been shifted down five units and to the left two units from f
Step-by-step explanation:
Sana makatulong
If someone makes as many slices of toast as possible in 4 minutes and 40 seconds, how many slices do think they can make
Answer:
If they can do x slices per second, they could do 280x slices
Step-by-step explanation:
4 min 40 sec -> 280 secs
280 * 5 = 1400
please help me asap
Answer C
Step-by-step explanation:
The Adams family drove 319 miles in 5.5 hours. At this same rate, how many miles would they drive in
3 hours?
A:164 B:174 C:180 D:144
PLEASE HELP!!
Solve for m
m+7=3+m+4
Answer:
M = -7
Step-by-step explanation:
It makes sense if you replace it in for M! Hope this helps and have a great day!
Plans Math Fourth grade > W.4 Parallel sides in quadrilaterals 58M How many pairs of opposite sides are parallel? no pairs 1 pair 2 pairs Submit
Answer:
2 pairs
Step-by-step explanation:
The north & south sides are parallel and the east & west are parallel.
The area of the floor of a cubical room is 49
[tex] {m}^{2} [/tex]
Find the area of 4 walls
Step-by-step explanation:
Since its a cube, Area of Floor = Area of Wall (Area of Square)
Area of 1 wall =
[tex]49 {m}^{2} [/tex]
Area of 4 walls =
[tex]49 \times 4 \\ = 196 {m}^{2} [/tex]
A cubical is a 3D square where all the sides are the same length.
The area of the floor is 49 square metered.
Since all sides are equal the area of the walls would also be 49 square meters each.
The area of the 4 walls would be 49 x 4 = 196 square meters.
HELP PLSSS giving out the brainliest answer !!! help asap !!!
Answer:
A 45/28
Step-by-step explanation: because a tangnt means a a straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point. so 45 and 28 are on it so it has to be A