the answer is 3 because if you add those together you will get 3
Abe can mow a lawn in 3 hours. After he has been working for 1/3 hour, Bob helps, and working together, it takes 1 and 2/3 hours more to finish the job. How long would it take Bob to mow the lawn by himself?
Please show work.
Bob would take 5 hours to mow the law by himself.
Let us consider, the area of the lawn to be mowed to be x inch².
It is given that the law can be mowed by Abe alone in 3 hours.
We know that,
Rate of work = Work/Time
⇒ rate of work of Abe = area to be mowed(work)/time taken
= (x/3) inch²/hour
Now,
Abe has been working alone for 1/3 hour
⇒work done by Abe alone = rate of work of Abe x time
= (x/3) inch²/hour x 1/3 hour
= x/9 inch²
Remaining work = x - x/9 = 8x/9 inch²
Let, the rate of work of Bob be y inch²/hour.
It is given that the time taken by Abe and Bob to complete the remaining work together is 1 and 2/3 hours, i.e, 5/3 hours.
Therefore,
The rate of work of Abe and Bob when working together
= work ÷ time
=(8x/9) ÷ (5/3)
=8x/15 inch²/hour
⇒ Rate of work of Abe + Rate of work of Bob = 8x/15
⇒ x/3 + y = 8x/15
⇒ y = (8x/15) - (x/3)
⇒ y = 3x/15 = x/5 inch²/hour
Thus, the time taken by Bob to mow the law by himself
= work ÷ rate of work
= x inch² ÷ (x/5) inch²/hour
= 5 hours
So, it would take 5 hours for Bob to mow the lawn alone.
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A constant unit force vector makes angle 30 with the positive x - axis. Find the work done by the force in moving the object 17 units in the direction of the positive x - axis. g
Answer:
The work done by the constant unit force vector in moving the object 17 units in the positive x-axis direction is equal to the magnitude of the force multiplied by the displacement in the direction of the force. Since the force makes an angle of 30 degrees with the x-axis, the magnitude of the displacement in the direction of the force is equal to the displacement in the x-axis direction multiplied by the cosine of 30 degrees. Therefore, the work done is equal to the magnitude of the force multiplied by 17 multiplied by the cosine of 30 degrees. hope this helped
A true-false question is to be posed to a husband-and-wife team on a quiz show. Both the husband and the wife will independently give the correct answer with probability p. Which of the following is a better strategy for the couple?
a.) Choose one of them and let that person answer the question.
b.) Have them both consider the question, and then either give the common answer if they agree or, if they disagree, flip a coin to determine which answer to give.
If p = .6 and the couple uses the strategy in part (b), what is the conditional probability that the couple gives the correct answer given that the husband and wife..
c.) agree?
d.) disagree?
The conditional probability that the couple gives the correct answer if the husband and wife agree is p = .6 and if husband wife don't agree is p=0.5, and statement B is the better strategy.
Option B, have them both consider the question, and then either give the common answer if they agree or, if they disagree, flip a coin to determine which answer to give is the better strategy.
c.) The conditional probability that the couple gives the correct answer if the husband and wife agree is p = .6.
d.) The conditional probability that the couple gives the correct answer if the husband and wife disagree is 0.5. This is because in this case, they must flip a coin to decide which answer to give.
Since the probability of both parties giving the correct answer is p = .6, but the probability of either party giving the correct answer is only 0.5,
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The bullseye on an archery target has a radius of 3 inches. The entire target has a radius of 9 inches. To the nearest hundredth, find the area of the target outside of the bullseye. Use 3.14 for π.
Answer:
226.1 [tex]in^{2}[/tex]
Step-by-step explanation:
If you need to take out a $80,000 student loan 2 years before duating, which loan option will result in the owest overall cost to you: a subsidized loan with 7.4% Interest for 10 years, a federal unsubsidized loan with 9% interest for 10 years, or a private loan with 5.0% interest and a term of 15 years? How much would you ave over the other options? All payments are deferred for 6 months after graduation and the interest is apitalized. Part: 0/5 Part 1 of 5 (a) Find the total cost of the subsidized loan. The total cost of the subsidized loan is S decimal places, if necessary. 10 Round your answer to two
Answer:
$139,200
Step-by-step explanation:
To find the total cost of the subsidized loan, we need to calculate the total amount of interest that will be added to the loan over the 10-year repayment period. We can use the formula for simple interest:
I = Prt
Where:
I = Interest
P = Principal (the original loan amount)
r = Interest rate (expressed as a decimal)
t = Time (in years)
In this case:
I = 80,000 * 0.074 * 10 = 59,200
The total cost of the loan would be the sum of the principal and the interest:
80,000 + 59,200 = $139,200
So the total cost of the subsidized loan is $139,200.
Need help ASAP!!! This is due by tomorrow
Answer:
a= 17
Step-by-step explanation:
Since all sides are equal length, all angles must be equal. Since all of the angles of every triangle sum to 180*, 180/3= 60*. Therefore, (4a-8)*=60*
From there, we can solve for a by adding 8 to both sides:
(4a-8)+8=60+8
4a=68
Then we can divide both sides by 4 to get
(4a)/4= 68/4
a=17
Answer:
a = 17
Step-by-step explanation:
This seems to be an equilateral triangle, so the angle is 60 degrees. 68 - 8 is 60. 4a represents 4 × a, and we know 4 × a has to be 68. 68 / 4 is 17, meaning a = 17.
Pls help me with this question, the answer is not 278.63 square units
Answer:
375 square units
Step-by-step explanation:
Area = (1/2) h (a+b)
=1/2 × 10 (49+26)
= 5 × 75
= 375 square units
hope it helps you <3
[tex]\frac{c^{2}-d^{2} }{d^{2}+cd-2c^{2} }[/tex]
The value of the expression (c² - d²) / (d² + cd - 2c²) in the simplified form will be negative (c + d) / (d + 2c).
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.
The expression is given below.
⇒ (c² - d²) / (d² + cd - 2c²)
Factorize the numerator and denominator, then we have
⇒ (c² - d²) / (d² + cd - 2c²)
⇒ (c² + cd - cd - d²) / (d² + 2cd - cd - 2c²)
⇒ [c(c + d) - d(c + d)] / [d(d + 2c) - c(d + 2c)]
⇒ [(c + d)(c - d)] / [(d - c)(d + 2c)]
⇒ - [(c + d)(d - c)] / [(d - c)(d + 2c)]
⇒ - (c + d) / (d + 2c)
The value of the expression (c² - d²) / (d² + cd - 2c²) in the simplified form will be negative (c + d) / (d + 2c).
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DUE SOON please need as much help as possible!!
questions are down below please explain how you got the answer!!
Answer:
Va=4r³π
Step-by-step explanation:
Vb=(4/3)r³π, Vc=r²πh, h is the height of the cylindrical container.
h=12r.
So now the volume of the cylinder is:
Vc=r²π*12r=12r³π.
There are 6 balls so their total volume is:
6*Vb=6*(4/3)*r³*π=(24/3)*r³π=8r³π.
Now we subtract the volume of 6 balls from the volume of the cylinder to get the volume of air Va inside the cylinder:
Va=Vc-6*Vb=12r³π-8r³π=4r³π.
So the volume of air inside of the cylinder is Va=4r³π
Hope This Helps!
Answer:
Volume of air = 4πr³ (units cubed)
Step-by-step explanation:
[tex]\boxed{\begin{minipage}{4 cm}\underline{Volume of a cylinder}\\\\$V=\pi r^2 h$\\\\where:\\ \phantom{ww}$\bullet$ $r$ is the radius. \\ \phantom{ww}$\bullet$ $h$ is the height.\\\end{minipage}}[/tex] [tex]\boxed{\begin{minipage}{4 cm}\underline{Volume of a sphere}\\\\$V=\dfrac{4}{3} \pi r^3$\\\\where:\\ \phantom{ww}$\bullet$ $r$ is the radius. \\ \phantom{ww}$\bullet$ $h$ is the height.\\\end{minipage}}[/tex]
Model the squash ball as a sphere.
Assuming the six squash balls are packaged in a cylindrical container where each ball is one on top of the other, the height of the container is 6 times the height of a squash ball.
The height of a squash ball is its diameter, which is twice its radius.
Therefore, the height of the cylinder is 12 times the radius of the squash ball, and the radius of the cylinder is the radius of the squash ball.
Therefore:
[tex]\begin{aligned}\textsf{Volume of the cylinder}&=\pi r^2 \cdot 12 r\\&=12 \pi r^3\end{aligned}[/tex]
where r is the radius of the sphere (squash ball).
To find the volume of air inside the container, subtract 6 times the volume of a sphere from the volume of the cylinder.
[tex]\begin{aligned}\textsf{Volume of air}&=\textsf{Volume of cylinder}-\textsf{6 volume of sphere}\\&=12\pi r^3-6\left(\dfrac{4}{3} \pi r^3\right)\\&=12\pi r^3-8\pi r^3\\&=4\pi r^3\;\; \sf units \; cubed\end{aligned}[/tex]
Please help solve this question!
Answer:
lesser number: 9
greater number:41
Step-by-step explanation:
Given: a+b=50
Use the word problem to create equation: 5a-4=b
We can solve for either variables, we'll solve for b(greater number) first:
a=50-b
Plug a into other equation:
5(50-b)-4=b
250-5b-4=b
246-5b=b
246=6b
b=41
Plug what we found for b into equation to solve for a(lesser number):
a+41=50
a=9
Verify:
5(9)-4=41 ?
45-4=41
41=41 Checks out.
Hope this helps.
Write the equation of the line that passes through the points (-3, 3) and (1, 2).
Here is a list of equations. Circle all the equations that are identities. Be prepared to
explain your reasoning.
1. a = -a
2. a² + 2ab + b² = (a + b)²
3. a² - 2ab + b² = (a - b)²
4. a²b² = (a - b)(a - b)
5. (a + b)(a²- ab + b²) = a³ - b³
6. (a - b)³=a³-b³-3ab(a + b)
7.a²(a - b)4-b²(a - b) = (a - b)²(a + b)
Answer:
2356
Step-by-step explanation:
Tommy's four dogs, Fido, Jack, Sam, and Lilly, went to the vet to be weighed. Fido weighed 27 pounds, Jack weighed 37.5 pounds, Sam weighed 53 pounds, and Lilly weighed 16 pounds.
What is the total weight of the four dogs?
A.103 pounds
B. 147.9 pounds
C.112.9 pounds
D.122.9 pounds
Answer: 133.5
Step-by-step explanation:
Add the weights together and, for some reason, you get 133.5
Answer:
133.5 pounds------------------------------------
Add the four numbers together to get the total weight:
27 + 37.5 + 53 + 16 = 133.5 poundsIt doesn't match any options, please double check if they are (or given weights) correct.
Dr. Hall is studying an endangered fox whose population is declining by 20% every year. If there are currently 3,746 foxes, how many will remain in 4 years?
If necessary, round your answer to the nearest whole number.
Using exponential function, The total number of foxes that will remain after 4 years is 1534.
What is Exponential Function?A mathematical function with the formula f (x) = an x is an exponential function. where an is a constant known as the function's base and x is a variable. The transcendental number e, or roughly 2.71828, is the exponential-function base that is most frequently encountered.
We employ the exponential function because...
In the biological sciences, exponential functions are frequently employed to simulate the evolution of a certain quantity over time, such as population number. Experimental data graphs are often created with the quantity on the y-axis and the time on the x-axis.
Using exponential function,
P(t) = A . b^t
Formulate: 3746 based on the provided conditions. (1 - 20%) ⁴
Analyze the following formula or expression: 1534.3616
he total number of foxes that will remain after 4 years is 1534
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Decide wether the points are vertices of a right triangle. (1,2),(3,0),(3,3)
True or False: An Obtuse angle is between 91 and 179 degrees
Answer:
True
Step-by-step explanation:
An obtuse angle is an angle that is greater than 90 degrees but less than 180 degrees. An obtuse angle is also called a reflex angle. A reflex angle is formed when the arms of an angle point in opposite directions. The degree of an obtuse angle is between 91 and 179 degrees. Therefore, it's true.
Hope it helps! :)
Answer:
True
Step-by-step explanation:
An obtuse angle measures more than 90 degrees and 180 degrees. So 179 is greater than 90 degrees and less than 180 degrees.
If the length of a rectangular field is 7 feet less than six times its width, and the perimeter is 140 feet.
Length of a rectangular field is_____
feet.
From the given data, using perimeter of rectangle, Length(L) = 6 × 11 - 7 of the rectangular field.
The length of a shape's outline is its perimeter. You must add the lengths of all four sides of a rectangle or square to determine its perimeter. In this instance, x represents the rectangle's length and y its width. P = x+x+y+y, where P is the perimeter.
Let length of the rectangular field = L
Width of rectangular field = W
Given,
length of a rectangular field is 7 feet less than six times its width
perimeter is 140 feet,
According to the question,
L = 6W - 7
Perimeter of the rectangle = 2 (L + W)
140 = 2 (6W - 7 + W)
140 = 2 (7W - 7)
70 = 7 W - 7
77 = 7 W
W = 11
L = 6 × 11 - 7
Length = 59
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identify the transformation of the following functions from the parent function f(x)= 1/x
The parent function is the simplest form of the type of function in the graph is g(x) = 1/x
What is graph ?
In mathematics, a graph is a collection of points, called vertices, and lines, called edges, that connect the vertices. Graphs are used to represent networks of communication, data organization, computational devices, the flow of computation, and more. Graphs are one of the most fundamental concepts in mathematics, and they are used to model many real-world problems and situations.
The transformation from the first equation to the second one can be found by finding a, h and k for each equation.
y = a / x-h + k
Find a, h and k for
g(x)= 1/x
a = 1
h=0
k = 0
The horizontal shift depends on the value of h and The horizontal shift is described as :
f(x) = f(x+h) The graph is shifted to the left h units
f(x) = f(x-h) The graph is shifted to the right h units.
Horizontal shift depends on the value of k and The horizontal shift is described as :
f(x) = f(x+k) The graph is shifted to up k units
f(x) = f(x-k) The graph is shifted down k units.
Vertical shift : none.
The sign of a describes the reflection across the x-axis. −a means the graph is reflected across the x-axis.
Reflection about the x-axis: None
To find the transformation, compare the two functions and check to see if there is a horizontal or vertical shift, reflection about the x-axis, and if there is a vertical stretch.
Parent Function: g(x) = 1/x
Horizontal Shift: None
Vertical Shift: None
Reflection about the x-axis: None
Hence, The parent function is the simplest form of the type of function g(x) = 1/x .
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if the radius is 10 ft,what will be the area of the circle?
The area of the circle having a radius of 10 ft will be 100π.
What is an area?The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the circle in a two-dimensional plane is called the area of the circle.
Given that the radius of the circle is 10 ft. The area of the circle is calculated by the formula written as below,
Area of the circle = πr²
Substitute the value of the radius in the formula and calculate the area of the circle.
Area of the circle = πr²
Area of the circle = π x ( 10 ) ²
Area of the circle = 100π square ft
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if x k converges to x, and yk converges to y, does xk/yk converge to x/y math?
Yes, xk/yk converges to x/y. This can be proven mathematically using the definition of a limit.
If xk converges to x and yk converges to y, then the limit of xk/yk as k approaches infinity is equal to the limit of x/y. This can be expressed algebraically as limk→∞xk/yk = limk→∞x/y, which is equal to x/y. Thus, xk/yk converges to x/y.
To calculate this, we can take a sequence of xk an yk values, and divide every xk by its corresponding yk. For example, if xk = {2, 4, 8, 16, 32} and yk = {1, 2, 4, 8, 16}, then the sequence xk/yk = {2/1, 4/2, 8/4, 16/8, 32/16} = {2, 2, 2, 2, 2}. This sequence converges to 2, which is equal to x/y. Therefore, xk/yk converges to x/y.
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What is the slope of the function, represented by the table of values below?
slope = (y2 - y1)/(x2 - x1) = (13 - 5)/(-2-0) = 8/-2 = -4
Answer:
-4
Step-by-step explanation:
The perimeter of the TCL 3-Series Roku Smart TV is 112 inches. The width of the TV is 16 inches greater than its height. Find the width and the height of the TV.
Answer: Height = 20 inches, Width = 36 inches
Step-by-step explanation:
Let the height be [tex]h[/tex] and the width be [tex]h+16[/tex].
Using the formula for the perimeter of a triangle,
[tex]2(h+h+16)=112\\\\2(2h+16)=112\\\\2h+16=56\\\\2h=40\\\\h=20 \implies h+16=36[/tex]
assume 85% of people actually show up for thier flight on time. because of this, airlines tend to overbook flights. a random sample of 220 booked passengers is taken and whether or not they showed up on time is recorded for each of them.
The sample proportion based on the question that we have here is 0.85
What is sample proportion?
The sample proportion (p) indicates the percentage of people in a sample who exhibit a particular quality or attribute. Divide the number of individuals (or items) who have the desired attribute by the overall sample size to obtain the sample proportion.
P=X/N, where X represents the number of successes and N represents the sample size, yields the sample proportion.
Hence from the question, we see that 85% of the passengers booked for flights actually show up. hence the proportion is 0.85.
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Which pair of variables is two different scales of measure and why?
Question options:
number of goals scored and penalty minutes
height and IQ
lipstick shades and brands of athletic shoes
laptop price ($) and memory capacity (GB)
The pair of variables "laptop price ($) and memory capacity (GB)" are two different scales of measure.
What is the variable?
A variable is a quantity that may be changed according to the mathematical problem. The generic letters which are used in many algebraic expressions and equations are x, y, z. In other words, a variable is a symbol for a number where the value is not known. For example, x + 5 = 10. Here “x” is a variable.
This is because "laptop price" is measured in dollars, which is a monetary unit, and "memory capacity" is measured in GB (gigabytes), which is a unit of data storage.
These are two different types of measurement and cannot be directly compared.
On the other hand, "a number of goals scored" and "penalty minutes" are both measures of performance in a sport and can be directly compared.
"Height" and "IQ" are both measures of human characteristics, although they are different in nature, but they can also be compared.
"lipstick shades" and "brands of athletic shoes" are both consumer products, but they are not directly related and cannot be compared.
Hence, The pair of variables "laptop price ($) and memory capacity (GB)" are two different scales of measure.
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A rule for a histogram that decides into which class intervals subjects are placed if their value is on the boundary between two intervals.
A rule for a histogram that decides into endpoint convention class intervals subjects is placed if their value is on the boundary between two intervals.
Endpoints are defined as physical devices that connect to and exchange information with a computer network.
There are some examples of endpoints:
They are mobile devices, desktop computers, virtual machines, embedded devices, and servers.
Internet-of-Things devices like cameras, lighting, refrigerators, security systems, smart speakers, and thermostats are also examples of endpoints.
When a device connects to a network, the flow of information between, for instance, a laptop and a network, is much like a conversation between two people over the phone.
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Use synthetic division to show that x = 5/2 is a zero of the function f(x) = 2x^3 - 5x^2 - 6x + 15
x = 5/2 is a zero of the function f(x) = 2x³ - 5x² - 6x + 15.
What is a function?
A function in mathematics from a set X to a set Y allocates precisely one element of Y to each part of X. The sets X and Y are collectively referred to as the function's domain and codomain, respectively. Initially, functions represented the idealized relationship between two changing quantities.
Here, we have
Given: x = 5/2 is a zero of the function f(x) = 2x³ - 5x² - 6x + 15,
f(x) = 2x³ - 5x² - 6x + 15
When we f(x) = 2x³ - 5x² - 6x + 15 by x-5/2 we get
Remainder = -10
Quotient = 2x² - 6
Divisor = x - 5/2
2x³ - 5x² - 6x + 15 = 2x² - 6 - 10/(x - 5/2)
Hence, x = 5/2 is a zero of the function f(x) = 2x³ - 5x² - 6x + 15.
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HELP ME OUT PLEASE!!!!!!
The range of the function y = -2x² + 12x - 13 will be [5, -∞). Then the correct option is A.
What is the equation of the parabola?Let the point (h, k) be the vertex of the parabola and a be the leading coefficient.
Then the equation of the parabola will be given as,
y = a(x - h)² + k
The domain means all the possible values of x and the range means all the possible values of y.
The equation is given below.
y = -2x² + 12x - 13
Convert the equation into a vertex form, then we have
y = -2x² + 12x - 13
y = -2x² + 12x - 18 + 18 - 13
y = -2(x² - 6x + 9) + 18 - 13
y = -2(x - 3)² + 5
The range of the function y = -2x² + 12x - 13 will be [5, -∞). Then the correct option is A.
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3 ^ (12/5) * root(3 ^ b, a) = 3 ^ 2 * sqrt(3)
The value of the expression: (5 + √3)/(2- √3) = 13 +7√3
How to rationalize the surd?The given surd to be rationalized is (5 + √3)/(2- √3)
Using a²-b² = (a+b)(a-b)
You can rewrite the value 1 in many ways as 2/2, 16/16, or 1 = (5 + √3)/(2-+√3)
Multiplying by 1 but in the form 1 = (2 + √3)/(2- √3) given
(5 + √3)/(2- √3) * (2 + √3)/(2-+√3)
⇒ (5 + √3)(2+√3) / [2² - (3√2)²]
Simplifying the surd to have
(10+ (5 + √3 + 2√3 + 3)/4-1
Therefore this gives 13 + 7√3
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Correct question:
How do you simplify (5 + √3)/(2- √3)?
PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!
The function that best models the number of game consoles sold in millions since 2009 is g(x) = (25.5)(0.6)ˣ.
The correct option is B.
What is Exponential Growth?An exponential function's curve is created by a pattern of data called exponential growth, which exhibits higher increases over time.
y = a(1+r)ˣ,
where a is the initial population and r is the rate in decimals and sx is the time period.
Given:
The graph shows the number of game consoles sold in millions since 2009.
Let the function is,
g(x) = abˣ.
And graph passes through two points (0, 25.5) and (1, 15.3).
So,
when x = 0 then g(x) = 25.5.
That means, a = 25.5
And, when x = 1 then g(x) = 15.3.
That means,
15.3 = (25.5)b.
b = 0.6
Therefore, the function is g(x) = (25.5)(0.6)ˣ.
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the function b(r) shows the number of baskets of apples per tree an orchard farmer gets if there's r inches of rainfall during the summer then what can be formulated?
In an apple orchard, the density of planting determines how many of apples a single tree will produce. An illustration of this is Y=X².
What is meant by function?There are different kinds of means in mathematics, especially in statistics. Each mean summarises a specific set of data, frequently in order to assess the overall importance of a specific data set.A function is a relationship where each input has one and only one output and where there are many inputs.A rule, law, or mathematical formula that establishes the relationship between the independent variable and the dependent variable (the dependent variable).A function is an example of a rule because it produces one output from one input. Alex Federspiel is who took the photos. Y=X2 provides an example of this.To learn more about function, refer to:
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