Answers
Answer:
B) 5 weeks
Step-by-step explanation:
We need to put each person in an equation where w is weeks and t is time:
50 + 15w = t
75 + 10w = t
Because we are calculating when they are the same, they can be equal to each other:
50 + 15w = 75 + 10w
Move the two integer values to one side (don't forget to change the operation to its opposite counterpart):
15w = 75 - 50 + 10w
Move the 10w value over to the other side.
15w - 10w = 75 - 50
Subtract like normal:
5w = 25
Cancel down by dividing both sides by 5:
\(\frac{5w}{5} = \frac{25}{5}\)
This simplifies to:
w = 5
Meaning that it will take 5 weeks to have the same amount, so the answer is B.
Hope this helps!
Related Questions
Three more than twice a number x is 15. Determine the value of x.
Answers
Answer:
Pretty sure the answer would be x=6
Step-by-step explanation:
The number (x) in: "3 more than twice a number is 15" is what we are solving here.
In other words, you are looking for a number (x) that if you multiply it by two (same as twice) and then add 3, you get 15.
To solve this, you first write the problem as an algebra equation as follows: 2x + 3 = 15
Then you solve the equation by subtracting 3 from both sides, and then divide both sides by 2. Here is the math to illustrate better:
2x + 3 = 15
2x + 3 - 3 = 15 - 3
2x = 12
2x/2 = 12/2
x = 6
what was the most inaccurate version of pi? explain who, when and what the value was.
Answers
The value of pi is known to over 31 trillion decimal places, thanks to the use of powerful computers and sophisticated algorithms.
Describe about the history of pi?The history of pi dates back thousands of years, and over time, various civilizations have attempted to calculate its value with varying degrees of accuracy. One of the most inaccurate versions of pi was recorded by the ancient Babylonians around 2000 BC.
The Babylonians calculated the value of pi as 3.125, which is off by more than 6% from the actual value. It is believed that the Babylonians arrived at this value by using a rough approximation of a circle as a hexagon. They measured the perimeter of the hexagon and divided it by the diameter to get their approximation of pi.
This value was later refined by the ancient Egyptians and Greeks, who were able to calculate pi with greater accuracy. The Greek mathematician Archimedes, for instance, was able to calculate pi to within 1% accuracy by using a method of exhaustion.
It wasn't until the development of calculus in the 17th century that mathematicians were able to derive an exact formula for pi. Today, the value of pi is known to over 31 trillion decimal places, thanks to the use of powerful computers and sophisticated algorithms.
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The table gives the values of a function obtained from an experiment. Use the table to estimate 9 3 f(x) dx using three equal subintervals and a right riemann sum, left riemann sum, and a midpoint sum.
Answers
Using three equal subintervals and a right riemann sum, left riemann sum, and a midpoint sum is -6.4, 3.8, -1.0.
1) Integral with left end points:
A-left = -3.4*2 + (-0.6)*2 + 0.8*2 = -6.4
2) Integral with right end points:
A-right = -0.6*2 + 0.8*2 + 1.7*2 = 3.8
3) Integral with midpoints:
A-mid = -2.2*2 + 0.2*2 + 1.5*2 = -1.0
A specific type of approximation of an integral by a finite sum in mathematics is known as a Riemann sum. It bears the name of the German mathematician Bernhard Riemann from the nineteenth century. Approximating the area of functions or lines on a graph, as well as the length of curves and other approximations, is a highly typical use.
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Jasmine works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per
week. If y=7x represents Jasmine's earning, what are the values in the domain?
)
A)
xS15
B)
0sxs15
1sxs15
D)
all real numbers
Answers
Answer:
the answer is mx +B plus the quradratic formula
I am part of a whole. I am four times as large as one-fifth. I am a decimal. What am I?
Answers
Answer:
0.80
Step-by-step explanation:
I did the math 5 times
5. Identify the number that is the value of 600.
A. 6,000
B. 6
C. 60
D. 0.6
Answers
Answer:
I think it's 6 or 0.6
the three inside angles are(A,B and C) of a right-angled triangle are the ratio 7:18:11. The smallest abbé is 35 degrees. Work out angle A,B and C
Answers
Answer:
a
Step-by-step explanation:
Answer:
it is b i believe this this this this this thsidjcbd dbchf f f f f f f. f f r r f f f f f
Step-by-step explanation:
Using the following weights:.3, 2, .5 find the forecast for the next period. Month 1 – 381, Month 2-366, Month 3 - 348. O a. 143 O b. 241 O c. 360 O d. 421
Answers
The forecast for the next period using the following weights: 0.3, 2, 0.5 is Option d. 421.
To compute the forecast for the next period, we'll use the weighted moving average (WMA) formula.WMA formula:
WMA = W1Yt-1 + W2Yt-2 + ... + WnYt-n
Where, WMA is the weighted moving average
W1, W2, ..., Wn are the weights (must sum to 1)
Yt-n is the demand in the n-th period before the current period
As we know Month 1 – 381, Month 2-366, and Month 3 - 348.
Weights: 0.3, 2, 0.5
We'll compute the forecast for the next period (month 4) using the data:
WMA = W1Yt-1 + W2Yt-2 + W3Yt-3WMA
= 0.3(381) + 2(366) + 0.5(348)WMA
= 114.3 + 732 + 174WMA
= 1020.3
Therefore, the forecast for the next period is 1020.3, which rounds to 421. Hence, option d is correct.
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10-2 area about the x axis. 6. Determine the moment of inertia of the composite 150 mm 1150 mm 1 100 mm 100 mm 75 mm 300 mm.
Answers
Answer:21
Step-by-step explanation:
The resistance of a wire, R ohms , is directly
proportional to its length , I meter , and inversely
proportional to the square of its radius , r meter.
(a) Express R in terms of l , r and a constant k.
(b) Maker the subject of the formula in (a).
(c) (i) Given that a wire with a length of 2 m and a radius of 0.5 cm has a resistance of 40 ohms , use your answer in (a) to find the value of k.
(ii) Hence , use your answer in (b) to find the radius of a wire with a length of 4 meters and a resistance of 60 ohms
Answers
Answer:
Step-by-step explanation:
Circle the number in each row that is NOT a perfect square:
please help me!
Answers
Answer:
wdym?
Step-by-step explanation:
Answers:
First row = 3
Second row = 12
===================================================
Explanation:
Think of a square that has sides of 5 by 5. It's area will be 5*5 = 25. That means 25 is a perfect square.
We rule out 81 for similar reasons because 81 = 9*9
Also, 100 = 10*10 and 121 = 11*11
The only thing left is 3 which isn't a perfect square. We cannot multiply two of the same whole number to end up with an area of 3 square units.
Put another way, \(\sqrt{3}\) is not a whole number while something like \(\sqrt{81} = 9\) is a whole number.
This is all for the first row.
--------------------------
The second row is the same story.
4 = 2*2
9 = 3*3
144 = 12*12
36 = 6*6
This rules out everything but 12 in the second row. You can determine what is a perfect square through trial and error, or by memorizing what the perfect square numbers look like. With enough practice, they should be fairly memorized by some point.
what is the main disadvantage of loocv approach? hint: imagine we have 10000 observations and 20 variables.
Answers
The main disadvantage of the LOOCV (Leave-One-Out Cross Validation) approach is that it is computationally expensive. This means that it takes a lot of time and resources to run the model, especially when you have a large dataset with many observations and variables. In the case of 10,000 observations and 20 variables, the LOOCV approach would require running the model 10,000 times, each time leaving out one observation and using the rest of the data to train the model. This can be extremely time-consuming and may not be practical for large datasets.
Another disadvantage of the LOOCV approach is that it can lead to overfitting, where the model becomes too complex and performs well on the training data but poorly on new data. This is because the LOOCV approach uses almost all of the data for training, which can lead to a model that is too closely fit to the training data and may not generalize well to new data.
Overall, while the LOOCV approach can be a useful tool for model validation, it may not be the best choice for large datasets due to its computational expense and potential for overfitting.
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The main disadvantage of the LOOCV (Leave-One-Out Cross Validation) approach is that it is computationally expensive. This means that it takes a lot of time and resources to run the model, especially when you have a large dataset with many observations and variables. In the case of 10,000 observations and 20 variables, the LOOCV approach would require running the model 10,000 times, each time leaving out one observation and using the rest of the data to train the model. This can be extremely time-consuming and may not be practical for large datasets.
Another disadvantage of the LOOCV approach is that it can lead to overfitting, where the model becomes too complex and performs well on the training data but poorly on new data. This is because the LOOCV approach uses almost all of the data for training, which can lead to a model that is too closely fit to the training data and may not generalize well to new data.
Overall, while the LOOCV approach can be a useful tool for model validation, it may not be the best choice for large datasets due to its computational expense and potential for overfitting.
```
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(10 Points) Question In Picture:
Answers
Answer:
10. you're welcome, good Luckk!
Convert 8 meters into feet.
Answers
Answer:26.2467
Step-by-step explanation: 8 meters=26.2467 Feet
18. STREETS If Pine Street is parallel to Locust
Street, find the values of a and b. (Lesson 3-7)
Answers
Answer:
b=98 and a=82
Step-by-step explanation:
b and 98 are corrisponding angles which means that they are both 98
a+b=180 because it is a straight line
a+98=180 subtract 98 from both sides a d you get a=82
A shop item is marked down from r 6,20 to r 4. what is the discount? what is the discount percentage?
Answers
Discount is 0.354838, Discount percentage is 35.4838 %.
According to the question
A shop item is marked down from r 6.20 to r 4.
A discount is an amount that is subtracted from the regular price of an item.
Based on the given conditions
= \(\frac{6.2-4}{6.2}\)
Solving 6.2 - 4, we get 2.2
= 2.2/6.2
Discount = 11/31 = 0.354838
Percentage discount is a discount that is given to a product or service that is given as an amount per hundred. For example, a percentage discount of 20% would mean that an item that originally cost $100 would now cost $80.
Discount percentage = \(\frac{11}{31}\) × 100
= 35.4838 %
Hence,
Discount is 0.354838, Discount percentage is 35.4838 %.
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plzzzzz this is all the points i can give bc i have 14
PLZZZ help
Answers
Answer:
if its double the size of 3 ft that will be a 6 foot room
please solve all these questions correctly.
2. A function is given by \( f(x)=0.2+25 x+3 x^{2} \). Now answer the following based on this function: (a) (5 marks) Use the Trapezium rule to numerically integrate over the interval \( [0,2] \) (b)
Answers
We need to calculate the numerical integration of this function using the Trapezium rule over the interval [0, 2].The formula of the Trapezium rule is given by:
\($$ \int_{a}^{b}f(x)dx \approx \frac{(b-a)}{2n}[f(x_0) + 2f(x_1) + 2f(x_2) + ... + 2f(x_{n-1}) + f(x_n)] $$\)
where, \($$ x_0 = a, x_n = b \space and \space x_i = a + i \frac{(b-a)}{n}$$\)
Now,
a) We are given a function as: $$ f(x) = 0.2 + 25x + 3x^2$$
we can calculate the numerical integration as:\($$ \begin{aligned}\int_{0}^{2}f(x)dx & \approx \frac{(2-0)}{2}[f(0) + f(2)] + \frac{(2-0)}{2n}\sum_{i=1}^{n-1}f(x_i) \\& \approx (1)(f(0) + f(2)) + \frac{1}{n}\sum_{i=1}^{n-1}f(x_i) \end{aligned}$$\)
We can find the value of f(x) at 0 and 2 as:
\($$ f(0) = 0.2 + 25(0) + 3(0)^2 = 0.2 $$$$ f(2) = 0.2 + 25(2) + 3(2)^2 = 53.2 $$\)
Now,
let's find the value of f(x) at some other points and calculate the sum of all values except for the first and last points as:
\($$ \begin{aligned} f(0.2) &= 0.2 + 25(0.2) + 3(0.2)^2 = 1.328 \\ f(0.4) &= 0.2 + 25(0.4) + 3(0.4)^2 = 3.248 \\ f(0.6) &= 0.2 + 25(0.6) + 3(0.6)^2 = 6.068 \\ f(0.8) &= 0.2 + 25(0.8) + 3(0.8)^2 = 9.788 \\ f(1.0) &= 0.2 + 25(1.0) + 3(1.0)^2 = 14.4 \\ f(1.2) &= 0.2 + 25(1.2) + 3(1.2)^2 = 19.808 \\ f(1.4) &= 0.2 + 25(1.4) + 3(1.4)^2 = 26.128 \\ f(1.6) &= 0.2 + 25(1.6) + 3(1.6)^2 = 33.368 \\ f(1.8) &= 0.2 + 25(1.8) + 3(1.8)^2 = 41.528 \\\end{aligned}$$\)
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two birds are flying in the air. bird A is currently 500 feet in the air and is decending at a constant rate of 75 ceet per minute. bird b who is originally 100 feet in the air begins to increse in altitude at a constant rate of 25 feet per minute. bird a begins to asend in the air at the same time bird b begins to desend in the air
Questions:
What is bird A’s height above the ground?
What is bird B’s height above the ground?
After how many minutes did the two birds reach the same height?
When is bird A above bird B?
When is bird B above bird A?
after 1 minute what is the difference in height between the birds?
Answers
The difference between the two high altitudes is therefore 300 feet.
How to solveLet 't' denote the time in minutes when both birds are at the same height. If both of these fowls are traveling, one descending and the latter ascending, then we obtain a formulaic value for t using the equations below.
Distance descended by bird A = 75tDistance ascended by bird B = 25tOriginal altitude-distance difference = 500 - 100 = 400 feetTherefore, if we solve: 75t - 25t = 400, it follows that 50t = 400 and t = 8 minutes.
Given this information, after 8 minutes, the two birds reach the same height.
Consequently, before the 8-minute interval, bird A is situated at a higher level than bird B since the prior's rate of descent is less than the current bird's ascent.
Once they have reached the shared altitude, bird B is above bird A given its continuous upward elevation, contrasting against bird A's descending course.
Their heights after only 1 minute has elapsed; the Height of bird A after 1 minute is calculated to be 425 feet - (500 - 75(1)) and for bird B it is 125 feet - (100 + 25(1)).
The difference between the two high altitudes is therefore 300 feet.
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You initially invest 500 in a savings account that pays yearly interest rate of 3.5%. write a formula for an exponential function giving the balance in your account as a function of the time, in years, since your initial investment.
Answers
The formula for the exponential function giving the balance in your account as a function of time, in years, since your initial investment is B(t) = 500 * (1 + 0.035)^t.
where B(t) represents the balance in the account after t years.
In this scenario, the initial investment is $500, and the yearly interest rate is 3.5%. To determine the balance in the account after a certain number of years, we use the formula for compound interest.
The general formula for compound interest is given by B(t) = P * (1 + r)^t, where B(t) is the balance after t years, P is the principal (initial investment), r is the interest rate (expressed as a decimal), and t is the time in years.
In this case, the principal (initial investment) is $500, and the interest rate is 3.5% or 0.035 as a decimal.
Therefore, the formula for the balance in the account becomes B(t) = 500 * (1 + 0.035)^t.
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Given AB=15cm,BC=20cm.Find AB correct 3 significant
(question refer to a triangle ABC which is right -angled at C)
Answers
The length of AB is 25 units
How to determine the length AB?The given parameters are
AC = 15 cm
BC = 20 cm
The triangle is right -angled at C.
So, we have:
AB^2 = AC^2 + BC^2
This gives
AB^2 = 15^2 + 20^2
Evaluate
AB^2 = 625
Take the square roots
AB = 25
Hence, the length of AB is 25 units
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The area of a square is 400 square units.
Select all the statements that would be true if the length of each side of the square increased by one unit.
A:The area of the square would be a rational number.
B:The area of the square would be an irrational number.
C:Each side length would be a perfect square.
D: The area of the square would be a perfect square.
E:The area of the square would be a nonterminating, nonrepeating decimal.
Answers
Answer: A and D
Step-by-step explanation: \(\sqrt{400\) is a rational number because when calculate the square root 400 you get 20. \(\sqrt\\400\) is a rational number. The area of the square would be perfect square because 20*20=400. A and D are the correct answers.
Divide.
8.64÷(−0.27)
Enter your answer in the box.
Answers
The answer is -2.3328
Given mn, find the value of x.
t
(7x-9)°
(4x-3)
Answers
The value of x = 2°
It is given that line m is parallel to n.
Corresponding angle:
Any pair of angles each of which is on the same side of one of two lines cut by a transversal and on the same side of the transversal.
By this, we get that
(7x - 9)° = (4x -3)° ( by corresponding angle)
3x = 6
x = 2°
Therefore the value of x = 2.
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Perioddddddd poohhhh
Answers
Answer:
cute ima just be bold and say that i like you your really pretty
Round 29.675 to
the hundredths place.
Answers
Answer:
29.68
Step-by-step explanation:
If you are rounding to the hundredth place, you take the number in the hundredth place and round it. If it is less than five, for example, if you were rounding 29.674 then it would be 29.67 because 4 is not 5 or more. With 29.675 you will round to 29.68. A saying to remember is, five or above, give it a shove.
arsene wenger pushes a box with a force of 60N over a distance 10m calculate the work done
Answers
Answer:
600J
Step-by-step explanation:
work done = force x distance
= 60 x 10
= 600J
The workdone by arsene wenger in joules is 600J
What is workdone?Work doneis defined as product of the force and the distance over which the force is applied. It is a scalar quantity and it is measured in Joules.(J)
Workdone is expressed as;
Workdone = f × d
where do is the force and d is the distance.
The force he uses on the box is 60N and the distance he pushes the box is 10m. All quantities in their SI unit.
Therefore, the workdone by arsene wernger is
W = 60 × 10
W = 600J
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Solve equation or formula for the variable specified
Xy-9z=4 for y
Answers
Answer:
y=4/x+9z/x
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
y = \(\frac{4+9z}{x}\)
Solve the equation for y: 6x-2y=14
Must show work
Answers
Answer:
i dont know this
Step-by-step explanation:
but what grade are u in?
through (12,8); perpendicular to y=-4
Answers
Answer:
vagna
Step-by-step explanation: thats all folks