Answer:
the answer is 126 because 9 times 14 is 126
6300m into kilometers
Answer: 6.3 km
Step-by-step explanation:
So we know that to convert meters into km we have to divide the length value by 1000
So:
6300 ÷ 1000 = 6.3
Therefore the answer is 6.3
Two teaching methods and their effects on science test scores are being reviewed. A random sample of 18 students, taught in traditional lab sessions, had a mean test score of 78.3 with a standard deviation of 6.4 . A random sample of 11 students, taught using interactive simulation software, had a mean test score of 84.3 with a standard deviation of 5.3 . Do these results support the claim that the mean science test score is lower for students taught in traditional lab sessions than it is for students taught using interactive simulation software? Let μ 1 be the mean test score for the students taught in traditional lab sessions and μ 2 be the mean test score for students taught using interactive simulation software. Use a significance level of α=0.1 for the test. Assume that the population variances are equal and that the two populations are normally distributed.
Step 2 of 4 :
Compute the value of the t test statistic. Round your answer to three decimal places.
Answer:
the value of the t test statistic is - 3.419
Step-by-step explanation:
Given that;
n₁ = 18, u₁ = 78.3, s₁ = 6.4
n₂ = 11, u₂ = 84.3, s₂ = 5.3
α = 0.1
Now The hypothesis are;
H₀ : u₁ = u₂
H₁ : u₁ < u₂
To compute the value of the t test statistic;
t = [(x₁ - x₂) / s × √(1/n₁ + 1/n₂)]
where
s = √ [ ((n₁-1) × s₁² + (n₂ - 1 ) × s₂²) / ( n₁ + n₂ - 2)]
s = √ [ ((18-1) × 6.4² + (11 - 1 ) × 5.3²) / ( 18 + 11 - 2)]
s = √ [ (7 × 40.96 + 10 × 28.09 ) / 27 ]
s = √ [ (286.72 + 280.9) / 27 ]
s = √(567.62/27)
s = √21.0229
s = 4.585
Now t test statistics t = [(x₁ - x₂) / s × √(1/n₁ + 1/n₂)]
t = [(78.3 - 84.3) / 4.585 × √(1/18 + 1/11)]
t = -6 / (4.585 × 0.3827)
t = - 6 / 1.7546795
t = - 3.419
Therefore the value of the t test statistic is - 3.419
as as level of significance α = 0.1
df = 18+11-2 = 27
∴ T(csal) = t(0.1, 27) = -1.313
That is
t(statistics) < t(cal)
{ - 3.419 < -1.313 }
MONEY Amanda has $31 in her purse. She pays $6 for lunch. Which expression represents this situation?
plz tell me the answer!
Given: Point K is between points H and J, HK = x − 5, KJ = 5x − 12, and HJ = 25. Find the value o
Answer:
[tex]\huge\boxed{\sf x = 7}[/tex]
Step-by-step explanation:
According to the given statement
HJ = HK + KJ
Given that HJ = 25 , HK = x - 5 and KJ = 5x-12
[tex]\sf 25 = x-5+5x-12[/tex]
Adding like terms
[tex]\sf 25 = 6x-17\\Adding \ 17\ to\ both\ sides\\25 + 17 = 6x\\42 = 6x\\Dividing \ both \ sides \ by \ 6\\7 = x\\OR\\x = 7[/tex]
A construction company has eight boxes of shingles with one thousand shingles in each stack. if they need 50000 shingles, do they have enough? Explain how you know
Please help me out ASAP
Answer:
[tex]26^9[/tex]
Step-by-step explanation:
[tex]26^1 *26 ^8\\=26^{1+8} \\=26^{9}[/tex]
Use the Pythagorean Theorem to find the length of the leg in the triangle shown below. The figure shows a right triangle with one leg marked 15. The hypotenuse is marked 39.
Answer:
36
Step-by-step explanation:
you would just to 39^2-15^2 which is 1296 and the square root of that is 36 so 36 would be the answer
Which of the following is the method used to determine whether or not a proportion is
true?
O Inverse operations
O Simplifying
O Prorating
O Cross multiplication
Answer:
Cross multiplication
Step-by-step explanation:
Find the difference.
52.74 - 14.6
ao
Answer:
38.14
Step-by-step explanation:
Step 1: Write out equation
52.74 - 14.6
Step 2: Subtract
38.14
Solve s=2b+lw for l. Show all work
Answer:
l = (2b-s)/w
Step-by-step explanation:
s=2b+lw
s-2b=lw
(s-2b)/w= l
Which of the following statements says that a number is between -3 and 3? A. |x|< 3 B. |x| =3 C. |x| >3
Answer:
A
Step-by-step explanation:
|x|< 3 translates to
x < 3 AND -x < 3
which simplifies to
x < 3 AND x > -3
so, yes, -3 < x < 3
I need help please the question is in the picture.
Answer:
5x+12=42
x=6
Step-by-step explanation:
8+x+x+2+3x+2=42
5x+12=42
5x=42-12
5x=30
x=6
I need to do 11-117 every other odd. Can someone list the every other odd till i get to 117
Answer:
11,15,19,23,27,31,35,39,43,47,51,55,59,63,67,71,75,79,83,87,91,95,99,103,107,111,115
Step-by-step explanation:
I think this is what you wanted
Write down at least five number
pairs to solve the equation
(r - 2)(s + 1) = 100.
Answer:
(52,1)
(4,49)
(27,3)
(6,24)
(7,19)
(22,4)
key: (r,s)
A news report suggested that an adult should drink a minimum of 64 fluid oz of water per day.
Based on this report, determine the minimum amount of water an adult should drink, in pints,
per day. (1 pint= 16 fl oz)
Answer:
4 pints
Step-by-step explanation:
Because 16x4=64
Can someone please help me
Answer: B
Step-by-step explanation:
To find the factors, you know that they are known as the zeros. The zeros are located on the x-axis, where the graph crosses. On the graph, we see that the parabola crosses the x-axis at x=-5 and x=-1. Unfortunately, those are not displayed in our answer choices.
We know that each factor is set equal to 0 to get x=?. With this knowledge, let's make it so that we can get factors.
x=-5 [add both sides by 5]
x+5=0
Now, we see that it is a factor, (x+5).
x=-1 [add both sides by 1]
x+1=0
Now, we see that it is a factor, (x+1).
Our final answer is (x+5) and (x+1) or (x+1) and (x+5).
find the area of the given triangle a = 19, c= 14, B=60°. Round your answer to the nearest tenth.
Answer: 115.2 units²
Step-by-step explanation:
Since you know the length of two sides and the measure of the included angle, you can use the following trig formula:
[tex]Area=\dfrac{1}{2}ac \sin B[/tex]
Given: a = 19, c = 14, B = 60°
[tex]A=\dfrac{1}{2}(19)(14) \sin 60^o\\\\.\quad =133\sin 60^o\\\\.\quad =115.2[/tex]
Answer:
[tex]\huge \boxed{\mathrm{115.2 \ units^2 }}[/tex]
Step-by-step explanation:
We can solve for the area of the triangle when two sides are given and the angle in between the two sides.
[tex]\displaystyle A=\mathrm{\frac{1}{2}ac \cdot sinB }[/tex]
[tex]\displaystyle A=\mathrm{\frac{1}{2} \cdot 19 \cdot 14 \cdot sin60 }[/tex]
[tex]\displaystyle A=\mathrm{\frac{133\sqrt{3} }{2} }[/tex]
[tex]\displaystyle A=\mathrm{115.18137870...}[/tex]
The area of the triangle is 115.2 units².
solve
2 + 2y + z=4
3x-4y- 2z=2
5x+3y+5z=-1
Step-by-step explanation:
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The accompanying data are the shoe sizes and heights (in inches) of 14 men. Find the equation of the regression line. Then construct a scatter plot of the data and draw the regression line. Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. If the x-value is not meaningful to predict the value of y, explain why not.
(a) x= 11.5
(b) x= 8.0
(c) x = 15.5
(d) x = 10.0
Complete question :
Data of shoe sizes :
X:
8.5
9.0
9.0
9.5
10.0
10.0
10.5
10.5
11.0
11.0
11.0
12.0
12.0
12.5
Height (y) :
66.5
68.5
67.5
70.0
70.0
72.0
71.5
70.0
71.0
71.5
73.0
73.5
74.0
74.0
Answer:
Kindly check explanation
Step-by-step explanation:
Using the online regression calculator :
The regression model obtained in the form:
ŷ = mx + c is ;
ŷ = 1.792X + 52.176
Where ŷ is the predicted or dependent variable
m = 1.792 is the gradient or slope of the regression line
x = the independent variable
c = 52.176 = intercept, where the line of best fit intersects the y axis.
Given the following x values, predict ŷ
(a) x= 11.5
ŷ = 1.792(11.5) + 52.176 = 72.784
(b) x= 8.0
ŷ = 1.792(8.0) + 52.176 = 72.784 = 66.512
(c) x = 15.5
ŷ = 1.792(15.5) + 52.176 = 79.952
(d) x = 10.0
ŷ = 1.792(10.0) + 52.176 = 70.096
The predicted values are meaningful as they show are very close to the actual values of height (y). This could be attributed to the high correlation Coefficient of 0.9299 which exists between both variables
Find the radius and the center of the circle with the given equation x2+y2−6x−8y−30=0.
Answer:
Center is (3,4)
Radius is √55 which is approximately 7.42
Step-by-step explanation:
First, recall the equation for a circle. The equation for a circle is given by:
[tex](x-h)^2+(y-k)^2=r^2[/tex]
Where (h,k) is the center and r is the radius.
We have the equation:
[tex]x^2+y^2-6x-8y-30=0[/tex]
Thus, we want to turn this into the circle equation.
To do so, we need to complete the square.
First, put all the x-terms together and all the y-terms together. Also, add 30 to both sides:
[tex](x^2-6x)+(y^2-8y)-30=0\\(x^2-6x)+(y^2-8y)=30[/tex]
Now, complete the square for both of the variables. Recall how to complete the square. If we have:
[tex]x^2+bx[/tex]
We divide b by 2 and then square it. Then we will have a perfect square trinomial. To keep things balanced, we must also subtract what we added.
Thus, for the first term:
[tex](x^2-6x)\\=(x^2-6x+9)-9\\(x-3)^2-9[/tex]
And for the second term:
[tex](y^2-8y)\\=(y^2-8y+16)-16\\=(y-4)^2-16[/tex]
Replace the two terms:
[tex]((x-3)^2-9)+((y-4)^2-16)=30[/tex]
Simplify. Add -9 and -16:
[tex](x-3)^2+(y-4)^2-25=30[/tex]
Add 25 to both sides:
[tex](x-3)^2+(y-4)^2=55[/tex]
This is now in the form of the circle equation.
Thus, the center is (3,4).
And the radius is √55 which is approximately 7.42
Answer:
to be honest I'm not sure
PLS HELP ASAP NEED ANSWER NOW FOR TIMED WORK!
Answer: A
Step-by-step explanation:
Since we know that T is the midpoint of SU, we know that it bisects SU. Now, we know that it cuts SU in half. With that, we know that ST and TU are equal.
3x=2x+20 [subtract both sides by 2x]
x=20
Now that we know x, we can plug them in to solve for each segment.
ST
3x [plug in x=20]
3(20) [multiply]
60
----------------------------------------------------------------------------------------------------------
TU
2x+20 [plug in x=20]
2(20)+20 [multiply]
40+20 [add]
60
----------------------------------------------------------------------------------------------------------
SU
60+60=120
We know that SU is ST and TU combines, therefore, we add the values of ST and TU.
The function D ( p ) D(p) gives the number of items that will be demanded when the price is p. The production cost, C ( x ) C(x) is the cost of producing x items. To determine the cost of production when the price is $5, you would:
A. Solve C(D(p)) = 7 for p
B. Evaluate D(C(7))
C. Evaluate C(D(7))
D. Solve D(C(x)) = 7 for x
Answer:
[tex]C(D(5))[/tex]
Step-by-step explanation:
Given:
D(p): Items demanded when price is P
C(x): Production cost of x items
Required
Cost of producing when price is $5
First, we need to get the number of items demanded;
To do this, we substitute 5 for P in D(p)
This gives;
[tex]D(5)[/tex]
Next, we determine the production cost;
To do this, we substitute D(5) for x in C(x)
This gives;
[tex]C(D(5))[/tex]
None of the listed options answer the question
Write: (8 X 100,000) + (4 X 1,000) + (6 X 1) in word form
( eight thousand times one hundred thousand ) plus ( four times one thousand) plus ( six times one )
or if you want the answer to that equation (804,006)
eight hundred four thousand and six
Now is triangles what’s the awnser to this please
Answer:
32
Step-by-step explanation:
The perimeter of a figure is the sum of all the sides.
So, add up all the sides which equals the perimeter.
And we are given that the perimeter is 66. Thus:
[tex](4z)+(5z-3)+(z-1)=66[/tex]
Combine like terms:
[tex]10z-4=66[/tex]
Add 4 to both sides:
[tex]10z=70[/tex]
Divide both sides by 10:
[tex]z=7[/tex]
So, z is 7.
And VW is 5z-3. Thus:
[tex]VW=5z-3\\VW=5(7)-3=35-3=32[/tex]
Our answer is 32 :)
Please Help! I'm stuck
Answer:
D) 11/16
Step-by-step explanation:
Here are the possible combinations she could pull out.
1,1 - 1,4 - 1,5 - 1,8 - 4,1 - 4,4 - 4,5 - 4,8 - 5,1 - 5,4 - 5,5 - 5,8 - 8,1 - 8,4 - 8,5 - 8,8
There are 16 possible combinations. 11 would be above 7, so it’s 11/16.
if you are dealt 4 cards from a shuffled deck of 52 cards find the probability that all 4 are hearts
Answer:
Probability of getting 4 hearts = 11/833
Step-by-step explanation:
Find:
Probability of getting 4 hearts
Computation:
Probability of getting 1st heart = 13 / 52
Probability of getting 2nd heart = 12 / 51
Probability of getting 3rd heart = 11 / 50
Probability of getting 4th heart = 10 / 49
Probability of getting 4 hearts = [(13 / 52)(12 / 51)(11 / 50)(10 / 49)]
Probability of getting 4 hearts = 11/833
Help with the below image… Thank you!
Answer: third one
Step-by-step explanation:
Answer:
alternate ext angles are <4 <5
b) The sum of 9 times a larger number and twice a smaller is 6. The difference of 3 times the larger and the smaller is 7. Compute the numbers. (10marks) Remarks: These questions involved several scenarios 1. Assign the variables -2marks 2. Assumptions of the context of the two numbers -2marks 3. Apply linear systems -2marks 4. Compute using the applicable method of system of linear system -2marks 5. Compute both numbers from above-2marks
Answer:
1) let the larger number be x and the smaller is y
2) 9x + 2y = 6
3x - y = 7
3) 9x+2y=6 and 9x -3y = 21
5y = -15
y= -3
5)
3x=4
x=4/3
Which of the following fractions converts to a terminating decimal greater than one?
A. 4/3
B.7/2
C. 1/4
D.13/11
Answer:
B.7/2
Step-by-step explanation:
4/3 = 1.3333...
The number is greater than one, but it is NOT a terminating decimal.
7/2 = 3.5
The number is greater than one and terminating.
1/4 = 0.25
The number is terminating but less than one.
13/11 = 1.181818...
The number is greater than one, but it is NOT a terminating decimal.
Option B is the correct answer.
Hope this helps.
Considering that a fraction is a division, the correct option is:
B.7/2
---------------------------------
To convert the fraction to decimal, we divide the numerator by the denominator.
---------------------------------
Option A:
[tex]\frac{4}{3} = 1.333333....[/tex]
Greater than one, but non-terminating.
---------------------------------
Option B:
[tex]\frac{7}{2} = 3.5[/tex]
Greater than one and terminating, thus this is the correct option.
---------------------------------
Option C:
Denominator greater than the numerator, thus less than one.
---------------------------------
Option D:
[tex]\frac{13}{11} = 1.1818181818....[/tex]
Greater than one, but non-terminating.
A similar problem is given at https://brainly.com/question/17772407
A company makes t-shirts and their research shows that that price and demand are related linearly: p = m x + b . They know that in order to sell 5 shirts they need to set the price at $50, and in order to sell 10 shirts they need to set the price at $40. Find the linear equation relating price to demand.
Answer:
The linear equation relating price to demand is Q=-0.5*P + 30
Step-by-step explanation:
The demand for a good is the quantity of that good that the demanders are willing to purchase at a given price.
Then, the Demand Curve relates the quantity that a consumer would be willing to buy as a function of price.
You seek to determine the linear equation that relates the price to the demand Q = m * P + b where Q is the quantity demanded at a price P, and compared with the equation of the straight line y = mx + b, m is the slope and b is the ordinate to the origin.
On a line of the form y = m * x + b, the value of m, having two points, is calculated by:
[tex]m=\frac{y2-y1}{x2-x1}[/tex]
And the ordinate to the origin b is calculated, taking the value of m, replacing any of the two points (replacing any of the two because it must give the same value of b) in the expression y = m * x + b and solving its value.
In the case of Q=m*P+b, the value of m, having two points, is calculated by:
[tex]m=\frac{Q2-Q1}{P2-P1}[/tex]
Being:
Q1= 5P1= $50Q2= 10P2= $40and replacing:
[tex]m=\frac{10-5}{40-50}[/tex]
you get:
m= -0.5
So, being Q=-0.5*P+b, b is calculated by:
Replacing the point Q1= 5 and P1= 505= -0.5*50 + b → 5= -25 + b → 5+25= b → b= 30
Replacing the point Q1= 10 and P1= 4010= -0.5*40 + b → 10= -20 + b → 10+20= b → b= 30
Then, the linear equation relating price to demand is Q=-0.5*P + 30