Answer:
The standard error of the mean remains unchanged.
Step-by-step explanation:
Given that:
The standard error (S.E) of the mean [tex]= \dfrac{\sigma}{\sqrt{n}}[/tex] with is independent of confidence coefficient.
The margin of error [tex]E = z \times S.E[/tex]
This explains the claim that as the confidence coefficient reduces, the z-value also reduces, so as the Margin of error (E) but the standard error will always remain unchanged.
i.e.
From the question;
sample size n = 100
standard deviation = 1
mean = 3.0
The standard error (S.E) of the mean [tex]= \dfrac{1}{\sqrt{100}}[/tex]
= 0.1
So, if the confidence coefficient is reduced to 0.80, the standard error of the mean remains unchanged.
A wise man once said, “400 reduced by 3 times my age is 163.” What is his age? ( I need the step by step equation to solve this)
Answer: the wise man is 79
Step-by-step explanation:
400 - 3x = 163
400–163 =3x
237 = 3x or 3x = 237 or x = 79…
If 100 feet of fence is used to enclose a rectangular yard, then the resulting area is given by
A=x(-x+50) where x feet is the width of the rectangle and feet is the length. Determine the length and width that give maximum area.
Answer:
Step-by-step explanation:
Which number line shows the solution of 4x-36<-12 HELP PLZZZZZZ
Answer:
A
Step-by-step explanation:
Please mark brainliest.
Write an equation of the line that passes through each pair of points (- 2, - 3), (4, 5)
Answer:
y= 4/3x -1/3
Step-by-step explanation:
Find slope: y2-y1/x2-x1 = 5-(-3)/4-(-2) = 8/6 = 4/3
Use point slope to find the equation:
y - y1 = m ( x - x1 )
y - (-3) = 4/3 ( x - (-2))
y = 4/3x + 8/3 + (-3)
y = 4/3x + 8/3 - 9/3
y= 4/3x -1/3
TS is an angle bisector. If m∠RTS=x+10 and m∠UTS=2x+5, find m∠RTU.
answer choices below
30°30 degrees
15°15 degrees
80°80 degrees
5°
Answer:
m∠RTS= 15°, m∠UTS= 15°, m∠RTU= 30°
Step-by-step explanation:
Since TS bisects RTS and UTS, that means the two angles are equal to each other. So let's find x first.
x+10=2x+5, subtract x to both sides
10=x+5, subtract 5 to both sides
x=5
Since RTU is basically RTS plus UTS, let's add the two angles together
x+10+2x+5, combine like terms
3x+15
Then we can plug in 5 for x
3(5)+15
15+15
=30
So, RTU is 30 degrees
Answer:
kjndnsadnsdnasnldnkasbdkbaskbjdbLol i dont caewnsnasdHBsadHKUsadkhsdkkbhaSKHChASKUCDKJGCHakbsDKskbhaKHDHU
Step-by-step explanation:
You have $500, sale price is $435. How much change will you get
Answer:
go to sleep its 11:23 also u will get
$65 dollars pls mark me brainleist
Step-by-step explanation:
6) Choose which postulate proves the triangles congruent.
Answer:
SAS(Side.Angle.Side
Step-by-step explanation:
since x is mid point of pr and qs so px=xr and x is midpoint of qs so qx=sx,
and two lines intercept so angles made on point x are equal.....hence 2 sides and one angle proved so triangles are equal
The postulate that can be used to prove that triangle QXP and triangle SXR are congruent to each other is: SAS Congruence Theorem,
Recall:
Two triangles are congruent by the Side-Angle-Side Congruence Theorem, if two sides and one included angle of one triangle are congruent to two sides and the corresponding included angle in the other triangle.Since X is a midpoint of QS and RP, therefore:
[tex]PX \cong RX\\\\QX \cong SX\\[/tex]
Also,<PXQ = <SXR (vertical angles are congruent)
Thus, triangle QXP and triangle SXR are congruent by SAS.Therefore, the postulate that can be used to prove that triangle QXP and triangle SXR are congruent to each other is: SAS Congruence Theorem,
Learn more here:
https://brainly.com/question/25126660
HELP I WILL RATE !!!!!!!
No picture, nothing to rate here.
what ratio represents the tangent of
Answer:
Step-by-step explanation:
15/8
give me brainliest pls
can someone help me
9514 1404 393
Answer:
M = 7x² +21
Step-by-step explanation:
Subtract the unwanted terms on the left from both sides.
(-7x² +6x -16) + M = 6x +5
M = 6x +5 -(-7x² +6x -16)
M = 7x² +21 . . . . simplify
$4200 with a 35% markdown
Answer:
$2,730.00
Step-by-step explanation:
35% of $4,200 is $1,470. Subtract 1470 from 4200 to get $2,730.00
~theLocoCoco
PLEASE HELP WILL MARK BRAINLEIST
Answer:
The second one
Step-by-step explanation:
because 1•4=4 and 2•2=4
adding fractions with unlike denominators 1/3 + - 2/7
Answer:
1/21
Step-by-step explanation:
Changing operations to eliminate negative numerators the equation becomes
=1/3−2/7
With unlike denominators find the Least Common Denominator (LCD)
LCD = 21
Multiplying numerators and denominators to get the LCD in all fraction denominators
=1×7/3×7 −2×3 /7×3
Then rewriting the equation with the equivalent fractions
=7/21−6/21
With like denominators we can operate on just the numerators
=7−6/21
=1/21
Answer:
you're correct.
Step-by-step explanation:
10 points pls help me this is urgent if i don’t do this i won’t pass
Answer:
Here's something to help you
Step-by-step explanation:
I'm using the second question as an example.
To find the Unit Rate, you have to divide the amount of money by the amount of whatever the product is
5.99/8= 0.74875
Since the question says to round it to the nearest hundredth, that means the price per unit (unit rate, or the price for one battery here) would be about $0.75. Simple, right?
What are the zeros of the function
Answer:
(1,0)
Step-by-step explanation:
A.K.A the y and x intercepts you might need to do a little more math you get the y intercept tho
Using the graphing function on your calculator, find the solution to the system
of equations shown below.
2y- 4x= 6
y- 2x=7
A. No solution
B. More than 1 solution
C. x= 4, y=-2
D. X= -1, y= 1
what is an array in multiplication?
Answer:
An arrangement of objects, pictures, or numbers in columns and rows is called an array
Answer:
An array is a way to represent multiplication and division using rows and columns. Rows represent the number of groups. Columns represent the number in each group or the size of each group
PLEASE I NEED HELP RIGHT NOW! THANK YOU!
For each equation, tell whether it is always, sometimes, or never true. Explain your reasoning in words.
Answer:
For d: x=2
Step-by-step explanation:
Lets +1 on both sides so 9+1=10. Now the equation is 5x=10
Divide 10÷5=2
The sum of Katelynn’s parents' ages is 80. Katelynn’s father is 4 years older than her
mother. Write and solve an equation to determine both her parents’ ages.
Answer:
Step-by-step explanation:
M=Mum
D=Dad
K=Katelynn
M+D=80
The rest
the subway train can hold a 792 people on Tuesday 56941 people rode the subway how many trains could 56941 people how many people would be left over
Answer:
56,149 would be left over
Step-by-step explanation:
56,941-792=56,149
What is the slope of the line that passes through the points (a, b) and (c, b)?
Line segment pq shown on the graph below, is rotated 90 counterclockwise about point q to form pq
Answer:
this isn’t a 100% guaranteed correct answer but maybe the second option saying “PQ and P’G’ are parallel”
(i’m doing the test rn)
Answer: PQ and P’Q’ are perpendicular (3rd option)
Step-by-step explanation: they’re both perpendicular
When someone donated 14 gallons of paint to Rosendale Elementary School, the fifth grade decided to paint a mural. They split the gallons equally among the four classes.
b. how much paint will three classes use?
c. If 4 students share a 30-square footwall equally, how many square feet of the wall will be painted by each student?
d. what fraction of the wall will each student paint?
Answer:
Step-by-step explanation:
So, first we can do 14/4 which is 3.5
Each class uses 3.5 gallons
For (B), we can do 3.5 * 3 which equals 10.5 gallons
For (C), we can do 30÷4 which is 7.5 square feet
For (D) they each paint 1/4 of the wall
Find the area. Round to the nearest hundredth if necessary
Answer:
138.16
Step-by-step explanation:
a=3.14 x 44
the formula is a=pie x r squared
they have given you diameter so, it is simply pie x diameter
or 3.14 x 44
Please help! 35.1 x 8.4 = ??
Answer:
294.84
should be correct, I used a calculator.
During basketball practice, Mai attended 40 free trows and was successfully on 70% of them. How many successfully trows did she make?
Answer:
28
Step-by-step explanation:
40×70% or 40×.7= 28 so 28 is 70% of 40
Please answer this correctly without making mistakes
Answer:
35% off
Step-by-step explanation:
Simplify the following expression: -4(-4d - 5)
Answer:
4⋅(4d+5)
Step-by-step explanation:
In an election for school president, the loser received 70% of the winner's votes. If 969 votes were cast, how many did each receive?
Answer:
The ans would be 291 (however we can round this off to 290 as no can partially vote as 0.1)
Step-by-step explanation:
We can easily find the loser's vote by-
70% of 969= 678.9
now, all we need to do is find the winners vote
we know that the total no. of votes= 969 & we know the no. of votes loser got
so, subtracting the losers vote from 969 would give us the remaining no. of votes (the winner's votes)....so,
969-678.9=290.1
we can round this off to 290
Ms. Mickelson is purchasing some baseball shirts for her son’s baseball team. She will pay $10.50 for each shirt plus a one time fee of $20 for the team logo design. Which table best represents y, the total cost of x number of shirts?
Answer:
D.
Step-by-step explanation: {y1=mx1+b}
x1 l y1
------------------
8 l 104 <------------Answer
12 l 146
l
l
m = 10.5
b = 20