Answer: 14 mph
Step-by-step explanation:
Let x = the speed of the boat in still water.
Then the speed of the boat relative the bank of the river is u-5 km/hb when it moves upstream, and u+5 when it moves downstream.
We can write the basic equation for travel and distance problems
Time = Distance/Speed in the form
t = 9/x-5 for moving upstream, and
t = 19/x+5 for moving downstream.
Since the left side, t, is the same in both equations, you get a single equation for u
9/x-5 = 19/x+5
To solve it, multiply both sides by the product (x-5)*(x+5) and simplify:
9*(x+5) = 19*(x-5),
9x + 45 = 19x - 95,
45 + 95 = 19x - 9x,
10x = 140,
u = 140/10 = 14 mph.
hope this helps
how many elements are in the set AnB
Answer:
option A - 2
Step-by-step explanation:
event A { 2 4 6 8 10 12 }
event B { 3 6 9 12 }
The set AnB means A intercept B, which simply means all the elements that are common in event A and event B
So we just have to look at all the elements in A and B, we can see that the common elements are 6 and 12 so therefore:
set AnB = { 6 12 }
and the number of elements in set AnB is 2
Given: (GH) is a midsegment of ∆DEF.
Find the value of x and y.
What is the length of (DF) ?
Answer:
leg lengths are 5 units and 3 units.
Step-by-step explanation:
ヾ(•ω•`)o
d²y/dx²-3(dy/dx) - 4y = 0
The Solution of the equation y = C₁e⁴ˣ + C₂e⁻ˣ
Derivatives:The derivative of a function is a function that indicates how quickly another function is changing. Differentiation is a term used to describe the process of finding a derivative. In an equation, it is shown as the dependent variable with respect to the independent variable. A value's derivative is a change in value relative to its input. The symbol for a derivative is f'(x).
Here we have
d²y/dx²-3(dy/dx) - 4y = 0
As we know (d/dx) = D
=> D²-3D - 4 = 0
=> D²- 4D + D - 4 = 0
=> D(D - 4) + (D - 4) = 0
=> (D - 4) (D + 1) = 0
=> (D - 4) = 0 and (D + 1) = 0
=> D = 4 and D = -1
Here, roots are real and distinct
Therefore,
Solution of the equation y = C₁e⁴ˣ + C₂e⁻ˣ
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3 of 30 computers are out of seevice what percentage is working
Answer:
10%
Step-by-step explanation:
3/30
1/10
10/100
10%
Hopes this helps please mark brainliest
11,12,13,14 10th term
The value of the 10th term for the sequence 11,12,13,14 is 20.
How to find the term?It's important to note that this is an arithmetic sequence. The formula for an arithmetic sequence is:
= a + (n - 1)d
where a = first term = 11
d = common difference = 1
n = number of terms = 10
The 10th term will be:
= a + (n - 1)d
= 11 + (10 - 1)1
= 11 + (9 × 1)
= 11 + 9
= 20
The value is 20.
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Complete question
The first four terms of an arithmetic sequence are 11,12,13,14. Find the 10th term.
A right triangle has a hypotenuse of length 4 inches. If one angle is 41°, find the length of each leg.
The perpendicular of the right triangle is 2.62441 inches and the base of the triangle is 3.0164 inches.
According to the question,
We have the following information:
A right triangle has a hypotenuse of length 4 inches. And one angle is 41°.
Now, we will use trigonometric functions of Sin and Cos to find the length of each leg of this triangle.
Sin 41 = Perpendicular/hypotenuse
Perpendicular = 0.6561*4
Perpendicular = 2.62441 inches
Cos 41 = base/hypotenuse
Base = 0.7541*4
Base = 3.0164 inches
Hence, the perpendicular of the right triangle is 2.62441 inches and the base of the triangle is 3.0164 inches.
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(a × 10^b) x (3.1 × 10^9) = 1.953 x 10^5
Given that a × 10^b is in standard form, work out the values of a and b.
The values of a = 6.3 and b = -5
Scientific notation:
Presenting extremely big or extremely small numbers in a simpler format is done through the use of scientific notation. The full numbers can, as we all know, go on forever, but we are unable to write such enormous quantities on paper. In addition, there was a need for a simpler way to express numbers that appear in the million's place.
Here we have
(a × 10ᵇ) x (3.1 × 10⁹) = 1.953 x 10⁵
=> [tex](a\times 10^{b} ) = \frac{1.953 \times10^{5} }{ (3.1\times 10^{9} )}[/tex]
=> (a × 10ᵇ) = 0.63 × 10⁵ × 10⁻⁹
=> (a × 10ᵇ) = 0.63 × 10⁻⁴
=> 6.3 × 10⁻⁵
Here 6.3 × 10⁻⁵ is in the form of a × 10ᵇ
=> a = 6.3 and b = -5
Therefore,
The values of a = 6.3 and b = -5
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Suppose that x units of a product cost C dollars to manufacture and earn revenue of R dollars. The value of x at
which the expressions for C and R are equal is the break-even quantity, or the number of units that produce 0
profit. Complete parts (a) and (b) below.
C=84x+1,475; R = 109x
No more than 34 units can be sold.
a) The break-even quantity (in units) is 59 units.
b) If the company is selling no more than 34 units, A. The product should not be produced because it will lead to a loss of $625.
What is the break-even point?The break-even point is the production and sales point at which the total costs equal the total revenue.
At the break-even point, there is no profit or loss.
Total units produced = x
Let the cost of production = C
Let the revenue = R
C = 84x+1,475
R = 109x
At the break-even point, 109x = 84x + 1,475
109x - 84x = 1,475
25x = 1,475
x = 59 units
If x = 34 units:
Total cost = 84x+1,475
= 84(34) + 1,475
= 2,856 + 1,475
= $4,331
Total revenue = 109x
= 109(34)
= $3,706
Loss = $625 ($3,706 - $4,331)
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Question Completion:(a) Find the break-even quantity units (Simplify your answer.)
(b) Decide whether the product should be produced on the basis of whether it will earn a profit. (Profit = Revenue - Cost.)
Choose the correct answer below and, if necessary, in the answer box to complete your choice.
A. The product should not be produced because it will lead to a loss of B. The product should be produced because it will lead to a profit of
Someone help please???????
$841,500 is the maturity value.
Given in question,
MV = P(1+RT)
P = $750,000
R = 13.35%
= 13.35/100
= 0.1335
T= 11 months
= 11/12 years
= 0.917 years
Putting the value in equation,
MV = 750000(1+0.1335*0.917)
= 750000(1+0.122)
= 750000*1.122
= 814500
Hence, Maturity Value is $814,500.
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NEED to know today PLSS.
Game Station 4: Spinner of 4 equal parts: Red, Purple, Green and Orange - Rules: If the arrow lands in the red quadrant, "Team Y" gets 7 points. If it lands in the other quadrants, both teams lose 1 point
A. "Team Y" spins 5 times. How many of the possible outcomes could have landed in Red exactly 3 times and on purple exactly 2 times?
B. "Team Z" spins 4 times. How many of the possible outcomes could have landed in Red
C. "Team Y" spins 5 times. How many of the possible outcomes could have landed in Red at least once?
use combinations, not probability.
The results of the combinations are given as follows:
A. Number of possible outcomes with red exactly 3 times and Purple exactly 2: 10.
B. Number of possible outcomes with red at least ounce in 4 spins: 175.
C. Number of possible outcomes with red at least ounce in 5 spins: 781.
How to obtain the number of outcomes?The outcomes are obtained in two ways, as follows:
Combination -> Item a, as it is an arrangement with repetition, which is equivalent to combination.Fundamental Counting Theorem -> Items b and c.CombinationThe combination formula calculates the number of different combinations of x objects from a set of n elements, according to the equation presented as follows:
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
From item a, there are 5 outcomes with 3 and 2 repetitions, hence the number of results is obtained as follows:
[tex]C_{5,3} = \frac{5!}{3!2!} = 10[/tex]
Fundamental Counting TheoremIt states that the number of outcomes of n independent trials is given by the multiplication of the number of outcomes for each trial.
For item b, we have that:
There are 4 spins.Each with 4 outcomes.Hence the total number of outcomes, without considering the restriction is:
Total = 4^4 = 256.
With no red results, the number of outcomes is:
Total no red = 3^4 = 81.
Hence the number of outcomes with at least one red result, considering complementary events, is:
256 - 81 = 175.
Item c follows the same logic, only with 5 trials instead of four, hence:
4^5 - 3^5 = 781.
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A drilling crew dug to a height of 232 feet during their first day of drilling. On the second
day, the crew dug down 193 feet more than on the first day. Describe the height of the
bottom of the hole after the second day.
Answer using a mixed number and label your
answer.
The depth of the bottom of the hole after the second day is 425 feet using addition operation.
What is addition?
In math, addition is the process of adding two or more integers together. The terms addends and sum describe the input and output of the addition operation, respectively.
Given the depth on the first day is 232 feet.
Depth on the second day = 193 feet more than on the first day i.e. 193 feet + depth on the first day
This implies, depth on the second day = 193+232
= 425 feet
The hole's bottom will therefore be 425 feet deep after the second day.
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It was observed over the past year that it rained on 105 of 365 days. What was the probability of any day being rainy last year?
Express your answer as a simplified fraction.
The probability of any day being rainy last year is 21/73 .
In the question ,
it is given that ,
In past year ,
the number of days it rained in last past year = 105 days
total number of days in past year = 365 days .
So , the probability of any day being rainy last year is = (number of days it rained )/(total number of days ) .
Substituting the values , we get
probability of any day being rainy last year = 105/365
Simplifying further , we get
= 21/73
Therefore , The probability of any day being rainy last year is 21/73 .
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493÷16
And I need to show my work
Answer: 493/16
Step-by-step explanation:
Find the GCD (or HCF) of numerator and denominator
GCD of 493 and 16 is 1
Divide both the numerator and denominator by the GCD
493 ÷ 1
16 ÷ 1
Reduced fraction:
493
16
Therefore, 493/16 simplified to lowest terms is 493/16. or 30.8125
The population of California was about 37 million in 2010 and increasing by 1.0% each year. Create a formula to estimate the population of California in 2020.
The formula that can be used to estimate the population of California in 2020 is P = Poe^rt.
What is population growth?Population growth has to do with how the number of people in a place is increasing in a given time. We know that the population growth is a positive exponential function.
Initial population (Po) = 37 million
Population growth rate (r) = 1.0%
Time interval (t) = 10 years
Now using the formula;
P = Poe^rt
P = 37 * 10^6 e^0.01 * 10
P = 41 million
There would be about 41 million people within the next ten years.
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liu earned $316 on an investment of $869. How much would $1298 have earned in the same investment?
Liu will earn $472 on an investment of $1298.
Given, Liu earned $316 on an investment of $869.
We have to find how much he would earned if he invest $1298 in the same investment.
Now, $869 investment = $316 earned
$1 investment = 316/869 earned
$1298 investment = 316/869 × 1298 earned
$1298 investment = $472 earned
Hence, Liu will earn $472 on an investment of $1298.
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One equation for calculating the volume of a cylinder is V = B , where B represents the area of the base of the cylinder. Which expression can be used to find the value of B, in square centimeters, for this cylinder?
The numbers are 12.1 and 3.8
The base of a cylinder is circular and it's area is given as B= πr^2
What is a cylinder?A cylinder is a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface. The center of the circular bases overlaps each other to form a right cylinder.
The base of a cylinder is circular . If the base area is B, then the area of the base is πr^2.
where r is the radius of the circle and π is 22/7
The volume of a cylinder is V = B × h
where B is the base area and h is the height or length of the cylinder.
Therefore the volume of a cylinder is V= πr^2h
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This is math PLS HELP SOME PPL DO HELP BUT PLS
The unit rate of discovery of the new species of marine animals are; 2000 per year.
What is unit rate?There is independent quantity, and a quantity which depends on it (dependent quantity). When independent quantity moves by a unit measurement (single unit increment), the increment in dependent quantity is called rate of increment of dependent quantity per unit increment in independent quantity.
We have been given about 4000 new species of marine animals were discovered in the last 2 years.
We need to find the unit rate of discovery.
Total = 4000 new species
Time = 2 year.
Unit rate = new species of marine animals/ time period
Unit rate = 4000/ 2
Unit rate = 2000/1
Therefore, the unit rate of discovery of the new species of marine animals are; 2000 per year.
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Write the point-slope (y - k = m(x - h)) form of the equation from
the information given.
1. Slope =ï½; (h, k) = (1, -2) I
2. Slope equals 2 and the line goes through the point (-1, 3)
3. The line goes through the points (8,5) and (9, 6)
4. The line goes through the points (-1, -7) and (-8, -2)
5. The line goes through the points (1/2, 3/2) and (-1/4, 5/4)
The point-slope forms of the equation from the information given is 1. y + 2 = ï½(x-1), 2.y - 3 = 2(x+1) , 3.y - 5 = 1(x-8), 4. y + 7 = -5/7(x+1) and 5.y - 3/2 = -1(x-1/2).
1.
slope m = ï½ and (h, k) = (1, -2)
The point slope is y + 2 = ï½(x-1)
2.
slope = 2 , point (-1, 3)
y - 3 = 2(x+1)
3.
The line goes through the points (8,5) and (9, 6).
slope m = 6-5 / 9-8
= 1/1
= 1
y - 5 = 1(x-8)
4.
The line goes through the points (-1, -7) and (-8, -2)
slope m = -2+7 / -8+1
= 5/-7
= -5/7
y + 7 = -5/7(x+1)
5.
The line goes through the points (1/2, 3/2) and (-1/4, 5/4)
slope m = 5/4 - 3/2 / -1/4 - 1/2
= 5 - 6 / 4 / -1 + 2 / 4
= -1/1
= -1
y - 3/2 = -1(x-1/2).
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What is 2 2/3 of 52 in fractions
75 litres of water by 15%
Answer:
11.25 litres
Step-by-step explanation:
75 ×15/100
=11.25 so the answer should be 11.25 litres
What is the perimeter of the shape?
8 ft
15 ft
15 ft
8 ft
ft
Answer: 46 ft
Step-by-step explanation:
You didn't specify what those numbers mean, so I'm going to assume they're the length of the sides of the shape.
The perimeter equals the sum of all sides' lengths of the shape.
So, it equals 8 + 8 + 15 + 15 = 46 ft
Find the volume of a cube with the given side lengths.
1/5b^3
The volume of the cube with the given side length is 1/125b⁹
Calculating the volume of a cubeFrom the question, we are to determine the volume of the given cube.
The volume of a cube is given by
V = s³
Where V is the volume of the cube
and s is the side length of a side of the cube
From the given information,
s = 1/5b³
Thus,
The volume of the cube will be
V = 1/5b³ × 1/5b³ × 1/5b³
V = 1/5 × 1/5 × 1/5 × b³ × b³ × b³
V = 1/125 × b⁹
V = 1/125b⁹
Hence,
The volume is 1/125b⁹
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7. The area of the shaded triangle in the figure
at the right is 43 square inches. What is the
area of the rectangle?
Area of rectangle is 86 square inches.
What is area of triangle?
In a two-dimensional plane, a triangle's area is the area that it completely encloses. A triangle is a closed shape with three sides and three vertices, as is common knowledge.The total area occupied by a triangle's three sides is referred to as its area. Half of the product of the triangle's base and height provides the general formula for calculating the area of the triangle.What is area of rectangle ?
To find the area of a rectangle, we multiply the length of the rectangle by the width of the rectangle.Area of triangle = 1/2 * b* h
43 = 1/2 *b * h
86 = b * h
Area of rectangle = Length * Breadth
We know that base of triangle = Breadth of the rectangle and
Height of triangle = length of triangle
So, Area of rectangle is 86 square inches.
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Solve the inequality 4x-14<6
Answer:
x<5
Step-by-step explanation:
1. add 14 to both sides
4x - 14 + 14 < 6 + 14
4x<20
2. divide both sides by 4
[tex]\frac{4x}{4} < \frac{20}{4}[/tex]
x<5
Answer = x<5
Triangle A'B'C' is the image of AABC under a reflection. Given A(-2, 5), B(0, 9), C(3, 7), A'(5,-2), B'(9, 0), and C(7,3), what is the line of reflection?
For given transformation of ΔABC to ΔA'B'C' the line of reflection is x = y
Triangle A'B'C' is the image of ΔABC under a reflection.
Given A(-2, 5), B(0, 9), C(3, 7),
A'(5,-2), B'(9, 0), and C'(7,3)
We need to find the line of reflection.
We can observe that the coordinates (x, y) of preimage are transformed to (y, x) in image.
This means, the line of reflection is x = y
Therefore, for given transformation of ΔABC to ΔA'B'C' the line of reflection is x = y
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Find the critical values, and, for confidence level = 90% and n = 15.
I need help I really don’t get this question
The surface area of prism is 224 square centimeter
The surface area of the prim = 2 × Area of the hexagonal face + 6 × Area of the rectangular face
The area of the hexagonal face = 42 square centimeter
The area of the two hexagonal face = 2×42
= 84 square centimeter
The area of the one rectangular face = length × width
= 4 × 8
= 32 square centimeter
The area of the 6 rectangular face = 6 × 32
= 192 square centimeter
The surface area of the prim = 32 + 192
= 224 square centimeter
Hence, the surface area of prism is 224 square centimeter
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PLEASE SOMEONE HELP
ASAP!!!!!!!!!!!!!
The value of x in the given trigonometric function is 7.37
what is trigonometric ratios?Trigonometric ratios are the ratios of the length of sides of a triangle. These ratios in trigonometry relate the ratio of sides of a right triangle to the respective angle. The basic trigonometric ratios are sin, cos, and tan, namely sine, cosine, and tangent ratios. The other important trig ratios, cosec, sec, and cot, can be derived using the sin, cos, and tan respectively.
5cos(5x) = 4
divide both sides by 5, it becomes,
cos(5x) = 4/5
cos(5x) = 0.8
taking Arc cos on both sides
5x = Arc cos 0.8
5x = 36.87
x = 36.87/5
x = 7.37 to 2 decimal places
In conclusion the value of x is 7.37
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your R&D department is testing the falling pattern for a new shell to be used for artillery. To perform this test your team tosses a test shell off the edge of a cliff towards a river. Molly, a mathematician team member, was observing and obtained a digital picture of this fall. Using her mathematical knowledge molly modeled the shells fall with the following quadratic functions.
h(t)=-16t^2+32t+48
h(t)=-16(t+1)(t-3)
h(t)=-16(t-1)^2+64
a) why does molly have three equations?
b)could you convince the others that all three of these rules are mathematically equivalent? Justify your answer.
c) which of the forms would be most helpful in answering questions d-f? explain.
d)what is the maximum height the shell reaches and when will it occur? show your work.
E)when should the shell splash into the river? show your work
F)at what height was the shell when it was tossed off the cliff? show your work
a) She has three quadratic equations as one is the standard form, the other gives the roots, and the other gives the vertex.
b) If the distributive property is applied and the like terms combined, all the equations will have the same result.
c) The most helpful equations will be given for each point.
d) Maximum height of 64 feet after 1 second from h(t)=-16(t-1)^2+64.
e) The shell splashes into the river after a time of three seconds, from h(t)=-16(t+1)(t-3).
f) The shell was at a height of 48 feet when tossed into the river, from h(t)=-16t^2+32t+48.
What is the meaning of each quadratic function?In standard format, the quadratic function is given as follows:
h(t) = -16t² + 32t + 48.
From this, the relevant information is the initial height from which the shell was tossed off the cliff, which is the c-coefficient of 48 feet.
The roots of the equation are given from the rule presented as follows:
h(t)=-16(t+1)(t-3).
Hence the shell splashes into the river at the positive root of h(t), that is:
t - 3 = 0 -> t = 3.
Expanding the equation, we have that it is equivalent to the first one, as:
-16(t + 1)(t - 3) = -16(t² - 2t - 3) = -16t² + 32t + 48.
The vertex-form quadratic equation is given as follows:
h(t) = -16(t - 1)² + 64.
Meaning that a maximum height of 64 feet was reached after one second.
Expanding the equation, we have that:
h(t) = -16(t - 1)² + 64 = -16(t² - 2t + 1) + 64 = -16t² + 32t - 16 + 64 = -16t² + 32t + 48.
Which is also equivalent to the first one.
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Angel hired Chris as a housekeeper starting on January 2 at $750 monthly. Angel does not withhold any federal taxes. Assume that Chris is not a housekeeper for anyone else. Assume that Angel paid $2,250 in wages for the fourth quarter of 2021.
Required:
How much in social security tax should Angel pay?
How much Medicare tax should Angel pay?
How much FUTA tax should Angel pay?
Assume that Chris is not a housekeeper for anyone else. Assume that Angel paid $2,250 in wages for the fourth quarter of 2021. The social security tax is $1,116, Medicare tax is $261 and FUTA tax is $42.
How to find the social security , Medicare and FUTA tax?Social security =12.4%
Medicare = 2.9%
FUTA = 0.6%
a. Social security tax
Yearly salary = $750 × 12 months
Yearly salary = $9,000
Social security tax = $9,000 ×12.4%
Social security tax = $1,116
b. Medicare tax
Yearly salary =$750 × 12 months
Yearly salary = $9,000.00
Medicare tax = $9,000×2.9%
Medicare tax = $261
c. FUTA tax
Yearly salary = $750 × 12 months
Yearly salary = $9,000
The first $7,000 will be subject to FUTA tax.
FUTA tax = $7,000 ×0.6%
FUTA tax = $42
Therefore the social security tax is $1,116.
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