Answer:
15125265
Step-by-step explanation:
17. It takes one minute to fill (3/7) th of a vessel. What is the time taken in
minutes to fill the whole of the vessel?
Answer:
Given that 1minute =3/7of the vessel
let the time taken in minutes to fill the whole of the vessel be' x' minute.
1min =3/7
xmin =whole vessel =1=7/7
=3x/7=1=x=7/3=2.3min=2min.3sec
Given the following function, find h(4).
h(t) = t - t + 3
h(4) =
If [tex]h(t)=3[/tex] then [tex]h(4)=3[/tex]
2x-3(x-1)=-1 solve by substitution
Answer:
-x+3
Step-by-step explanation:
Distribute -3:
2x-3x+3
Collect like terms:
-x+3
Of all ladies over the age of 50, 72% report that they color their hair to hide their gray. What is the probability
that under 70% color their hair in a group of 85 older women?
Answer:
0.3409 = 34.09% probability that under 70% color their hair in a group of 85 older women.
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the Central Limit Theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex].
72% report that they color their hair to hide their gray.
This means that [tex]\mu = p = 0.72[/tex]
What is the probability that under 70% color their hair in a group of 85 older women?
For a sample of 85, we have that [tex]s = \sqrt{\frac{0.72*0.28}{85}} = 0.0487[/tex]
This probability is the pvalue of Z when X = 0.7. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{0.7 - 0.72}{0.0487}[/tex]
[tex]Z = -0.41[/tex]
[tex]Z = -0.41[/tex] has a pvalue of 0.3409
0.3409 = 34.09% probability that under 70% color their hair in a group of 85 older women.
Create a system of equations
Janet is 5 years older than her brother David. The sum of their ages is 27. How old are Janet and David
Answer with steps please
Answer:
Answer: Janet is 16, and David is 11.
Step-by-step explanation:
Let the ages be j and d.
j = d + 5
j + d = 27
Substitute d + 5 for j in the second equation.
d + 5 + d = 27
2d + 5 = 27
2d = 22
d = 11
Substitute 11 for d in the first equation.
j = d + 5
j = 11 + 5
j = 16
Answer: Janet is 16, and David is 11.
130° 20 C = degrees.
Answer:
hold on im trying to solve it
Step-by-step explanation:
Answer:
65
Step-by-step explanation:
2(65) = 130
180-130 = 65
hope this helps plz mark brainliest!
For what value of x do the expressions 2x +3 and 3x -6 have the same value?
Answer:
9
Step-by-step explanation:
2x+3=3x-6
3+6=3x-2x
9=x
Answer:
x= 9
Step-by-step explanation:
hello :
2x +3 = 3x -6
2x-3x=-6-3
-x= -9
so : x= 9
What is the volume of this cylinder? Use 3.14 and round your answer to the nearest hundredth. the diameter is 16 cm and the height is 20 cm
Find the area of the base [tex]A=64\pi[/tex].
Multiply area of the base by height to get volume
[tex]V=20\cdot64\pi=4021.24[/tex]
Hope this helps.
pls help im confused im not smart
Assume that in the year 2019, 843,000 people attended the Christmas Eve celebration at Walt Disney World
In 2020, attendance for the Christmas Eve celebration is expected to increase by 35%. What is the total
number of people expected at Walt Disney World for this event?
Total number of people
Expected at Walt Disney world for this event
Answer:
1138050
Step-by-step explanation:
Multiply 843,000 by 0.35 and then add the numbers together.
Please mark brainliest
Solve for x. (TYPE ONLY THE NUMBER FOR YOUR ANSWER).
9514 1404 393
Answer:
x = 7
Step-by-step explanation:
The sum of angle measures in a quadrilateral is 360°.
(8x-5)° +107° +83° +119° = 360°
8x = 56 . . . . . . . divide by °, subtract 304
x = 7 . . . . . . . . . . divide by 8
I will give you Brianlyist
Answer:
what do you need help with?
Step-by-step explanation:
**you will get a real answer i promise**:)
Answer:
I don't understand the problem
What is the solution to this system of equations? 4x+y=6 x-2y=6
Answer:
it's A!!!
Step-by-step explanation:
hoped I helped
Answer:
The anwser is A.
Step-by-step explanation:
4x+y=6 and x-2y=6 so the answer is 2, and -2
1
2
b= 2 in.; c= 6 in.
A= sq. in.
Please help mark brainliest and big points
Answer:
I believe the answer is 5.657 square inches.
Step-by-step explanation:
Find the missing angle measure.
Answer:
x=98
Step-by-step explanation:
all interior angles in a hexagon equals 720, just subtract 720 by every known angle and you are left with the unknown angle
What is 4 x 1 1/2 x 2
Answer:
Step-by-step explanation:
4×1½×2 = 4×3 = 12
Please Helppplpppppp
OK SOMEONE PEASE AWSNWER THISD
Martha drew a triangle with angle measures 60°, 60°, and 60°, and side lengths 6 cm, 6 cm, and 6 cm. What kind of triangle did Martha draw?
A. acute, equilateral
B. acute, scalene
C. right, isosceles
D. obtuse, scalene
Answer:
A
Step-by-step explanation:
hryhrhdvshzhsbdyxhdbdhxhbd
Answer:
A
Step-by-step explanation:
i dunno but its right! stay safe stay healthy <3
8.
Tom works 1 3/4 hours a day at a café. He is paid $8 an hour. How much
money is he paid in 10 days?
Answer:
1 3/4 x 8 = 14. In 10 days, he will be paid the amount of one day x 10. 14 x 10 = 140. Tom will be paid $140 in 10 days
Step-by-step explanation:
The domain of f(x)=cosx
must be restricted to all real numbers in order for the function to have an inverse function. The domain of g(x)=arccos(x)
is −1≤x≤1
and its range is 0≤x≤π
.
is this correct ?
Answer:
Not completely sure for the rest, but I believe the range is incorrect: the range represents y-values, not x-values.
So it should be 0 ≤ y ≤ π
evaluate the expression 8 ÷ t when t= 4
Calculate the percent: 9% of 124
Answer:
9% of 124 is 11.16
Math Question for 50 points please help
Answer:
BStep-by-step explanation:
Your answer is B.
⚠︎ I HOPE YOU ARE DOING WELL ☻︎
HAVE A FANTASTIC DAY ꨄ︎
Answer:
The answer is B
Step-by-step explanation:
Its different from all the others
A community center offers yoga classes for $8 per month plus an additional $0.25 per center floor mat used.Write an equation to express this relationship, using m to represent the number of mats used per month and C to represent the total cost in dollars.
(8*P) + (0.25*m)=C
P = People
Answer:
Step-by-step explanation:
A community center offers yoga classes for $8 per month plus an additional $0.25 per center floor mat used.Write an equation to express this relationship, using m to represent the number of mats used per month and C to represent the total cost in dollars.
If each person gets a 1/2 gallon of water, then how many people can share 64 gallons of water?
Answer: 128 people
Step-by-step explanation:
every 2 people get a gallon so 2*64=128
What value makes x + 4 and 5x equivalent?
Answer:
1..............................
The prices of houses in the US are strongly skewed to the right with a mean of $383,500 and a standard deviation of $289,321. A real estate agent takes a random sample of 10 houses and records the mean price. What is the shape of the distribution of the sample mean for all possible random samples of size 10 from this population?
Answer:
strongly skewed right
Step-by-step explanation:
since the sample size is under 30, it will remain skewed right.
The shape of the distribution of the sample mean for all possible random samples of size 10 from this population is strongly skewed right.
What is sampling?It should be noted that sampling simply means the selection process from a particular population.
In this case, the shape of the distribution of the sample mean for all possible random samples of size 10 from this population is strongly skewed right. This is because the sample size is under 30.
Learn more about sampling on:
https://brainly.com/question/24466382
Amanda went to the store to purchase ink pens. She found three kinds of pens. The first cost $4 each; the price of the second kind was 4 for $1; and the cost for the third kind was 2 for $1. She bought 20 pens and she bought at least one of each kind. (It is possible to buy only 1 of the pens that are "4 for $1" or "2 for $1".) The cost was $20. When she got back to her office, Amanda decided to turn this into a math problem for me. She asked: how many of each kind did I buy?
Answer:
Amanda buy first kind of pen = 3
Amanda buy second kind of pen = 2
Amanda buy third kind of pen = 15
Step-by-step explanation:
Given - Amanda went to the store to purchase ink pens. She found three
kinds of pens. The first cost $4 each; the price of the second kind
was 4 for $1; and the cost for the third kind was 2 for $1. She bought
20 pens and she bought at least one of each kind. (It is possible to
buy only 1 of the pens that are "4 for $1" or "2 for $1".) The cost was
$20.
To find - When she got back to her office, Amanda decided to turn this into
a math problem for me. She asked: how many of each kind did I
buy?
Proof -
Let Amanda buy first kind of pen = x
second kind of pen = y
third kind of pen = z
As given,
She bought total pen = 20
⇒x + y + z = 20 ...............(1)
Now,
As given,
cost for first kind pen = $4 for 1 pen
As she bought x pens of first kind , so
Cost of x pens of first kind = $4x
Now,
The price of the second kind was 4 for $1
⇒Cost of second kind = $[tex]\frac{1}{4}[/tex] for 1 pen
As she bought y pens of send kind , so
Cost of y pens of second kind = $[tex]\frac{1}{4}y[/tex]
Now,
The price of the third kind was 2 for $1
⇒Cost of third kind = $[tex]\frac{1}{2}[/tex] for 1 pen
As she bought z pens of send kind , so
Cost of z pens of third kind = $[tex]\frac{1}{2}z[/tex]
Now,
As given, The cost was $20
⇒4x + [tex]\frac{1}{4}y[/tex] + [tex]\frac{1}{2}z[/tex] = 20
⇒16x + y + 2z = 80 .....................(2)
∴ we get 2 equations
x + y + z = 20 .....................(1)
16x + y + 2z = 80 .....................(2)
Now,
Subtract equation (1) from equation (2) , we get
16x + y + 2z - ( x+ y + z )= 80 - 20
⇒16x + y + 2z - x - y - z = 60
⇒15x + z = 60
⇒z = 60 - 15x
Now,
Put the value of z in equation (1) , we get
x + y + 60 - 15 x = 20
⇒ y - 14x = 20 - 60
⇒y - 14x = -40
⇒14x - y = 40
⇒y = 14x - 40
Now,
we get
z = 60 - 15x
y = 14x - 40
As given
she bought at least one of each kind
it means x > 1, y > 1, z > 1
Now,
If x = 1, then y = 14 - 40 = -26
Not possible
If x = 2 , then y = 14(2) - 40 = -12
Not possible
If x = 3, then y = 14(3) - 40 = 2 and z = 60 - 15(3) = 15
Possible.
If x = 4, then y = 14(4) - 40 = 16 and z = 60 - 15(4) = 0
Not Possible.
If x = 5, then y = 14(5) - 40 = 30 and z = 60 - 15(5) = -15
Not Possible.
∴ we get
x = 3, y = 2, z = 15
Amanda buy first kind of pen = x = 3
Amanda buy second kind of pen = y = 2
Amanda buy third kind of pen = z = 15
Can someone please help me with this problem?
9514 1404 393
Answer:
0, 1, 2, 3
Step-by-step explanation:
The set of absolute values of integers is the set of non-negative integers. The four smallest values of the set are ...
0, 1, 2, 3
find 2 solutions to -x>10
Answer and Step-by-step explanation:
x < -10
All real numbers that are less than -10.
(-∞, -10)
#teamtrees #WAP (Water And Plant)
