Answer:
False
Step-by-step explanation:
By the Central Limit Theorem, as the sample size [tex]n[/tex] gets larger, the smaller the standard deviation [tex]\sigma[/tex] of the sampling distribution gets.
At the school store, 3 pens and 2 notebooks cost a total of $12, while 1 pen and 3 notebooks cost a total of $11. This can be represented by the system of equations, where x stands for the cost, in dollars, of pens, and y stands for the cost, in dollars, of notebooks.
What is the cost of one notebook?
A.$2.40
B.$2.75
C.$2.00
D.$3.00
Answer:
D
Step-by-step explanation:
the reason why is because if you put 3 dollars in for the notebooks right you have 3x3=9 and that one pen will be 2 dollars. Now you have 3×2=6 and then the two notebooks will be 6 and you add that and get 12. Hope this helps
Answer:
One notebook is $3.00
Step-by-step explanation:
3x + 2y = $12
1x + 3y = $11
Add -3y to the second equation
x = 11 - 3y
Substitute ( 11 - 3y ) for x in 3x + 2y = 12
3 ( 11 - 3y ) + 2y = 12
33 - 9y + 2y = 12
33 - 7y = 12
Add -33 to each side
-7y = -21
Divide each side by -7
y = 3
substitute 3 for y in x = 11 - 3y
x = 11 - 3(3)
x = 11 -9
x = 2
One notebook is $3.00
Pleas I really really need help
Answer:
3.5 gallons of gas
Step-by-step explanation:
If m = miles
And the equation is m = 40g
Then: 140 = 40g
40g/40 = 140/40
g = 3.5 gallons of gas.
The car used "3.5" gallons of gas.
Find the area of the shaded region.
Answer:
[tex] \boxed{ \tt\longrightarrow \: Area \: Of \: Shaded \: region \: =\boxed{ \tt 39 \: in²}}[/tex]
Step-by-step explanation:
Given:
The Dimensions of Parallelogram are 12 in.(Base) and 7 in.(Height)
And,
The Dimensions of Rectangle are 9 in.(Length) and 5 in.(Breadth).
To Find:
The Area of Shaded region
Solution:
When the dimensions of parallelogram and the dimensions of rectangle are given, we need to find the Shaded region using this formula:
[tex] \boxed{\tt \longrightarrow Area = (Parallelogram - Rectangle)}[/tex]
We know that the formula of Parallelogram is base*height[b×h] and the formula of rectangle is length*breadth[l*b] .
[tex] \tt\longrightarrow \: Area =B×h-l×b [/tex]
Put their values accordingly:
[tex]\longrightarrow \tt Area = (12 \times 7 - 9 \times 5)in {}^{2} [/tex]
Simplify it.
[Follow BODMAS Rule strictly while simplifying]
[tex] \tt\longrightarrow \: Area = (84 - 45 ) in {}^{2} [/tex]
[tex] \tt\longrightarrow \: Area = 39 \: {in}^{2} [/tex]
Hence, the Area of Shaded region would be 39 in² or 39 sq. in. .
[tex] \rule{225pt}{2pt}[/tex]
I hope this helps!
solve for x!!!!!!!!!!
Answer:
8 10
Step-by-step explanation:
maybe this will help you
Solve the following system of equations using the elimination method. 8x – 5y = 5 –8x – 6y = 6 Question 3 options: A) (0,1) B) (0,–1) C) (2,–3) D) (–2,3)
Answer:
B: x = 0, y = -1
Step-by-step explanation: Hope it Helps!
Answer:
(0,-1)
Step-by-step explanation:
8x – 5y = 5
–8x – 6y = 6
-11y = 11
/-11 /-11
y = -1
8x – 5y = 5
8x - 5(-1) = 5
8x - (-5) = 5
8x + 5 = 5
- 5 - 5
8x = 0
/8 /8
x = 0
8x – 5y = 5
8(0) - 5y = 5
0 - 5y = 5
-5y = 5
/-5 /-5
y = -1
(x,y) ==> (0,-1)
Hope this helps!
Help Iḿ stuck on this problem
Answer:
774
Step-by-step explanation:
38*15=570
17*12=204
570+204=774
the numbers of motor vehicle fatalities in the united states for the years
plzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help me
Answer:
248
Step-by-step explanation:
I'm not completely sure but hope this helps
Answer:
220 cm²
Step-by-step explanation:
area of rectangle:
Length * Width
18 * 11
198 cm²
Triangle area:
1/2 * base * height
1/2 * (18-7)(15-11)
1/2 * 11 * 4
22 cm²
So total area: 198 cm² + 22 cm² = 220 cm²
Helpp please find the value of s! I will give brainlist
We have :
s - 39⁰+ s - 9⁰ = s + 29⁰
s + s - s = 29⁰ + 9⁰ + 39⁰
s = 77⁰
Answer: 77⁰
Ok done. Thank to me :>
What is -45+30-(-60)=?
Answer:
45
Step-by-step explanation:
-45 + 30 gives you -15. When subtractinf a negative number, it actually turning into addition/positive. This changes it into -15 + 60, which is 45.
Answer: 45
Step-by-step explanation:
-45+30-(-60)=
First, times the negative 60 with the negative outside the parenthesis.
-45+30+60
60+30=90
90-45=45
Answer: 45
A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of 444 points. What proportion of exam scores are between 828282 and 85.685.685, point, 6 points? You may round your answer to four decimal places.
Answer:
0.2379
lmk if im wrong :)
Approximately 0.2200 or 22.00% of the exam scores are between 82.2 and 85.6.
To find the proportion of exam scores between 82.2 and 85.6, we need to calculate the z-scores for both values and then use the standard normal distribution table (also known as the z-table) to find the proportion.
The z-score for a value x in a normal distribution with mean μ and standard deviation σ is given by the formula:
z = (x - μ) / σ
where x is the value, μ is the mean, and σ is the standard deviation.
Let's calculate the z-scores:
For x = 82.2:
z₁ = (82.2 - 80.2) / 4 = 2 / 4 = 0.5
For x = 85.6:
z₂ = (85.6 - 80.2) / 4 = 5.4 / 4 = 1.35
Now, we can find the proportion of scores between these z-scores using the z-table. The table gives us the cumulative probability up to a certain z-score.
From the z-table, the cumulative probability for z₁ = 0.5 is approximately 0.6915, and the cumulative probability for z₂ = 1.35 is approximately 0.9115.
Now, we can find the proportion of scores between these two z-scores:
Proportion = P(0.5 ≤ z ≤ 1.35)
= P(z ≤ 1.35) - P(z ≤ 0.5)
= 0.9115 - 0.6915
≈ 0.2200
So, approximately 0.2200 or 22.00% of the exam scores are between 82.2 and 85.6.
Learn more about z-scores click;
https://brainly.com/question/32011298
#SPJ3
help me pls ヾ(•ω•`)o
Now,
Volume = L × B × H
Volume = (L × B) × H
Volume = Area × H
Volume = 10/3 × 7/5 units
V = 70/15 = 14/3 or 4.7 cubic units
Thus, The answer is 14/3 or 4.7 cubic units
-TheUnknownScientist 72
2) Find the total cost (in dollars) of buying:
a) 8 pears at 50 cents each
b) p pears at 50 cents each
c) p pears at y cents each
Answer:
a=4
b=0.5p
c=py
Step-by-step explanation:
a) 8*0.5= 4
b) p*0.5= 0.5p
c) p*y= py
Hope this helps! :)
are -8h - 3.5 and -0.5(16h - 7) equalivalent expressions?
Answer: Yes because they both have the same total
Step-by-step explanation:
PLEASE HELP ME QUICKKK, FIRST CORRECT PERSON GETS BRAINLIEST
Answer:
answer d and e
Step-by-step explanation:
First, you need to figure out the radius of B.
As radius of A is 6 in, 20% of 6in would be 1.2in. So total radius of B = 6+1.2 = 7.2
Now you get the radius of B, calculate th area of B using the formula πr^2.
= π(7.2)^2 = 162.86 = area of B
Now, all answers except D and E is smaller than B. So, the answer would be D and E.
Answer:
A, E
Step-by-step explanation:
The radius of Circle B is 20% greater than 6 inches, so is ...
r = (6 in)(1 +20%) = 1.2×6 in = 7.2 in
The area of Circle B is ...
A = πr²
A = π(7.2 in)² ≈ 162.86 in²
The offered answer choices (and the area of Circle B) in order from least to greatest are ...
[B]51.84, [C]113.04, [F]148.49, [D]162.78,
(circle B)162.86,
[A}189.31, [E]203.15
Choices A and E are greater than Circle B's area.
A survey of 400 randomly selected high school students determined that 925 play organized sports.
A. What is the probability that a randomly selected high school student plays organized sports?
B. Interpret this probability.
Answer:
It is 43%.
Step-by-step explanation:
I took the 400 and divided it by the 925. I got 0.43 and moved the decimal point over 2 spots and the answer is 43%.
Have a good day!
please help. its on zearn name the coordinates of each shape
Answer:
circle: 2, 1/2
square: 1 1/2, 3 1/2
triangle: 0, 4 1/2
Answer:
Square X-coordinate: 1 and 1/2
Square Y-coordinate: 3 and 1/2
Triangle X-coordinate: 0
Triangle Y-coordinate: 4 and 1/2
Step-by-step explanation:
Suppose you are dealt 6 cards from a standard 52-card deck. What is the probability that
you are dealt a 4-of-a-kind and a pair?
Answer: Approximately 0.00004597583714
===================================================
Explanation:
Four-of-a-kind is when you get four cards of the same value. One example is if we got four aces. Any four-of-a-kind already has two pairs built into it. I'm assuming your teacher wants four-of-a-kind and another different pair (we'll have 6 pairs all together).
In any suit there are 13 unique cards. So there are 13 choices to fill the first four slots to set up the four-of-a-kind.
-------------
After the four-of-a-kind is formed, we have 13-1 = 12 unique cards left in any given suit. Once that fifth card is chosen, we then have 4 C 2 = 6 ways to select that final card such that we get another pair. I'm using the nCr combination formula since order doesn't matter. The steps to calculating this value (and the other nCr value mentioned later) is shown in the attached image below.
Multiplying those values gets us 13*12*6 = 936 different six card hands such that we get four-of-a-kind and a different pair.
-------------
This is out of 52 C 6 = 20,358,520 different six card hands.
Divide the two values found
936/(20,358,520) = 0.00004597583714
In Figure 1, the area of square A is 9 square units, the area of square B is 16 square units, and the area of square C is 25 square units.
In Figure 2, the area of square D is 36 square units and the area of square E is 64 square units.
What is the area of square F in Figure 2?
A.
110 square units
B.
100 square units
C.
90 square units
D.
80 square units
Answer:
b) 100 square units as 36 add 64 is 100
Please find the value of X!
Answer:
or,180=3x
or,x=180+3
or,x=183 answer
Answer:
54
Step-by-step explanation:
there are 2 ways
(180 - 18) ÷ 3 = 54
(360-18-18) ÷ 6 = 54
same answer
HELPPPP
In the diagram to the right, GKNM~VRPT.
Find the value of x. Give the scale factor of the left polygon to the right polygon.
Answer: Sorry, I had a different problem than you so this answer isn't correct for the OP but hopefully it shows you how to solve.
x=27/5
The scale factor is 7:3
Step-by-step explanation:
46.8 divided by 1.2 equals
Answer: 39
Step-by-step explanation: We have to move the decimal one place to the right to make 1.2 a whole number, so 12. You do the same thing to 46.8, so you get 468. Then you divide from there. 12 can go into 46 3 times. 12 x 3 = 36. you subtract to get 10, then bring down your 8, to get a new number of 108. 12 can go into 108 9 times. 12 x 9 = 108. Then you have a remainder of 0. Your product is 39.
The first triangle is dilated to form the second triangle Select True or Flause
Answer:
Statement 1 is false, statement 2 is true.
Step-by-step explanation:
The triangle has been dialated by a scale factor of 2.5
whats this v+2=v+4 please help me
Answer:
this should help
Step-by-step explanation:
U dont have to believe me ;-;
i want to know what 24 multipled by 1.5 is
Answer:
36
Step-by-step explanation:
24×1.5
tips to answer quickly:
1.5 is the same as 1 + [tex]\frac{1}{2}[/tex]
(1×24)+([tex]\frac{1}{2}[/tex]×24)
24+12
36
Is y = 3/7x -4 is it proportional or nonprotional
Answer:
Not proportional
Step-by-step explanation:
Not proportional because the line has to go through the origin
The y-intercept has to be 0, but here it is given as -4
The graph goes 4 units below the origin on the y-axis.
The correct equation would be y = 3/7x
-Chetan K
please Help Me answer this question
Benjamin is four years younger than Kevin Williams for years less than twice Benjamin’s age and William is 22 how old are Kevin and Benjamin
A hardware store stocks 85 reels of garden hose, each
containing 30 m of hose. How many kilometres of
garden hose are stocked by the store?
It's given that, the hardware store stocks 85 reels of garden hose. Each of them measure to be of 30 m.
Total length of hoses = 85 × 30
= 2550 m
= 2.550 km
= 2.5 km (approx.)
2.5 km of garden hose are stocked by the store.
f(x) = 3x^2 - 9x + 2
What's the axis of symmetry?
What's the coordinate of the vertex?
Answer:
1) Axis of symmetry = [tex]\frac{3}{2}[/tex]
2) Vertex form = [tex]y=3(x-\frac{3}{2} )^{2} -\frac{19}{4}[/tex]
Rewrite in vertex form and use this form to find the vertex (h,k).
[tex](\frac{3}{2} ,-\frac{19}{4} )[/tex] (coordinates of the vertex)
Step-by-step explanation:
Vocabulary:
Axis of symmetry- A line that passes through a figure in such a way that the part of the figure on one side of the line is a mirror reflection of the part on the other side of the line.
Vertex- The point on an angle where the two sides intersect.
Answer
Thats the answer below!
Step-by-step explanation: