Answer:
the population means are known the population variances are assumed equal but unknown
Step-by-step explanation:
If σ1= σ2 (= σ) but unknown , then the biased pooled or combined estimate of the common variance σ² ( the term common variance means that each population has the same variance ) is given by
Sp²= (n1-1) s1² + (n2-1) s2²/ n1+ n2- 2
So first assumption is correct.
When the population variances are assumed unequal and unknown
If σ1 ≠ σ2 but unknown
we use the sample estimates s1 and s2 to compute the standard error of the difference between the means.
S(x1`- x2`) = √s1²/ n1 + s2²/n2
So this is does not apply here.
2
v
What is the equation of a line that is parallel to y = -4x – 3 and shifted down 3 units?
Answer: [tex]y=-4x-6[/tex]
Step-by-step explanation:
Given
The equation of line is [tex]y=-4x-3[/tex]
The line which is parallel to the given line is [tex]y=-4x+c[/tex]
and shifted by 3 units down i.e. its y-intercept is 3 units below the given line
[tex]\therefore y=-4x-3-3\\\Rightarrow y=-4x-6[/tex]
Please help I will give brainliest to whoever gets it correct first!
While this may look like it's a lot to keep track of, its not too bad. We have 7 copies of (-8) in total. The 7 copies due to the exponent of 7. Nice work on getting the correct answer for the second part.
-----------
A further detailed breakdown:
(-8)^3 is the same as (-8)(-8)(-8) so we have three copies here
(-8)^4 is the same as (-8)(-8)(-8)(-8) and we have four copies
Overall, we have 3+4 = 7 copies total.
In Toss-N-Turn at the County Fair, contestants flip a fair coin and then spin the pointer of a spinner with seven equal sections, numbered 1–7. Contestants win if the coin lands heads up and the pointer lands on an even number.
If Paulina wants to win a prize, should she play Toss-N-Turn or a different game that has a theoretical probability of winning of 15
1
5
? Explain
Answer:
will for here to win a prize from a toss n turn or another game would be impossible first of all she has to get it a heads if she gets it a head that's good now the next thing she has to land it on a even number if she passes that she gets a prize but it is impossible for here to get a prize in a 1 out of 5 flip chances
Step-by-step explanation:
Answer:
i need points sorry
Step-by-step explanation:
Helpppppppppp /:;.:;(???()((;;
Answer:
721.64
Step-by-step explanation:
32.7*26.3=860.01
13.7*10.1=138.37
860.01-138.37=721.64
721.64 mi^2
Step-by-step explanation:
Area of the large rectangle A2 is
A2 = (32.7 mi)(26.3 mi) = 860.01 mi^2
Area of the small rectangle A1 is
A1 = (10.1 mi)(13.7 mi) = 138.37 mi^2
Therefore, the area of the shaded region is simply the difference between A2 and A1:
Area (shaded) = A2 - A1
= 860.01 mi^2 - 138.37 mi^2
= 721.64 mi^2
Please help ASAP
Select the correct answer.
A number is selected at random from the set ( 2,3,4,...10). Which event, by definition, covers the entire sample space of this experiment
A) The number is greater that 2.
B) The number is not divisible by 5.
C) The number is even or less that 12.
D) the number is neither prime nor composite.
E) The square root of the number is less than 3.
Answer:
A
Step-by-step explanation:
Find the equation of the axis of symmetry of the following parabola algebraically.
y=x^2-12x+34
how do i find the unit rate?
Answer:hgfjiughhitfi
Step-by-step explanation:
R5ztrxtfchhgtu
Please help ill make you the brainiest(please no link people)
Help me out please !!
Answer:
I'm thinking it's B
Step-by-step explanation:
I JUST NEED SOME HELP PLEASE!! ~0~
Find the RATIO and the EXACT VALUE of the given Tan B.
Answer:
Ratio: Tan B = 12/5
Exact value in degrees: [tex]67.38^{o}[/tex]
Step-by-step explanation:
SOH CAH TOA
Means Tan B means opposite/adjacent.
Tan B = 12/5
B = [tex]Tan^{-1} (\frac{12}{5})\\[/tex]
B = [tex]67.38^{o}[/tex]
What part of the circle is shown in purple?
Answer:
Radius
Step-by-step explanation:
I know the answer
Answer:
Radius
Step-by-step explanation:
Use 3.14 for π Round to the nearest 100th if necessary A ball has a diameter of 20 inches. What is its volume?
Answer:
4186.67 cubic inches
Step-by-step explanation:
Volume of a sphere = 4/3 π r³
π = 3.14
Diameter = 20 inches
Radius = r = Diameter/2 = 20 inches/2 = 10 inches
Volume of the sphere = 4/3 × 3.14 × (10 inches)³
Volume of the sphere = 12560 ÷ 3
= 4186.6666667 cubic inches
Approximately to the nearest hundredth = 4186.67 cubic inches
Therefore, the volume of the ball is 4186.67 cubic inches.
This is my first time using Brainly I don't know if I'm doing this correctly.
Answer:
x = -3
Step-by-step explanation:
A survey showed that 56% of car owners prefer four-door cars, 31% prefer two-door cars, and 13% have no preference. You ask 300 people. How many do you think will prefer four-door cars?
Answer:
168
Step-by-step explanation:
number that prefer four-door cars = percentage of car owners that prefer four-door cars x total number of people surveyed
56% x 300
0.56 x 300 = 168
How do you find the area of a triangle? Is it base x height divided by 2???
Answer:
yes The area of a triangle is b x h / 2 (base times height divided by 2)
Hi there!
»»————- ★ ————-««
I believe your answer is:
[tex]\boxed{\frac{b*h}{2}}[/tex]
You should be correct.
»»————- ★ ————-««
Here’s why:
The given formula for a triangle is similar to the formula for area of a square or rectangle. A triangle is basically a 'half-rectangle'.⸻⸻⸻⸻
[tex]\boxed{\text{Area of a triangle:}}\\\\A = \frac{b*h}{2}\\\\\boxed{\text{Key:}}\\\\\rightarrow \text{B - Base}\\\\\rightarrow \text{H - Height}[/tex]
⸻⸻⸻⸻
The area of a triangle is the half the product of the base and height of the triangle.⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
HELPPPP!!!!! Please
Answer:
180 D
Step-by-step explanation:
Help pls 40 points
Maths genius awakee!
Two experiments were carried out to find the relationship between the variables x and y. Both
experiments showed that the relationship between x and y is in accordance to 3(9^x) = 27^y and log2 y = 2 + log2 (x - 2). Find the value of x and y that satisfy both experiments.
Answer:
X=5/2 , y=2
Step-by-step explanation:
Sorry if I'm not correct
F4 ke?
HELP!!! Due in 20 minuets
Answer:
the one you have selected is right
Step-by-step explanation:
the pattern continues, what would be the eighth number in the pattern?4. 25, 28, 32, 37, 43 ______ PLS HELP ME
[tex]25,28,32,37,43,50,58,67.[/tex]
[tex]\boxed{The\:eighth\:number\:in\:the\:pattern\:is\:67.}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\orange{:}}}}}[/tex]
[tex]25, 28, 32, 37, 43,50,58,67\\ ✒ \: 25 + 3 = 28 \\ ✒ \: 28 + 4 = 32 \\ ✒ \: 32 + 5 = 37 \\ ✒ \: 37 + 6 = 43 \\ ✒ \: 43 + 7 = 50 \\ ✒ \: 50 + 8 = 58 \\ ✒ \: 58 + 9 = 67[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}[/tex]
Will mark brainliest ❤️
Answer:
The answer is A
Step-by-step explanation:
Well, there is an actual way of doing it but I forgot how to do it, my calculator got A so yeah, hope that helps
Alden has two toys. One toy has a mass of 188 grams, and the other has a mass of 127 grams
whats the rest of the question?
The radius of a circle is 7 yards. Determine the area of the circle.
Answer:
153.9380400258yds is the answer
help me please i’m stuck
Answer:
a)
x²+2x
b)
2x²-5x
c)
6x²+8x
d)
6x²-12xy
hopefully i understand it correctly because my engilish is not the best
WILL GIVE BRAINLIEST IF RIGHT IG....PLEASE get it RIGHT....
find the volume of a cone with a diameter of 12m and a height of 8m.
ANSWER CHOICES
oA. 96m^3
oB. 384 pi m^3
oC. 96 pi m^3
oD. 288 pi m^3
Answer:
V = 96 pi m^3
Step-by-step explanation:
V = (1/3) pi(r^2)h
Radius = 1/2(Diameter)
R = 1/2(12)
R = 6
Input.
V = (1/3) pi(6^2)8
Solve.
V = (1/3) pi(36)8
V = (1/3) 904.32
V = 301.44
V = 301.44/pi
V = 96 pi m^3
Answer:
The correct answer is option (C) 96π m³.
Step-by-step explanation:
As per given question we have provided that :
⟶ Diameter = 12 m⟶ Radius = 12/2 = 6 m⟶ Height = 8 mHere's the required formula to find the volume of cone :
[tex]{\longrightarrow{\pmb{\sf{V_{(Cone)} = \dfrac{1}{3}\pi{r}^{2}h}}}}[/tex]
➝ V = Volume➝ π = 22/7➝ r = radius➝ h = heightSubstituting all the given values in the formula to find the volume of cone :
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{3}\pi{r}^{2}h}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{3}\pi{(6)}^{2}8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{3}\pi{(6 \times 6)}8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{3}\pi \times {(36)} \times 8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{3} \times \pi \times 36 \times 8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \dfrac{1}{\cancel{3}} \times \pi \times \cancel{36} \times 8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \pi \times 12 \times 8}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} = \pi \times 96}}}[/tex]
[tex]{\implies{\sf{V_{(Cone)} =96\pi}}}[/tex]
[tex]\star{\underline{\boxed{\sf{\red{V_{(Cone)} =96\pi \: {m}^{3}}}}}}[/tex]
Hence, the volume of cone is 96π m³.
[tex]\rule{300}{2.5}[/tex]
Nine times a number, subtracted from the square of the number, is 36. Find the two numbers.
Answer:
- 3 and 12
Step-by-step explanation:
let n be the number , then
n² - 9n = 36 ( subtract 36 from both sides )
n² - 9n - 36 = 0
Consider the factors of the constant term (- 36) which sum to give the coefficient of the n- term (- 9)
The factors are - 12 and + 3 , since
- 12 × 3 = - 36 and - 12 + 3 = - 9 , then
(n - 12)(n + 3) = 0
Equate each factor to zero and solve for n
n - 12 = 0 ⇒ n = 12
n + 3 = 0 ⇒ n = - 3
The 2 numbers are - 3 and 12
What is the Quadratic Formula for y = x2 + 4x – 5
Answer:
i believe it is already written in the quadratic formula. there's nothing to change
Step-by-step explanation:
At Simba Travel Agency, the price of a climbing trip to Mount Kilimanjaro includes an initial fee plus a constant fee per meter. FFF represents the fee (in dollars) for climbing ddd meters. F=110+0.12dF=110+0.12dF, equals, 110, plus, 0, point, 12, d What is the increase in price for every 100100100 meters climbed?
Answer:
122fee/meter
Step-by-step explanation:
Given the expression for the initial fee plus a constant fee per meter expressed as;
F = 110 + 0.12d
Is d = 100m
Substiutte into the expression and get F
F = 110 + 0.12(100)
F = 110 + 12
F = 122
Hence the required increase in price is 122fee/meter
Answer:
110
Step-by-step explanation:
Mary Beth bought 45 oz of flour for her bakery. She used 17.3 oz to make a loaf of bread, and 0.83 oz for each muffin. How many muffins did Mary Beth make if she had 18.57 oz of flour left over?
Answer:
11
Step-by-step explanation:
this equation can be derived from the question
45 oz - 17.3 oz - 0.83x oz = 18.57 oz
where x = number of muffins made
combine like terms
45 oz - 17.3 oz - 18.57 oz = 0.83x
9.13 = 0.83x
x = 9.13 / 0.83
x = 11
10 mins to submit please help FAST
Answer:
Step-by-step explanation:
I got 408.33. dont know how to help you out
Which is grater and I don’t need any links please and thank you
-4 is greater since its negative then what you would call a smaller number is always greater
Answer:
-4
Step-by-step explanation:
i would pick ice cream though