Rate Pratap can row in still water is 6.75 and Rate of current is 2.25
Step: 1
Let's y = speed of water and x = his speed of rowing in still water
Speed = Distance/Time (or)
Rate = Distance/Time
Step: 2
he row downstream in 2 hours
Rate in downstream = 18/2
Rate in downstream = 9
i.e.
x + y = 9
x = 9 - y ---(i)
Now, time taken by min to row in upstream = 4 hours
Rate in upstream = Distance/Time = 18/4
Rate in upstream = 4.5
i.e., x-y = 4.5 ---(ii)
Putting the value of x from equation (i) in equation(ii)
9 - y - y = 4.5
9 - 2y = 4.5
9 - 4.5 = 2y
y = 4.5/2
y = 2.25
Putting the value of y in equation (ii)
x - 2.25 = 4.5
x = 4.5 + 2.25
x = 6.75
x = Rate Pratap can row in still water = 6.75
y = Rate of current = 2.25
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4/3 pi (2)^3 + 1/3 (2)(4)
The Student Council is having an election for its executive board, which consists of 3 positions—president, vice president, and secretary. If there are 11 members on the Student Council, how many different possibilities are there for selecting an executive board?
165
1,331
39,916,800
990
The different possibilities available for selecting an executive board in Student Council in election is 990 ways
How to find the number of ways of choosing the three officesIn permutation, order matters hence in choosing or making selection specific order should be followed. an instance here is arranging the 3 letters word from ABC. ₃P₃ = 6
ABCACBBACCABBCACBAThe problem is a permutation problem trying to select 3 from 11 where order matters. The order include choosing the president the ramainig position is left 2 for 10. and so on.
This is shown in permutation as follows
₁₁P₃ = 11! / (11 - 3)!
= 11! / 8!
= 990 ways
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Yuson must complete 30 hours of community service. She does 2 hours each day. Which linear equation represents the hours Yuson has left after x days?
A. y=-2x+30
B. y=2x+30
C. y=-2x-30
D. y=2x-30
The linear equation that represents the hours Yuson has left after x days is (A) y = -2x + 30
Given in question,
Hours she should complete = 30 hours
Hours she complete each day = 2 hours
Hours completed in x days = 2x
Hours left after x days = 30 -2x
Hence, the linear equation that represents the hours Yuson has left after x days is y = -2x + 30.
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The graph of y = f(x) is graphed below. What is the end behavior of f(x)?
Answer:
The third option, as x approaches infinity y approaches infinity and as x approaches negative infinity y approaches negative infinity.
Step-by-step explanation:
the ratio of aspens to panderosa pines in a part of a forest is 10 to 16.if there are 12 panderosas pines, how many Aspens are there?
Answer: 19.2, I think.
Step-by-step explanation: 10*1.2 = 12.
To keep the ratio balanced, you must also do 16*1.2, which is 19.2. Making the ratio 12 : 19.2
Describe the end behavior of each function using the leading coefficient and degree, and state
the domain and range.
1. f(x) = 3x^4
2.f(x) = -2x^3
3.f(x) = -1/2x^5
4.f(x)=3/4x^6
Answer:
1. y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain: (-∞, ∞); Range: [0, ∞)
2. y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain: (-∞, ∞); Range: (-∞, ∞)
3. y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain: (-∞, ∞); Range: (-∞, ∞)
4. y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain: (-∞, ∞); Range: [0, ∞)
Step-by-step explanation:
Rule for end behavior of polynomials:
(a) Positive leading coefficient, even degree: y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞
(b) Negative leading coefficient, even degree: y ⇒ -∞ as x ⇒ ∞ AND y ⇒ -∞ as x ⇒ -∞
(c) Positive leading coefficient, odd degree: y ⇒ ∞ as x ⇒ ∞ AND y ⇒ -∞ as x ⇒ -∞
(d) Negative leading coefficient, odd degree: y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞
Domain and range for a polynomial function with an odd degree will always be all real numbers, whether or not there's a constant or not.
Domain will always be all real numbers for a polynomial function with an even, whether or not there's a constant.
For a polynomial function with an even degree, the range will extend from the y-coordinate of the vertex to ∞, if the leading coefficient is positive
For a polynomial function with an even degree, the range will extend from -∞ to the y-coordinate of the vertex if the leading coefficient is negative.
William opened two investment accounts. The first year, these investments, which totaled $2600, yielded $175 in simple interest. Part of the money was invested at 7.5% and the rest at 5%. How much was invested at each rate?
An amount of $1800 was invested at a rate of 7.5% and $800 was invested at a rate of 5%.
What is the percentage?The percentage is a ratio that can be expressed as a fraction of 100.
Given that, one part of $2600 was invested at a rate of 7.5% and the other part was invested at a rate of 5%, and the total yield was $175 simple interest.
Let $x was invested at 7.5%, then $(2600-x) was invested at 5%.
Since the yield is $175, it follows,
7.5% of x + 5% of (2600-x) = 175
7.5x/100 + 5(2600-x)/100 = 175
7.5x + 13000 - 5x = 17500
2.5x = 17500-13000
2.5x = 4500
x = 1800
Now, the value of (2600-x) is,
2600-1800
=800
Hence, $1800 was invested at a rate of 7.5% and $800 was invested at a rate of 5%.
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William invested $1800 at 7.5% and $800 at 5% on his both accounts.
What is simple interest?We know simple interest (SI) is given by SI = (p×r×t)/100, where
p = principle, r = rate in percentage, and t = time in years.
Given, William opened two investment accounts. In the first year, these investments, which totaled $2600,
Assuming he invested $x at 7.5% on the first account and $(2600 - x) at 5% in the second account and yielded $175 in simple interest.
∴ (x×7.5×1)/100 + {(2600 - x)×5×1}/100 = 175.
7.5x/100 + (13000 - 5x)/100 = 175.
7.5x + 13000 - 5x = 17500.
2.5x = 4500.
x = 1800. And (2600 - x) = (2600 - 1800) = 800.
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what is the same value as 8.76
Answer:
B, C
Step-by-step explanation:
A is incorrect, it should be seventy-six hundredths.
D is incorrect, the place value for the third term is wrong - it should be 0.06.
In ΔQRS, s = 7.9 cm, ∠Q=125° and ∠R=23°. Find the length of q, to the nearest 10th of a centimeter.
The length of q, to the nearest 10th of a centimeter, is 8.8 cm.
We are given the following;
In ΔQRS, s = 7.9 cm, ∠Q=125° and ∠R=23°.
The third angle can be calculated using the angle sum property:
angle Q + angle R + angle S = 180 degrees
125 degrees + 23 degrees + angle S = 180 degrees
angle S = 180 - (125 + 23) degrees
angle S = 180 - 148 degrees
angle S = 32 degrees
To find the length of q we shall apply the Sine rule.
q / Sin Q = s / Sin S
q / Sin 125 = 7.9 / Sin 32
by cross multiplication we will get;
q = (7.9 x Sin 125) / Sin 32
q = (7.9 x 0.61) / 0.55
q = 8.8 cm (approximately)
So, the length of q is 8.8 cm.
Thus, the length of q, to the nearest 10th of a centimeter, is 8.8 cm.
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HFHFHFHHFHFHFHHHVHFHVHVHHVHVHHV
At time t = 0, water begins to drip out of a pipe
nto an empty bucket. After 56 minutes, 8 inches
of water are in the bucket. What linear function
n the form y = mx + b represents the amount of
water in inches, w, in the bucket after t minutes?
Step-by-step explanation:
w = t/7
at the beginning we 0 inches of water.
after 56 minutes we have 8 inches of water.
that is a ratio of 56 minutes / 8 inches = 7/1 = 1 / 1/7.
so, in 1 minute we get 1/7 inch of water.
in 2 minutes 2×1/7 = 2/7.
in 3 minutes 3×1/7 = 3/7.
...
hence the equation.
Answer:
y = t/7Step-by-step explanation:
GivenStart time t = 0,Start level y = 0,Level of y = 8 in after t = 56 minSolutionFind the value of m and b in the equation y = mx + b.
The value of b = 0, since there is no level in the bucket initially.
Find the value of m, the slope:
8 = 56m,m = 8/56m = 1/7So the equation is:
y = (1/7)t + 0or
y = t/7
The wholesale cost of a dining room table at a furniture store is $1,115.80. The
markup for the table is 20%. What is the selling price of the dining room table?
Answer: $1338.96
Step-by-step explanation:
The wholesale cost means the cost that the store buys the table from the supplier. To find the price that the store sells it, it is a 20% markup.
The orginal price is $1,115.80. What is 20% of $1,115.80?
$1,115.80 * .20 = $223.16
Lets add the original price to the markup.
$1,115.80 + $223.16 = $1338.96
Hope this helps <3
Evaluate the equation:
6w = 180
W = ____
Answer:
30
Step-by-step explanation:
Divide each term in 6 w = 180 by 6 and simplify. w = 30
Answer:
w = 30
Step-by-step explanation:
Given equation,
→ 6w = 180
Now the value of w will be,
→ 6w = 180
→ w = 180/6
→ [ w = 30 ]
Hence, the value of w is 30.
Determine whether the series converges or diverges...
Answer:
Convergence
Step-by-step explanation:
Use the Squeeze Theorem,
I know that
[tex] \frac{k \sin {}^{2} (k) }{1 + k {}^{3} } [/tex]
lies between 0 and 1 so
[tex]0 \leqslant \frac{k \sin {}^{2} (k) }{1 + {k}^{3} } \leqslant \frac{k}{1 + k {}^{3} } [/tex]
The final series behaves like
[tex] \frac{1}{k {}^{2} } [/tex]
Using the p series, since p is 2, the series
[tex] \frac{k}{1 + k {}^{3} } \: converges[/tex]
Since the 0 and k/1+k^3 converges, the series converge.
Convergence
the commission paid on goods for $4000 is $80. what is the percentage commission?
Answer:
percentage = 80÷4000=0.02
a dish contains 2 yellow triangles, 3 yellow squares, and 1 green square two shapes are drawn in a sequence with replacement. what is the probability of drawing a green triangle on a second draw given the first draw was a yellow shape?
Answer: I don't know
Step-by-step explanation:
I have no idea
How do i solve this equation -3 ≥ 1/2 + 11
Answer:
-3≥11.5
Step-by-step explanation:
-3≥1/2+11
-3≥11.5
According to a study done by UCB students, the height for Martian adult males is normally distributed with an average of 65 inches and a standard deviation of 2.4 inches. Suppose one Martian adult male is randomly chosen. Let X = height of the individual. Round all answers to 4 decimal places where possible.
The probability that the person is between 67.1 and 68.3 inches, using the normal distribution, is of:
0.1056 = 10.56%.
Normal Probability DistributionThe z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.Using the z-score table, the p-value associated with the calculated z-score is found, and it represents the percentile of the measure X in the distribution.The mean and the standard deviation for the heights of UCB students are given as follows:
[tex]\mu = 65, \sigma = 2.4[/tex]
The probability that the person is between 67.1 and 68.3 inches is the p-value of Z when X = 68.3 subtracted by the p-value of Z when X = 67.1, hence:
X = 68.3:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (68.3 - 65)/2.4
Z = 1.38.
Z = 1.38 has a p-value of 0.9162.
X = 67.1:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (67.1 - 65)/2.4
Z = 0.88.
Z = 0.88 has a p-value of 0.8106.
0.9162 - 0.8106 = 0.1056 = 10.56%.
Missing informationThe problem asks for the probability that the person is between 67.1 and 68.3 inches.
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Brand A has a box of 25 forks for 1.99 and Brand B has a box of 42 totals for 3.89. What is the unit price for each brand and what brand is a better buy based on unit price
Answer:
Brand A
Step-by-step explanation:
Brand A has a box of 25 forks for 1.99
Take the price per fork
1.99 /25 = .0796
.08 per fork
Brand B has a box of 42 totals for 3.89
3.89 / 42
.092319048
.09 per fork
Jimmy is writing a paper for one of his classes. The paper has to be 3,000 words long, and so far he has written 786 words. If he only has 6 more days to write his paper and wants to write the same number of words each day, then how many words must he write per day to finish the paper?
Jimmy has to write 369 words per day for the next 6 days to finish the paper.
The total number of words in the paper has to be 3000
Jimmy has already written = 786 words.
3000-786 = 2214
So, Jimmy still has to write 2214 words.
He has 6 days to write the paper and he wants to write the same number of words per day.
With this in mind to find out how many words he has to write per day we can divide 2214 by 6.
2214/6 = 369 words
So, Jimmy has to write 369 words per day for the next 6 days to finish the paper.
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What is 79 - 75 / 75 * 100 ?
I'm dividing 75 into 79 - 75 then timesing that by 100, I keep getting -21 but that's not right. I need help please
The required value of the given expression : [tex]\frac{79 - 75 }{ 75 }[/tex] × 100 = 5.3
What is BODMAS rule ?The Bodmas rule is based on the BODMAS acronym, which stands for Brackets, Order of Powers or Roots, Division, and Multiplication. Subtraction is represented by the letter S, while addition is represented by the letters A and S. According to the BODMAS rule, mathematical expressions with multiple operators must be resolved in the order of BODMAS, starting from the left. As with addition and subtraction, division and multiplication are interchangeable and depend on which comes first in the expression.
Given : [tex]\frac{79 - 75 }{ 75 }[/tex] × 100
on calculating it further
we get :
[tex]\frac{4}{75}[/tex] × 100
0.0533 X 100
=> 5.3
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I don’t know who it is please helppp
Triangle C forms a right angle triangle.
Given:
Triangle A : 8 cm , 13 cm , 5 cm
Triangle B : 14 cm , 30 cm , 17 cm
Triangle C : 26 cm , 10 cm , 24 cm
To form a right angled triangle the longest side square is equal to the sum of squares of other sides.
In triangle A :
[tex]13^{2} = 8^{2} +5^{2}[/tex]
169 = 64 + 25
169 ≠ 89.
This is not a right angle triangle.
In triangle B:
[tex]30^{2} =17^{2} +14^{2}[/tex]
900 = 289 + 196
900 ≠ 485
This is not a right angle triangle.
In triangle C:
[tex]26^{2} = 10^{2} +24^{2}[/tex]
676 = 100 + 576
676 = 676
so it is a right angle triangle.
Therefore Triangle C forms a right angle triangle.
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Find the measure of the exterior angle.
The measure of the exterior angle is 139 degrees.
What is the measure of the exterior angle?The sum of the interior angle of a triangle is 180 degree.
The sum of angles on a straight line is 180 degrees.
From the diagram;
Angle 1 = 64 degreesAngle 2 = 75 degreesAngle 3 = ?First, we determine the third interior angle of the triangle.
Angle 1 + Angle 2 + Angle 3 = 180
64 + 75 + Angle 3 = 180
139 + Angle 3 = 180
Angle 3 = 180 - 139
Angle 3 = 41 degrees
Now, angle 3 and the exterior angle forms a angle on a straight line.
Hence;
Angle 3 + Exterior angle = 180
41 + Exterior angle = 180
Exterior angle = 180 - 41
Exterior angle = 139 degrees.
Therefore, 139 degrees is the exterior angle.
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In 1/6 of a day Bart read 4/7 of comic book .what rate can he read in a day
The rate at which Bart read is 24/7 book/day.
Given, Bart read 4/7 of comic book in 1/6 of a day.
We have to find the rate at which he read the book in a day.
Now, Bart read 4/7th of a comic book = 1/6th of a day
4/7 comic book = 1/6 day
1 day = (4 × 6)/7 comic book
1 day = 24/7 comic book
So, the rate at which Bart read is 24/7 book/day.
Hence, the rate at which Bart read is 24/7 book/day.
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X= Y. Y = 3. Which statement below is true?
Answer:
X=3
Step-by-step explanation:
I'm not sure what statements below you want me to confirm that X=Y, Y=3
Which of the following are characteristics of the graph of the linear parent
function?
Check all that apply.
A. It goes through the origin.
B. It has a slope of 1.
C. It is a parabola.
D. It is a straight line.
The following are the characteristics of the graph of the linear parent function:
B. It has a slope of 1.
C. It is a parabola.
D. It is a straight line.
Lets explain the meaning of linear parent function
- A linear parent function is the equation y = x or f(x) = x
- A parent function is the simplest equation of a function
- It represented by a straight line passing through the origin point O
- The x-coordinate and the y-coordinate of any points lie on it are equal
- The slope of the line is 1 because the slope is the change of Δy/Δx
and Δy = Δx
The characteristics of the graph of the linear parent function are
∵ Linear parent function is f(x) = x and f(x) = y
∴ x = y
∵ The slope = Δy/Δx
∵ Δx = Δy because x = y
∴ The slope of it is 1
B. It has a slope of 1
∵ y = 0
∵ If x = 0 then y must = 0
∴ It goes through the origin
C. It goes through the origin
∵ It is a linear function
∵ All linear function represented by a straight line
∴ The graph of the linear parent function is a straight line
D. It is a straight line
Hence we get the right answers.
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Let P be the set of integers that are multiples of 3 between 1 and 10 and Q be the set of positive integers that are multiples of 4 and are less than 15. Which of the following list of elements does not belong to the union of P and Q?
A. 5
B. 3
C. 6
D. 4
The union of the sets P and Q does not have the integer 5 since it is neither a multiple of 3 or a multiple of 4.
P is the set of integers between 1 and 10 and multiple of 3.
∴P = {3,6,9}
Q is the set of positive integers less than 15 and multiple of 4.
∴Q = {4,8,12}
Now the union of the sets P and Q is given by :
P∪Q = {3,4,6,8,9,12}
Now the union of the sets does not contain the integer 5.
Any collection of items, including a set of raw materials, the seven days of the week, several car types, etc., can be categorized as a set.
Any set component counts as an element of the set. Curly brackets are used to write a set. A very basic set would resemble something like this:
Q = {4,8,12}.
Therefore the integer 5 does not belong to the union of P and Q .
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Select the postulate that is illustrated for the real numbers. 3 + 2 = 2 + 3
Answer: Symmetry Property of Equality
guys please help!! tyyy
Valentina is trying to decide wether to join her schools swim team. During the summer the team practices 4 days per week. Each of those days, they practice for 3 hours in the morning and practice again in the afternoon. They practice for a total of 20 hours each week
The equation that can be used to find the length of the afternoon practice is B. 4(h + 3) = 20
What is an equation?An equation is the statement that illustrates that the variables given. In this case, two or more components are taken into consideration to describe the scenario.
In this case, during the summer the team practices 4 days per week and each of those days, they practice for 3 hours in the morning and practice again in the afternoon.
Let the afternoon practice be h.
Therefore, the equation will be:
4(h + 3) = 20
In conclusion, the correct option is B.
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